Sumitomo Metal Mining Co., Ltd.

Japan

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2023 12
2022 13
2021 9
2020 7
2019 18
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IPC Class
C22B 23/00 - Obtaining nickel or cobalt 36
C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof 25
C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes 19
C22B 15/00 - Obtaining copper 15
C22B 23/02 - Obtaining nickel or cobalt by dry processes 15
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Status
Pending 36
Registered / In Force 62
Found results for  patents

1.

ALLOY TREATMENT METHOD

      
Document Number 03233494
Status Pending
Filing Date 2022-09-22
Open to Public Date 2023-04-06
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Takenouchi, Hiroshi
  • Shouji, Hirofumi
  • Matsuoka, Itsumi
  • Matsugi, Takumi
  • Sanjo, Shota
  • Asano, Satoshi
  • Heguri, Shin-Ichi

Abstract

Provided is a method for efficiently obtaining a solution containing nickel and/or cobalt from alloys containing nickel and/or cobalt and copper, such as waste lithium-ion batteries. The present invention pertains to an alloy treatment method for obtaining a solution containing nickel and/or cobalt from alloys containing nickel and/or cobalt and copper, the method comprising: a leaching step S1 in which an acid solution is added to the alloys in the presence of a sulfurizing agent to perform a leaching treatment and obtain a leachate and a leaching residue; and a cementation step S2 in which a reducing agent and a sulfurizing agent are added to the resulting leachate to perform a copper-removal treatment for sulfurizing at least copper contained in the leachate and obtain a post-copper removal solution and a copper-removed residue, wherein the copper-removed residue obtained through the copper-removal treatment in the cementation step S2 is repeatedly subjected to the leaching step S1 and subjected to a leaching treatment together with the alloys.

IPC Classes  ?

  • C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
  • C22B 3/46 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes by substitution, e.g. by cementation
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • C22B 15/00 - Obtaining copper
  • C22B 23/00 - Obtaining nickel or cobalt
  • H01M 10/54 - Reclaiming serviceable parts of waste accumulators

2.

METHOD FOR PRODUCING LITHIUM HYDROXIDE

      
Document Number 03231269
Status Pending
Filing Date 2022-09-26
Open to Public Date 2023-04-06
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Takano, Masatoshi
  • Asano, Satoshi
  • Heguri, Shin-Ichi
  • Ikeda, Osamu
  • Matsumoto, Shin-Ya
  • Kudo, Yohei
  • Murakami, Akihiro
  • Senba, Yusuke
  • Maeda, Kyohei

Abstract

To provide a method for producing lithium hydroxide allowing increasing a purity of an obtained lithium hydroxide. The method for producing lithium hydroxide includes a lithium adsorption step, a lithium elution step, an impurity removal step, and a conversion step. The impurity removal step includes: (3A) a carbonating step of a step of adding a carbonic acid source to a second lithium containing solution to obtain rough lithium carbonate; (3B) a hydrocarbonating step of a step of blowing carbon dioxide to a slurry containing rough lithium carbonate to obtain a lithium hydrogen carbonate solution; (3C) a decarbonation step of a step of heating the lithium hydrogen carbonate solution to obtain purified lithium carbonate; and (3D) an acid solution dissolution step of a step of dissolving the purified lithium carbonate in an acid solution to obtain a third lithium containing solution. Since this aspect allows reliably removing a metal other than lithium, the purity of the obtained lithium hydroxide is allowed to be increased.

IPC Classes  ?

3.

METHOD FOR PROCESSING ALLOY

      
Document Number 03231411
Status Pending
Filing Date 2022-08-24
Open to Public Date 2023-03-16
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Shouji, Hirofumi
  • Takenouchi, Hiroshi
  • Matsuoka, Itsumi
  • Sanjo, Shota
  • Matsugi, Takumi
  • Asano, Satoshi
  • Heguri, Shin-Ichi

Abstract

A method is provided which enables selectively leaching nickel and/or cobalt from an alloy that contains copper and nickel and/or cobalt in a waste lithium ion battery. This alloy processing method involves obtaining a solution that contains nickel and/or cobalt from an alloy that contains copper and nickel and/or cobalt, wherein the alloy processing method involves a leaching step for adding an acid solution to the alloy in a state in which a sulfurizing agent is also present, and obtaining a leachate and a leaching residue by performing leaching processing while controlling the redox potential (the reference electrode being a silver / silver chloride electrode) to at least 100mV and less than 250mV. In the leaching processing in the leaching step, an operation is performed that temporarily decreases the redox potential to less than or equal to -100mV.

IPC Classes  ?

  • C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes

4.

ALLOY PROCESSING METHOD

      
Document Number 03230413
Status Pending
Filing Date 2022-08-31
Open to Public Date 2023-03-09
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Shouji, Hirofumi
  • Takenouchi, Hiroshi
  • Matsuoka, Itsumi
  • Sanjo, Shota
  • Matsugi, Takumi
  • Heguri, Shin-Ichi
  • Asano, Satoshi

Abstract

Provided is a method for effectively obtaining a solution containing nickel and/or cobalt from an alloy that contains copper as well as nickel and/or cobalt, in a waste lithium-ion battery or the like. The present invention is an alloy processing method for obtaining a solution containing nickel and/or cobalt from an alloy that contains copper as well as nickel and/or cobalt, said method including a leaching step for carrying out an acid solution leaching treatment on an alloy-containing slurry in the presence of a sulfurising agent to obtain a leachate and a leaching residue. In the leaching step, the leaching treatment is carried out with the initial concentration of the alloy-containing slurry adjusted to between 100 g/L and 250 g/L. Moreover, in the leaching step, the leaching treatment is preferably carried out while controlling the redox potential (using a silver/silver chloride electrode as a reference electrode) to 200 mV or less. Furthermore, in the leaching step, the leaching treatment is preferably carried out in the presence of the sulfurising agent in an amount in the range of 1.05 to 1.25 equivalent weight (S-mol/Cu-mol) in relation to the amount of copper contained in the alloy.

IPC Classes  ?

  • C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • C22B 23/00 - Obtaining nickel or cobalt

5.

METHOD FOR PRODUCING VALUABLE METAL

      
Document Number 03230561
Status Pending
Filing Date 2022-07-19
Open to Public Date 2023-03-09
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Yamashita, Yu
  • Hagio, Tomoya

Abstract

To provide a method capable of inexpensively producing a valuable metal. A method according to the present invention includes at least a preparation step of preparing a raw material containing Li, Mn, Al, and valuable metals; a reductive melting step of subjecting the raw material to a reductive melting treatment to obtain a reduced product containing an alloy containing valuable metals and a slag; and a slag separation step of separating the slag from the reduced product to recover the alloy, wherein in any one or both of the preparation step and the reductive melting step, a flux containing calcium (Ca) is added, a molar ratio (Li/Al ratio) of Li to Al in the slag obtained by the reductive melting treatment is 0.25 or more, a molar ratio (Ca/Al ratio) of Ca to Al in the slag is 0.30 or more, and a Mn amount in the slag is 5.0 mass% or more, and in the reductive melting treatment, an oxygen partial pressure in a melt obtained by melting the raw material is controlled to 10-14 or more and 10-11 or less.

IPC Classes  ?

6.

ELECTRIC FURNACE AND METHOD FOR PRODUCING VALUABLE METAL

      
Document Number 03229939
Status Pending
Filing Date 2022-08-09
Open to Public Date 2023-03-02
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor Maeba, Kazunari

Abstract

Provided is a technology for executing stable processing by extending the furnace refractory life in an electric furnace for heating and melting a raw material containing a valuable metal. The present invention provides an electric furnace for heating and melting a raw material containing a valuable metal, the electric furnace including: a furnace body; and a plurality of electrodes that are provided so as to hang down into the interior of the furnace body from a top section thereof. The raw material is heated and melted in the furnace body by energizing the electrodes and a molten material consisting of a slag and a metal is generated. The electric furnace is configured so that the overall heat transfer coefficient of a side wall of the furnace body is lower than the overall heat transfer coefficient of a side wall of the furnace body, the side wall coming into contact with a layer of the metal formed in a bottom layer, the side wall coming into contact with a layer of the slag formed in a top layer, and said layers being formed in the molten material due to gravity separation.

IPC Classes  ?

  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • F27B 3/14 - Arrangements of linings
  • F27B 3/16 - Walls; Roofs
  • F27D 1/00 - Casings; Linings; Walls; Roofs

7.

POSITIVE ELECTRODE ACTIVE MATERIAL, HIGH-TEMPERATURE OPERATION TYPE LITHIUM-ION POLYMER SECONDARY BATTERY, HIGH-TEMPERATURE OPERATION TYPE LITHIUM ION INORGANIC ALL-SOLID-STATE SECONDARY BATTERY

      
Document Number 03153532
Status Pending
Filing Date 2022-03-25
Open to Public Date 2023-02-28
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Oono, Kouji
  • Oshitari, Satoru
  • Tanaka, Shinichi

Abstract

A positive electrode active material that is used in a high-temperature operation type lithium ion solid secondary battery, wherein the positive electrode active material is made of oxide particles, which contains a first transition element and does not include an alkali metal.

IPC Classes  ?

  • H01M 10/39 - Accumulators not provided for in groups working at high temperature
  • H01M 4/131 - Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
  • H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
  • H01M 10/0562 - Solid materials
  • H01M 10/0565 - Polymeric materials, e.g. gel-type or solid-type

8.

METHOD OF PRETREATING GOLD ORE AND GOLD RECOVERY METHOD

      
Document Number 03227387
Status Pending
Filing Date 2022-08-03
Open to Public Date 2023-02-09
Owner
  • KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION (Japan)
  • SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Sasaki, Keiko
  • Konadu, Kojo Twum
  • Mendoza Flores, Diego Moizes
  • Sakai, Ryotaro
  • Suyama, Ikumi
  • Hirajima, Tsuyoshi
  • Aoki, Yuji
  • Murase, Nana

Abstract

Provided is a method of pretreating gold ore that allows easily recovering gold and a gold recovery method in which a recovery proportion of gold is high even when the gold ore contains sulfide or a carbonaceous component. The pretreatment method includes a biological oxidation step of bringing the gold ore containing the sulfide into contact with iron oxidizing bacteria and holding them for a predetermined time. The gold recovery method includes: a pretreatment step of pretreating the gold ore by the pretreatment method; a leaching step of leaching the gold from the gold ore to obtain a leaching solution; an adsorption step of adsorbing gold in the leaching solution to activated carbon; and an eluting step of eluting the gold from the activated carbon to obtain a gold solution. Since the sulfide confining the gold particles is oxidatively decomposed by an action of the iron oxidizing bacteria, the gold particles are liberated, thus facilitating the recovery of the gold. As a result, the recovery proportion of the gold can be high.

IPC Classes  ?

  • C22B 1/00 - Preliminary treatment of ores or scrap
  • C22B 3/04 - Extraction of metal compounds from ores or concentrates by wet processes by leaching
  • C22B 3/18 - Extraction of metal compounds from ores or concentrates by wet processes with the aid of microorganisms or enzymes, e.g. bacteria or algae
  • C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
  • C22B 11/00 - Obtaining noble metals

9.

METHOD FOR PROCESSING ALLOY

      
Document Number 03225674
Status Pending
Filing Date 2022-07-14
Open to Public Date 2023-01-26
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Takenouchi, Hiroshi
  • Heguri, Shin-Ichi
  • Asano, Satoshi
  • Shouji, Hirofumi
  • Matsuoka, Itsumi
  • Sanjo, Shota
  • Matsugi, Takumi

Abstract

The present invention provides a method that is capable of selectively obtaining nickel and/or cobalt from an alloy, which contains copper as well as nickel and/or cobalt, in a waste lithium ion battery or the like. A method for processing an alloy according to the present invention comprises: a leaching step S1 in which an alloy that contains copper as well as nickel and/or cobalt is subjected to a leaching treatment by means of an acid solution in the coexistence of a sulfurizing agent, thereby obtaining a leachate and a leaching residue; and a reduction step S2 in which a reducing agent is added to the thus-obtained leachate so as to reduce the leachate, thereby obtaining a post-reduction solution and a reduction residue. This method for processing an alloy is characterized in that the reduction is carried out in the reduction step S2, while controlling the addition amount of the reducing agent so that the redox potential of the leachate is 0 mV or less as determined where a silver/silver chloride electrode is the reference electrode.

IPC Classes  ?

  • C22B 3/04 - Extraction of metal compounds from ores or concentrates by wet processes by leaching
  • C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
  • C22B 3/46 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes by substitution, e.g. by cementation
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • C22B 23/00 - Obtaining nickel or cobalt

10.

METHOD FOR TREATING ALLOY

      
Document Number 03226241
Status Pending
Filing Date 2022-07-14
Open to Public Date 2023-01-26
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Shouji, Hirofumi
  • Takenouchi, Hiroshi
  • Matsuoka, Itsumi
  • Sanjo, Shota
  • Matsugi, Takumi
  • Asano, Satoshi
  • Heguri, Shin-Ichi

Abstract

Provided is a method for obtaining a solution having a high concentration of nickel and/or cobalt from an alloy that contains copper as well as nickel and/or cobalt, in a waste lithium-ion battery or the like. A method for treating an alloy according to the present invention comprises: a leaching step S1 for subjecting an alloy that contains copper as well as nickel and/or cobalt to a leaching treatment by using an acid solution in the presence of a sulfiding agent to obtain a leachate and a leaching residue; and a reduction step S2 for adding a reducing agent to a part of the obtained leachate and performing a reduction treatment to obtain a post-reduction solution and a reduction residue, wherein in the leaching step S1, the leachate that has not been provided in the reduction treatment in the reduction step S2, is repeatedly used as part or all of the acid solution added in the leaching treatment.

IPC Classes  ?

  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
  • C22B 3/08 - Sulfuric acid
  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
  • H01M 10/54 - Reclaiming serviceable parts of waste accumulators
  • C22B 23/00 - Obtaining nickel or cobalt

11.

PRODUCTION METHOD FOR VALUABLE METALS

      
Document Number 03224404
Status Pending
Filing Date 2022-03-25
Open to Public Date 2023-01-19
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Yamashita, Yu
  • Nagakura, Toshihiko
  • Hagio, Tomoya

Abstract

Provided is a method by which it is possible to safely and efficiently collect valuable metals from raw material including waste lithium-ion batteries or the like. The present invention is a method which is for producing valuable metals from raw material that contains valuable metals including Cu, Ni, and Co and which includes: a step for preparing raw material including at least Li, Al, and the valuable metals; a step for obtaining a reduction that includes slag and an alloy containing the valuable metals by subjecting the raw material to a reduction melting treatment; and a slag separation step for collecting the alloy by separating out the slag from the reduction, wherein, in a step for adding a flux containing calcium (Ca) to the raw material and performing reduction and melting thereof, the reduction melting treatment is performed such that the liquidus line temperature of ternary Al2O3?Li2O?CaO slag in a phase diagram is greater than the liquidus line temperature of a ternary Cu?Ni?Co alloy in a phase diagram.

IPC Classes  ?

  • C22B 9/10 - General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor
  • C22B 1/04 - Blast roasting
  • C22B 5/02 - Dry processes
  • C22B 23/02 - Obtaining nickel or cobalt by dry processes

12.

METHOD FOR PRODUCING VALUABLE METAL

      
Document Number 03224394
Status Pending
Filing Date 2022-03-25
Open to Public Date 2023-01-19
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Yamashita, Yu
  • Nagakura, Toshihiko
  • Yabe, Takayuki

Abstract

Provided is a method for safely and efficiently recovering a valuable metal from a material including waste lithium ion batteries or the like. The present invention is for producing a valuable metal from a material including the valuable metal, the method comprising: a preparation step for preparing a material including at least Li, Al, and a valuable metal; a reduction and melting step for carrying out a reduction and melting process on the material to obtain a reduced product including a slag and an alloy containing a valuable metal; and a slag separation step for separating the slag from the reduced product to recover the alloy. In the preparation step and/or the reduction and melting step, a flux containing Ca is added to the material. In the reduction and melting step, the reduction and melting process is carried out such that the mass ratio of aluminum oxide / (aluminum oxide + calcium oxide + lithium oxide), in the generated slag, is set to 0.5-0.65, and the slag heating temperature is set to 1400-1600ºC.

IPC Classes  ?

  • C22B 9/10 - General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor
  • C22B 1/02 - Roasting processes
  • C22B 5/02 - Dry processes

13.

METHOD FOR PRODUCING VALUABLE METAL

      
Document Number 03222003
Status Pending
Filing Date 2022-03-14
Open to Public Date 2022-12-22
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor Yamashita, Yu

Abstract

The present invention provides a method by which a valuable metal is able to be recovered with a high recovery rate by effectively and efficiently separating impurities, in particular iron, from a starting material to be processed. A method for producing a valuable metal that contains cobalt (Co), the method comprising: a preparation step in which a starting material that contains at least iron (Fe) and a valuable metal is prepared; a melting step in which a melt is obtained by heating and melting the starting material, and the melt is subsequently formed into a molten material that contains an alloy and slag; and a slag separation step in which the slag is separated from the molten material, thereby recovering the alloy that contains the valuable metal. In the preparation step, the Fe/Co mass ratio in the starting material is controlled to 0.5 or less; and in the melting step, the Co content in the slag that is obtained by heating and melting the starting material is set to 1% by mass or less.

IPC Classes  ?

  • C22B 23/02 - Obtaining nickel or cobalt by dry processes
  • C22B 5/10 - Dry processes by solid carbonaceous reducing agents

14.

METHOD OF PRODUCING VALUABLE METAL

      
Document Number 03222031
Status Pending
Filing Date 2022-03-14
Open to Public Date 2022-12-22
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor Yamashita, Yu

Abstract

Provided is a method of effectively and efficiently separating impurities, in particular, iron contained in a raw material to be processed, and recovering valuable metal at a high rate of recovery. Provided is a method of producing valuable metal including cobalt (Co), comprising: a preparation step for preparing a raw material containing at least iron (Fe) and the valuable metal; a fusing step for heating and fusing the raw material into a melt and thereafter making the melt into a fusion containing alloy and slag; and a slag separation step for separating the slag out from the fusion to recover alloy containing the valuable metal. In the preparation step, the mass ratio of Fe/Co in the raw material is controlled to 0.5 or less. In the fusion step, the oxygen partial pressure in the melt generated by heating and fusing the raw material is made to be 10-9.0 atm or less.

IPC Classes  ?

  • C22B 23/02 - Obtaining nickel or cobalt by dry processes
  • C22B 5/10 - Dry processes by solid carbonaceous reducing agents

15.

METHOD FOR PRODUCING VALUABLE METAL

      
Document Number 03217447
Status Pending
Filing Date 2022-03-14
Open to Public Date 2022-11-17
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Hagio, Tomoya
  • Yamashita, Yu

Abstract

Provided is a method for producing valuable metal from raw materials including, for example, waste lithium ion batteries by a pyrometallurgical method, said method making it possible to efficiently separate manganese included in the raw materials from metal into slag without lowering the valuable metal recovery rate. The present invention is a method for producing valuable metal from raw materials including at least lithium, manganese, and the valuable metal, said method comprising: a reduction melting step for subjecting the raw materials to a reduction melting process so as to obtain a reduction product containing slag and molten metal that contains valuable metal; a slag separation step for recovering the molten metal from the reduction product; and an oxidation purification step for adding silicon dioxide (SiO2) as flux to the recovered molten metal and performing an oxidation melting process. In the oxidation purification step, SiO2 is added as the flux such that the SiO2/MnO weight ratio is 0.4-1.0 in the slag.

IPC Classes  ?

16.

METHOD FOR PRODUCING VALUABLE METAL

      
Document Number 03216016
Status Pending
Filing Date 2022-03-25
Open to Public Date 2022-10-27
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Yabe, Takayuki
  • Yamashita, Yu

Abstract

The present invention provides a method for producing a valuable metal from a starting material that contains waste lithium ion batteries, the method being capable of effectively obtaining a metal which has a reduced phosphorus content.?The present invention provides a method for producing a valuable metal from a starting material that contains waste lithium ion batteries containing phosphorus, the method comprising: a melting step in which the starting material is melted, thereby obtaining a melt; and a slag separation step in which slag is separated from the melt and an alloy containing a valuable metal is recovered. According to the present invention, an alloy is recovered, while making it sure that the recovery ratio of cobalt from the starting material is from 95.0% to 99.6%, thereby suppressing the phosphorus content in the alloy to 0.1% by mass or less.

IPC Classes  ?

  • C22B 23/02 - Obtaining nickel or cobalt by dry processes
  • C22B 5/10 - Dry processes by solid carbonaceous reducing agents

17.

FLOTATION METHOD AND FLOTATION SYSTEM

      
Document Number 03200493
Status Pending
Filing Date 2021-08-24
Open to Public Date 2022-06-23
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Fujita, Hayato
  • Aoki, Yuji

Abstract

The purpose of the present invention is to provide a flotation method with which a flotation treatment can be efficiently performed even when the substance to undergo flotation is fine mineral particles including particles having a particle diameter of about 25 ?m or less. This is a flotation method that separates and recovers mineral particles through a flotation treatment, wherein mineral particles are floated in a liquid to be processed by using minute air bubbles having an air bubble diameter of 200 ?m or less and air bubbles having a diameter larger than the minute air bubbles.

IPC Classes  ?

18.

POSITIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES, POSITIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY

      
Document Number 03113265
Status In Force
Filing Date 2021-03-25
Open to Public Date 2022-03-30
Grant Date 2023-03-28
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Nozoe, Tsutomu
  • Nakano, Toyomasa

Abstract

A positive electrode material for lithium ion secondary batteries is provided, wherein a ratio (A/B) of an oil absorption amount (A) of powder per unit mass of the material, which is measured using N-methyl-2-pyrrolidone, to a void volume (B) of powder per unit mass of the material is 0.30 or more and 0.85 or less, and a ratio (C/D) of a powder density (C) of the material, which is measured in a powder pressure test at a pressure of 4.5 MPa, to an initial powder density (D) of the material is 1.3 or more and 1.7 or less.

IPC Classes  ?

  • H01M 4/13 - Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
  • H01M 4/136 - Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
  • H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
  • H01M 4/04 - Processes of manufacture in general
  • H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers

19.

ALLOY POWDER, METHOD FOR MANUFACTURING SAME, AND METHOD FOR RECOVERING VALUABLE METAL

      
Document Number 03190553
Status Pending
Filing Date 2021-08-18
Open to Public Date 2022-03-03
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor Togashi, Ryo

Abstract

Provided are: an alloy powder in which nickel and cobalt can be easily dissolved in an acid and stably leached with an acid; a manufacturing method with which an alloy powder that enables stable acid leaching can be obtained at low cost; and a method for recovering a valuable metal using the manufacturing method. An alloy powder according to the present invention includes copper (Cu), nickel (Ni), and cobalt (Co) as constituents, has a 50% cumulative diameter (D50) of 30 ?m to 85 ?m in the volume particle size distribution, and has an oxygen content of 0.01 mass% to 1.00 mass%.

IPC Classes  ?

  • B22F 1/00 - Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
  • B22F 9/08 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
  • C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • C22B 15/00 - Obtaining copper
  • C22B 23/00 - Obtaining nickel or cobalt
  • C22B 23/02 - Obtaining nickel or cobalt by dry processes
  • C22C 9/06 - Alloys based on copper with nickel or cobalt as the next major constituent
  • C22C 19/03 - Alloys based on nickel or cobalt based on nickel
  • C22C 30/02 - Alloys containing less than 50% by weight of each constituent containing copper

20.

ATOMIZATION DEVICE, MANUFACTURING METHOD OF METAL POWDER, AND MANUFACTURING METHOD OF VALUABLE METAL

      
Document Number 03190551
Status Pending
Filing Date 2021-08-18
Open to Public Date 2022-03-03
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor Togashi, Ryo

Abstract

Provided is a technique for obtaining metal powder having little variation in particle size by stabilizing the supply amount of molten metal when manufacturing the metal powder by means of atomization. The present invention is an atomization device 1 for manufacturing metal powder by spraying a fluid to molten metal M, said device comprising: a tundish 11 into which the molten metal M is poured and discharged from a discharge nozzle 11N installed on a bottom part 11b; fluid spray nozzles 12 disposed below the tundish 11 and spraying the fluid to the molten metal M dropping from the tundish 11; a means for measuring a molten-metal surface height Mh inside the tundish 11 from an image obtained by imaging the inside of the tundish 11; and a means for, upon calculating an amount of the molten metal M to be poured into the tundish 11 from the molten-metal surface height Mh, discharging the molten metal in such a manner that the height is maintained substantially constant. The interior of the tundish 11 is formed in such a shape that the area of the molten-metal surface of the poured molten metal M increases with height in the vertical direction.

IPC Classes  ?

  • B22F 1/00 - Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
  • B22F 9/08 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
  • C22B 1/14 - Agglomerating; Briquetting; Binding; Granulating
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • C22C 9/06 - Alloys based on copper with nickel or cobalt as the next major constituent
  • C22C 23/00 - Alloys based on magnesium
  • C22C 30/02 - Alloys containing less than 50% by weight of each constituent containing copper

21.

METHOD FOR TREATING SULFIDE

      
Document Number 03187383
Status Pending
Filing Date 2021-08-05
Open to Public Date 2022-02-24
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Takenouchi, Hiroshi
  • Heguri, Shin-Ichi
  • Asano, Satoshi
  • Shouji, Hirofumi

Abstract

Provided is a method for treating a sulfide, the method being suitable for obtaining nickel and/or cobalt from a sulfide containing copper and nickel and/or cobalt. The method relates to a method for treating a sulfide containing copper and nickel and/or cobalt, the method including pulverizing the sulfide by subjecting the sulfide to a pulverizing treatment so as to obtain a pulverized sulfide having a particle size of 800 ?m or less; and leaching the pulverized sulfide by subjecting the pulverized sulfide to a leaching treatment with an acid under a condition in which a sulfurizing agent is present to obtain a leachate. For example, the sulfide to be treated is generated by reducing, heating, and melting a waste lithium-ion battery to obtain a molten body and adding a sulfurizing agent to the molten body to sulfurize the molten body.

IPC Classes  ?

  • B09B 3/00 - Destroying solid waste or transforming solid waste into something useful or harmless
  • C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
  • C22B 3/08 - Sulfuric acid
  • C22B 3/10 - Hydrochloric acid
  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
  • C22B 3/46 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes by substitution, e.g. by cementation
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • C22B 23/00 - Obtaining nickel or cobalt
  • H01M 10/54 - Reclaiming serviceable parts of waste accumulators

22.

METHOD FOR RECOVERING VALUABLE METAL

      
Document Number 03185251
Status Pending
Filing Date 2021-07-12
Open to Public Date 2022-01-27
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Maeba, Kazunari
  • Yamashita, Yu
  • Nagakura, Toshihiko
  • Takahashi, Junichi
  • Togashi, Ryo

Abstract

Provided is a method that allows for efficient removal of an impurity metal, and further, the recovery of a valuable metal with high efficiency while suppressing the erosion of a refractory material of a furnace, in recovering a valuable metal from a valuable-metal-containing charge in a pyrometallurgy process. The method for recovering a valuable metal (Cu, Ni, and Co) includes the steps of: preparing a charge comprising at least a valuable metal as a raw material; heating and melting the raw material to form an alloy and a slag; and separating the slag to recover the alloy containing the valuable metal, wherein the heating and melting of the raw material comprises charging the raw material into a furnace of an electric furnace equipped with an electrode therein, and further melting the raw material by means of Joule heat generated by applying an electric current to the electrode, or heat generation of an arc itself, and thereby separating the raw material into a molten alloy and a molten slag present over the alloy.

IPC Classes  ?

  • C22B 23/02 - Obtaining nickel or cobalt by dry processes
  • C22B 9/20 - Arc remelting
  • F27D 11/04 - Ohmic resistance heating with direct passage of current through the material being heated

23.

METHOD FOR RECOVERING VALUABLE METAL

      
Document Number 03184246
Status Pending
Filing Date 2021-06-29
Open to Public Date 2022-01-13
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Yamashita, Yu
  • Nagakura, Toshihiko
  • Hagio, Tomoya

Abstract

Provided is a method which allows for strict control of an oxygen partial pressure required for the heating and melting of a raw material, and thereby more efficient recovery of a valuable metal. The method for recovering a valuable metal (Cu, Ni, and Co) includes the steps of: preparing a charge comprising at least phosphorus (P) and a valuable metal as a raw material; heating and melting the raw material to form a molten body and then converting the molten body into a molten product comprising an alloy and a slag; and separating the slag from the molten product to recover the alloy comprising the valuable metal, wherein the heating and melting of the raw material comprises directly measuring an oxygen partial pressure in the molten body using an oxygen analyzer, and regulating the oxygen partial pressure based on the obtained measurement result.

IPC Classes  ?

  • B09B 3/00 - Destroying solid waste or transforming solid waste into something useful or harmless
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • C22B 15/00 - Obtaining copper
  • C22B 23/02 - Obtaining nickel or cobalt by dry processes
  • H01M 10/54 - Reclaiming serviceable parts of waste accumulators

24.

METHOD FOR RECOVERING VALUABLE METAL

      
Document Number 03184863
Status In Force
Filing Date 2021-06-21
Open to Public Date 2022-01-13
Grant Date 2024-01-30
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor Yamashita, Yu

Abstract

The present invention provides a method which is capable of more strictly controlling the oxygen partial pressure required during the melting of a starting material, thereby being capable of recovering a valuable metal more efficiently. A method for recovering valuable metals (Cu, Ni, Co), said method comprising the following steps: a step for preparing, as a starting material, a charge that contains at least phosphorus (P), iron (Fe) and valuable metals; a step for heating and melting the starting material into a melt, and subsequently forming the melt into a molten material that contains an alloy and slag; and a step for recovering the alloy that contains valuable metals by separating the slag from the molten material. With respect to this method for recovering valuable metals, the oxygen partial pressure in the melt is directly measured with use of an oxygen analyzer when the starting material is heated and melted, and the oxygen partial pressure is controlled on the basis of the thus-obtained measurement result.

IPC Classes  ?

  • B09B 3/00 - Destroying solid waste or transforming solid waste into something useful or harmless
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • C22B 15/00 - Obtaining copper
  • C22B 23/00 - Obtaining nickel or cobalt
  • C22B 23/02 - Obtaining nickel or cobalt by dry processes

25.

METHOD FOR RECOVERING VALUABLE METAL

      
Document Number 03184854
Status In Force
Filing Date 2021-06-21
Open to Public Date 2022-01-13
Grant Date 2024-01-02
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor Yamashita, Yu

Abstract

The present invention provides a method which is capable of more strictly controlling the oxygen partial pressure required during the melting of a starting material, thereby being capable of recovering a valuable metal more efficiently. A method for recovering valuable metals (Cu, Ni, Co), said method comprising the following steps: a step for preparing, as a starting material, a charge that contains at least phosphorus (P), manganese (Mn) and valuable metals; a step for heating and melting the starting material into a melt, and subsequently forming the melt into a molten material that contains an alloy and slag; and a step for recovering the alloy that contains valuable metals by separating the slag from the molten material. With respect to this method for recovering valuable metals, the oxygen partial pressure in the melt is directly measured with use of an oxygen analyzer when the starting material is heated and melted, and the oxygen partial pressure is controlled on the basis of the thus-obtained measurement result.

IPC Classes  ?

  • B09B 3/00 - Destroying solid waste or transforming solid waste into something useful or harmless
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • C22B 15/00 - Obtaining copper
  • C22B 23/02 - Obtaining nickel or cobalt by dry processes
  • H01M 10/54 - Reclaiming serviceable parts of waste accumulators

26.

METHOD FOR RECOVERING VALUABLE METAL

      
Document Number 03171499
Status In Force
Filing Date 2021-03-26
Open to Public Date 2021-10-14
Grant Date 2024-04-30
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Hagio, Tomoya
  • Yamashita, Yu

Abstract

The purpose is to provide a method for recovering a valuable metal at low cost. The present invention is a method for recovering a valuable metal, the method comprising a step of preparing a burden material containing at least a valuable metal to obtain a raw material, a step of subjecting the raw material to an oxidation treatment and a reductive melting treatment to produce a reduced product containing an alloy and a slag, and a step of separating the slag from the reduced product to collect the alloy, in which the copper grade, which is a ratio of the mass of copper (Cu) to the total mass of nickel (Ni), cobalt (Co) and copper (Cu) contained in the alloy (i.e., a Cu/(Ni+Co+Cu) ratio), is adjusted to 0.250 or more.

IPC Classes  ?

  • B09B 3/00 - Destroying solid waste or transforming solid waste into something useful or harmless
  • B09B 5/00 - Operations not covered by a single other subclass or by a single other group in this subclass
  • C22B 1/02 - Roasting processes
  • C22B 5/10 - Dry processes by solid carbonaceous reducing agents
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • C22B 15/00 - Obtaining copper
  • C22B 23/02 - Obtaining nickel or cobalt by dry processes
  • H01M 10/54 - Reclaiming serviceable parts of waste accumulators

27.

POSITIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, POSITIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY

      
Document Number 03094581
Status Pending
Filing Date 2020-09-25
Open to Public Date 2021-09-30
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Nozoe, Tsutomu
  • Nakano. Toyomasa

Abstract

A positive electrode material for a lithium ion secondary battery containing carbon, in which, when a peak of the carbon that is measured by Raman scattering and is present at 2200 to 3400 cm-1 is peak-separated into peaks including five types of Voigt functions of a peak 1 having a peak top present at 2200 to 2380 cm-1, a peak 2 having a peak top present at 2400 to 2550 cm-1, a peak 3 having a peak top present at 2600 to 2750 cm-1, a peak 4 having a peak top present at 2850 to 2950 cm-1, and a peak 5 having a peak top present at 3100 to 3250 cm-1, an average of proportions of Gaussian functions in the peak 3 and the peak 4 is 90% or more and less than 100%.

IPC Classes  ?

  • H01M 4/13 - Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
  • H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
  • H01M 4/136 - Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy

28.

METHOD FOR TREATING ALLOY

      
Document Number 03172952
Status Pending
Filing Date 2021-03-11
Open to Public Date 2021-09-30
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Kudou, Keiji
  • Asano, Satoshi
  • Heguri, Shin-Ichi
  • Takenouchi, Hiroshi
  • Shouji, Hirofumi
  • Matsuoka, Itsumi
  • Sanjo, Shota
  • Matsugi, Takumi

Abstract

The present invention provides a method for treating an alloy, wherein nickel and/or cobalt is obtained by separating copper and zinc from an alloy that contains copper, zinc, and nickel and/or cobalt. The present invention is a method for treating an alloy, by which a solution that contains nickel and/or cobalt is obtained from an alloy that contains copper, zinc, and nickel and/or cobalt, said method comprising: a leaching process wherein a leachate is obtained by subjecting the alloy to a leaching treatment by means of an acid in the coexistence of a sulfurizing agent; a reduction process wherein the leachate is subjected to a reduction treatment with use of a reducing agent; and an ion exchanging process wherein a solution that contains nickel and/or cobalt is obtained by bringing a solution, which has been obtained in the reduction process, into contact with an amino phosphoric acid-based chelate resin, thereby having zinc adsorbed on the amino phosphoric acid-based chelate resin.

IPC Classes  ?

  • B09B 3/00 - Destroying solid waste or transforming solid waste into something useful or harmless
  • C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
  • C22B 3/42 - Treatment or purification of solutions, e.g. obtained by leaching by ion-exchange extraction
  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • C22B 19/00 - Obtaining zinc or zinc oxide
  • C22B 23/00 - Obtaining nickel or cobalt
  • H01M 10/54 - Reclaiming serviceable parts of waste accumulators

29.

ALLOY TREATMENT METHOD

      
Document Number 03172961
Status Pending
Filing Date 2021-03-11
Open to Public Date 2021-09-30
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Kudou, Keiji
  • Asano, Satoshi
  • Heguri, Shin-Ichi
  • Takenouchi, Hiroshi
  • Shouji, Hirofumi
  • Matsuoka, Itsumi
  • Sanjo, Shota
  • Matsugi, Takumi

Abstract

Provided is an alloy treatment method comprising separating copper and zinc from an alloy containing nickel and/or cobalt and also containing copper and zinc to obtain nickel and/or cobalt selectively. An alloy treatment method is provided, in which a solution containing nickel and/or cobalt is obtained from an alloy containing nickel and/or cobalt and also containing copper and zinc, the method comprising: a leaching step for subjecting the alloy to a leaching treatment with an acid under the condition where a sulfating agent is present to produce a leachate; a reduction step for subjecting the leachate to a reduction treatment using a reducing agent to produce a reduced solution; an oxidation/neutralization step for adding an oxidizing agent and a neutralizing agent to the reduced solution to produce a neutralized solution containing nickel and/or cobalt and also containing zinc; and a solvent extraction step for subjecting the neutralized solution to a solvent extraction procedure using an acidic phosphorus compound-based extractant to produce a solution containing nickel and/or cobalt.

IPC Classes  ?

  • B09B 3/00 - Destroying solid waste or transforming solid waste into something useful or harmless
  • C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
  • C22B 3/38 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • C22B 19/00 - Obtaining zinc or zinc oxide
  • C22B 23/00 - Obtaining nickel or cobalt
  • H01M 10/54 - Reclaiming serviceable parts of waste accumulators

30.

POSITIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, POSITIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY

      
Document Number 03094586
Status In Force
Filing Date 2020-09-25
Open to Public Date 2021-09-17
Grant Date 2023-03-14
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Oshitari, Satoru
  • Oono, Kouji
  • Nozoe, Tsutomu

Abstract

A positive electrode material for a lithium ion secondary battery includes an olivine-type phosphate-based compound represented by General Formula LixAyDzPO4 and carbon, and, in transmission electron microscopic observation of a cross section of a secondary particle that is an agglomerate of primary particles of the olivine-type phosphate-based compound, a 300-point average value of filling rates of the carbon that fills insides of voids having a diameter of 5 nm or larger that are formed by the primary particles is 30 to 70%. A is any one of Co, Mn, Ni, Fe, Cu, and Cr, D is any one of Mg, Ca, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, Sc, and Y, and x, y, and z satisfy 0.9 < x < 1.1, 0 < y 1.0, 0 z <1.0, and 0.9 < y + z < 1.1.

IPC Classes  ?

  • H01M 4/136 - Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
  • H01M 4/1397 - Processes of manufacture of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
  • H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries

31.

METHOD FOR TREATING ALLOY

      
Document Number 03167957
Status Pending
Filing Date 2021-02-10
Open to Public Date 2021-08-26
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Takenouchi, Hiroshi
  • Asano, Satoshi
  • Heguri, Shin-Ichi
  • Shouji, Hirofumi
  • Kudou, Keiji
  • Matsuoka, Itsumi
  • Sanjo, Shota
  • Matsugi, Takumi

Abstract

Provided is a method for treating an alloy by which nickel and/or cobalt can be selectively isolated from an alloy that contains copper as well as nickel and/or cobalt, in a waste lithium ion battery or the like.?The present invention is a method for treating an alloy, by which a solution that contains nickel and/or cobalt is obtained from an alloy that contains copper as well as nickel and/or cobalt, the method including: a leaching step in which a leachate is obtained by subjecting an alloy to an acid-based leaching treatment under conditions in which a sulfidizing agent is also present; a reduction step in which a reduced solution is obtained by subjecting the leachate to a reduction treatment using a reducing agent; and an oxidation/neutralization step in which a solution that contains nickel and/or cobalt is obtained by adding an oxidizing agent and also a neutralizing agent to the reduced solution.

IPC Classes  ?

  • B09B 3/00 - Destroying solid waste or transforming solid waste into something useful or harmless
  • B22F 1/00 - Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
  • B22F 9/08 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
  • C22B 1/02 - Roasting processes
  • C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
  • C22B 3/08 - Sulfuric acid
  • C22B 3/26 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
  • C22B 3/42 - Treatment or purification of solutions, e.g. obtained by leaching by ion-exchange extraction
  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
  • C22B 5/04 - Dry processes by aluminium, other metals, or silicon
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • C22B 15/00 - Obtaining copper
  • C22B 19/20 - Obtaining zinc otherwise than by distilling
  • C22B 23/00 - Obtaining nickel or cobalt
  • H01M 10/54 - Reclaiming serviceable parts of waste accumulators

32.

FLOATATION SEPARATION OF COPPER AND MOLYBDENUM USING DISULFITE

      
Document Number 03144373
Status In Force
Filing Date 2020-11-13
Open to Public Date 2021-06-03
Grant Date 2022-12-20
Owner
  • KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION (Japan)
  • SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Hirajima, Tsuyoshi
  • Miki, Hajime
  • Sasaki, Keiko
  • Suyantara, Gde Pandhe Wisnu
  • Semoto, Yuki
  • Kuroiwa, Shigeto
  • Aoki, Yuji
  • Tanaka, Yoshiyuki

Abstract

Provided is an ore dressing method that can efficiently separate copper ore from molybdenum ore. The ore dressing method comprises a conditioning step for adding a disulfite to ore slurry comprising copper ore and molybdenum ore; and, after the conditioning step, an ore flotation step in which ore flotation is performed using the ore slurry. By selectively increasing the hydrophilicity of the copper ore with the disulfite, a difference in hydrophilicity between the copper ore and molybdenum ore can be established. As a result, a selective flotation of the molybdenum ore can be brought about and the copper ore can be efficiently separated from the molybdenum ore.

IPC Classes  ?

33.

POSITIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, POSITIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY

      
Document Number 03075318
Status Pending
Filing Date 2020-03-12
Open to Public Date 2021-03-26
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Nozoe, Tsutomu
  • Nakano. Toyomasa

Abstract

A positive electrode material for a lithium ion secondary battery capable of obtaining a lithium ion secondary battery having a high discharge capacity and excellent cycle characteristics, a positive electrode for a lithium ion secondary battery using the positive electrode material, and a lithium ion secondary battery having the positive electrode are provided. Provided is the positive electrode material for a lithium ion secondary battery, including core particles and a carbonaceous film coating a surface of the core particles, in which in a Raman spectrum analysis of the carbonaceous film, in a case where a peak intensity of a spectrum in a wave number band of 1,200 to 1,400 cm-1 is set as D, a minimum intensity of 1,400 to 1,550 cm-1 is set as V, and a peak intensity of the spectrum of 1,550 to 1,700 cm-1 is set as G, an average D/G is 0.77 or more and 0.98 or less and an average V/G is 0.50 or more and 0.66 or less, and in a case where the average D/G is set as a and the average V/ G is set as b, X falls within a range of -0.1 X <=0.1 in Expression X = a - 1.47b.

IPC Classes  ?

  • H01M 4/136 - Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
  • H01M 4/587 - Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
  • H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries

34.

POSITIVE ELECTRODE MATERIAL FOR LITHIUM ION POLYMER BATTERY, POSITIVE ELECTRODE FOR LITHIUM ION POLYMER BATTERY, AND LITHIUM ION POLYMER BATTERY

      
Document Number 03073906
Status In Force
Filing Date 2020-02-27
Open to Public Date 2021-03-26
Grant Date 2022-08-09
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor Oono, Kouji

Abstract

The positive electrode material for a lithium ion polymer battery of the present invention is active material particles including core particles represented by General Formula Li x A y D z PO4 andthe carbonaceous film that coats surfaces of the core particles, wherein a paste including the active material particles has a viscosity of 5,000 mPa.cndot.s or less when a viscosity of the paste is measured at a shear rate of 4.0 [1/s], wherein the paste is a mixture of the active material particles, an ion-conductive polymer, a conductive auxiliary agent and a solvent, in which the active material particles, the ion-conductive polymer and the conductive auxiliary agent are included in the paste in a mass ratio of 66:30:4, and a total solid content of the paste is 40% by mass.

IPC Classes  ?

  • H01M 4/136 - Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
  • H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
  • H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers

35.

FROTH MOVING SPEED MEASURING DEVICE AND FROTH MOVING SPEED MEASURING METHOD, AND FLOTATION DEVICE AND FLOTATION METHOD USING FROTH MOVING SPEED MEASURING DEVICE AND FROTH MOVING SPEED MEASURING METHOD

      
Document Number 03141290
Status Pending
Filing Date 2020-05-18
Open to Public Date 2020-12-03
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor Sugihara, Jun

Abstract

A froth moving speed measuring device comprises: a light source for irradiating a top surface of a flotation tank with light; an imaging means for capturing an image of at least a portion of the top surface of the flotation tank; and a computation means for calculating a moving distance of froth from the image captured by the imaging means to calculate a moving speed of the froth.

IPC Classes  ?

  • G01P 3/38 - Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light using photographic means
  • B03D 1/02 - Froth-flotation processes
  • B03D 1/16 - Flotation machines with impellers; Subaeration machines
  • G06T 7/20 - Analysis of motion

36.

POSITIVE ELECTRODE MATERIAL FOR LITHIUM-ION SECONDARY BATTERIES, POSITIVE ELECTRODE FOR LITHIUM-ION SECONDARY BATTERIES, AND LITHIUM-ION SECONDARY BATTERY

      
Document Number 03056824
Status In Force
Filing Date 2019-09-26
Open to Public Date 2020-09-28
Grant Date 2022-04-26
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Nozoe, Tsutomu
  • Nakano, Toyomasa

Abstract

A positive electrode material for lithium-ion secondary batteries, wherein the positive electrode material includes a carbon-coated positive electrode active material which comprises primary particles, secondary particles, and a carbon film, wherein the primary particles and the secondary particles are coated with the carbon film, wherein the primary particles consists of a positive electrode active material in which a strain of the positive electrode active material, which is calculated by X-ray diffraction measurement, is 0.01% or higher and 0.1% or lower, and a ratio (B/A) of a crystallite diameter B (nm) of the positive electrode active material to an average primary particle diameter A (nm) of the carbon-coated positive electrode active material is 0.9 or higher and 1.5 or lower, wherein the particle diameter A is calculated from a specific surface area of the carbon-coated positive electrode active material, wherein the specific surface area is obtained using a BET method.

IPC Classes  ?

  • H01M 4/136 - Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
  • H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
  • H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers

37.

ELECTRODE MATERIAL, METHOD FOR MANUFACTURING ELECTRODE MATERIAL, ELECTRODE, AND LITHIUM ION BATTERY

      
Document Number 03054531
Status Pending
Filing Date 2019-09-06
Open to Public Date 2020-09-07
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Oono, Kouji
  • Oshitari, Satoru
  • Nozoe, Tsutomu
  • Oyama, Masataka

Abstract

An electrode material including a carbonaceous-coated electrode active material having primary particles of the electrode active material and secondary particles that are aggregates of the primary particles, and a carbonaceous film that coats the primary particles of the electrode active material and the secondary particles that are the aggregates of the primary particles, in which a specific surface area, which is obtained using a nitrogen adsorption method, is 4 m2/g or more and 40 m2/g or less, a volume of micropores per unit mass is 0.05 cm3/g or more and 0.3 cm3/g or less, and an average micropore diameter, which is obtained from the volume of the micropores per unit mass and the specific surface area, is 26 nm or more and 90 nm or less.

IPC Classes  ?

  • H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
  • H01M 4/131 - Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
  • H01M 4/136 - Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
  • H01M 4/1391 - Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
  • H01M 4/1397 - Processes of manufacture of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy

38.

METHOD FOR SMELTING OXIDE ORE

      
Document Number 03110025
Status Pending
Filing Date 2019-09-12
Open to Public Date 2020-03-26
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor Iseki, Takashi

Abstract

Disclosed are methods for smelting oxide ore, capable of efficiently producing high quality metal. For example, selected methods pertain to a smelting method for producing a metal such as ferronickel as a reduced product by reducing a mixture of a carbonaceous reducing agent and an oxide ore such as nickel oxide ore, the method comprising a reduction step in which the mixture is charged into a reduction furnace and the oxide ore is reduced by heating the mixture with a burner to obtain mol ten metal and slag. In the reduction step, the molten metal and the slag generated by reducing the oxide ore are separated by gravity separation. In the reduction step, ln some embodiments the mixture is heated such that the temperatures of the metal and the slag obtained in the reduction furnace are each in the range of 1300-1700 °C.

IPC Classes  ?

  • C22B 23/02 - Obtaining nickel or cobalt by dry processes
  • C21B 13/00 - Making spongy iron or liquid steel, by direct processes
  • C22B 5/10 - Dry processes by solid carbonaceous reducing agents
  • C22C 33/04 - Making ferrous alloys by melting

39.

METHOD OF PRODUCING POSITIVE ELECTRODE MATERIAL FOR LITHIUM-ION SECONDARY BATTERIES

      
Document Number 03052009
Status In Force
Filing Date 2019-08-14
Open to Public Date 2020-02-23
Grant Date 2022-08-09
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Nozoe, Tsutomu
  • Yamaya, Ryuuta

Abstract

A method of producing a positive electrode material for lithium-ion secondary batteries, which includes a pyrolyzed carbon coating, the method including a heat treatment step of thermally decomposing an organic compound using a rotary kiln to form a pyrolyzed carbon coating, wherein the organic compound is a carbon source that forms the pyrolyzed carbon coating of a positive electrode material.

IPC Classes  ?

  • H01M 4/1393 - Processes of manufacture of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
  • H01M 4/133 - Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
  • H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries

40.

CATHODE MATERIAL INCLUDING AGGLOMERATED PARTICLES, ELECTRODE INCLUDING THE CATHODE MATERIAL, AND LITHIUM ION SECONDARY BATTERY INCLUDING THE ELECTRODE

      
Document Number 03034495
Status In Force
Filing Date 2019-02-21
Open to Public Date 2020-02-21
Grant Date 2021-07-13
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Yamaya, Ryuuta
  • Nozoe, Tsutomu

Abstract

A cathode material for a lithium ion secondary battery including agglomerated particles formed by agglomeration of a plurality of primary particles of a cathode active material represented by General Formula (1) which are coated with a carbonaceous film, in which an amount of carbon per a crystallite diameter of the cathode active material is 0.008% by mass/nm or more and 0.050% by mass/nm or less, and a peak intensity ratio (ID/1G) between a D band and a G band in a Raman spectrum obtained by Raman spectrometry is 0.85 or more and 1.15 or less. Li x A y D z PO4 (1) (Here, A represents at least one element selected from the group consisting of Co, Mn, Ni, Fe, Cu, and Cr, D represents at least one element selected from the group consisting of Mg, Ca, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, Sc, and Y, 0.9

IPC Classes  ?

  • H01M 4/136 - Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
  • H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries

41.

METHOD FOR SEPARATING COPPER FROM NICKEL AND COBALT

      
Document Number 03103645
Status In Force
Filing Date 2019-06-21
Open to Public Date 2020-01-02
Grant Date 2024-01-16
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Higaki, Tatsuya
  • Takenouchi, Hiroshi
  • Kobayashi, Hiroshi

Abstract

Provided is a method for efficiently separating copper from nickel and cobalt from a sulfide containing nickel and cobalt together with copper. The present invention is a method for separating copper from nickel and cobalt, the method comprising pulverizing a sulfide containing copper and nickel and cobalt into a predetermined size and then stirring the resultant product under the condition having an oxidation-reduction potential (a reference electrode: a silver/silver chloride electrode) of less than 100 mV using an acid solution to perform a leaching treatment. In this separation method, a leach liquor in which nickel and cobalt are leached and a leach residue containing copper sulfate are produced as the result of the leaching treatment.

IPC Classes  ?

  • C22B 23/00 - Obtaining nickel or cobalt
  • C22B 3/08 - Sulfuric acid
  • C22B 3/10 - Hydrochloric acid
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof

42.

COMPOSITE TUNGSTEN OXIDE FILM AND METHOD FOR PRODUCING SAME, AND FILM-DEPOSITED BASE MATERIAL AND ARTICLE EACH PROVIDED WITH SAID FILM

      
Document Number 03099470
Status Pending
Filing Date 2019-04-17
Open to Public Date 2019-11-14
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Sato, Keiichi
  • Ando, Isao

Abstract

Provided are: a composite tungsten film which has both of transparency in a visible light region and infrared ray absorbability in an infrared ray region, also has substantial radio wave permeability, and also has a function to absorb light to block the light, a function to absorb light to generate heat and a function to absorb light to emit electrons as well as permeability for light having a wavelength of 700 to 1200 nm; and a method for producing the composite tungsten film. Also provided is a film-formed substrate or article utilizing one function or multiple functions among the above-mentioned functions. A composite tungsten oxide film of which the main component has a chemical composition represented by the general formula: MxWyOz (wherein M represents at least one element selected from an alkali metal, an alkaline earth metal, Fe, In, Tl and Sn; W represents tungsten; and O represents oxygen), wherein the formulae: 0.001 = x/y = 1 and 2.2 = z/y = 3.0 are satisfied, substantially no organic substance component is contained, the sheet resistance is 105 O/? or more, the permeability at a wavelength of 550 nm is 50% or more, the permeability at a wavelength of 1400 nm is 30% or less, the absorptance at a wavelength of 1400 nm is 35% or more, and the absorptance at a wavelength of 800 nm relative to the absorptance at a wavelength of 1400 nm is 80% or less.

IPC Classes  ?

  • C23C 14/06 - Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
  • C01G 41/00 - Compounds of tungsten
  • C03C 17/245 - Oxides by deposition from the vapour phase
  • C23C 14/34 - Sputtering
  • C23C 14/58 - After-treatment

43.

METHOD FOR PRODUCING PRECURSOR OF LITHIUM ADSORBENT

      
Document Number 03087389
Status Pending
Filing Date 2019-04-17
Open to Public Date 2019-10-24
Owner
  • SUMITOMO METAL MINING CO., LTD. (Japan)
  • THE UNIVERSITY OF KITAKYUSHU (Japan)
Inventor
  • Takano, Masatoshi
  • Matsumoto, Shin-Ya
  • Ikeda, Osamu
  • Kudo, Yohei
  • Asano, Satoshi
  • Yoshizuka, Kazuharu
  • Nishihama, Syouhei

Abstract

Provided is a method for producing lithium manganate as a lithium adsorbent precursor at atmospheric pressure. The method for producing a lithium adsorbent precursor comprises the following steps (1) to (3): (1) a first mixing step: a step of obtaining a first slurry containing manganese hydroxide by mixing a manganese salt with an alkali hydroxide; (2) a second mixing step: a step of obtaining a second slurry by adding lithium hydroxide to the first slurry and mixing; and (3) an oxidation step: a step of obtaining a lithium adsorbent precursor by adding an oxidizing agent to the second slurry. The method for producing a lithium adsorbent precursor comprises these steps to enable production of a lithium adsorbent precursor at atmospheric pressure. This enables the production of a lithium adsorbent precursor while restraining costs.

IPC Classes  ?

  • B01J 20/06 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group
  • B01J 20/30 - Processes for preparing, regenerating or reactivating
  • C01G 45/00 - Compounds of manganese

44.

AIR BUBBLE MEASUREMENT DEVICE AND AIR BUBBLE MEASUREMENT METHOD

      
Document Number 03093896
Status In Force
Filing Date 2019-03-26
Open to Public Date 2019-10-03
Grant Date 2023-08-22
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor Ishikawa, Shintaro

Abstract

Provided is an air bubble measuring device capable of accurately understanding the conditions of air bubbles in a liquid even when the size of the air bubbles is small. An air bubble measuring device (10) measures air bubbles moving in a liquid. The air bubble measuring device (10) is provided with a measurement chamber (11) that holds a liquid (W). The measurement chamber (11) is provided with: an introduction port (27a) for introducing air bubbles in the liquid (W) from a lower side; and a transparent inclined surface that is inclined downward and provided at a position at which air bubbles present in the liquid (W) rise. A hydrophilic membrane (23b) having a contact angle with water of 20 degrees or less is provided to this transparent inclined surface. Through this configuration, adherence of air bubbles to the transparent inclined surface can be prevented even when the air bubbles have become small. As a result, air bubbles remaining at the transparent inclined surface can be prevented, and the condition of the air bubbles, namely, the size and quantity of the air bubbles can be accurately measured.

IPC Classes  ?

45.

SOLVENT EXTRACTION METHOD

      
Document Number 03089549
Status In Force
Filing Date 2018-11-21
Open to Public Date 2019-09-19
Grant Date 2022-09-27
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Ohara, Hideki
  • Asano, Satoshi
  • Kobayashi, Hiroshi
  • Takano, Masatoshi
  • Sanjo, Shota

Abstract

Provided is a solvent extraction method that allows selectively separating magnesium from an acidic aqueous solution of sulfuric acid. The solvent extraction method includes: bringing an acidic aqueous solution of sulfuric acid containing nickel, cobalt, and magnesium in contact with an organic solvent to extract the magnesium into the organic solvent; and using the organic solvent produced by diluting an extractant made of alkylphosphonic acid ester with a diluent. A concentration of the extractant is set to 40 volume% or more and 60 volume% or less and a pH of the acidic aqueous solution of sulfuric acid is set to 1.5 or more and 2.0 or less, or the concentration of the extractant is set to 20 volume% or more and 50 volume% or less and the pH of the acidic aqueous solution of sulfuric acid is set to 2.0 or more and 2.5 or less.

IPC Classes  ?

  • C22B 26/22 - Obtaining magnesium
  • B01D 11/04 - Solvent extraction of solutions which are liquid
  • C22B 3/38 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus

46.

METHOD FOR PRODUCING NI/CO SULFIDE AND SYSTEM FOR STABILIZING IRON GRADE

      
Document Number 03093223
Status Pending
Filing Date 2019-03-07
Open to Public Date 2019-09-12
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Suzuki, Yukinori
  • Saito, Daisuke
  • Oishi, Takao

Abstract

Provided is a method for increasing Ni yield of a sulfide product and lowering iron grade F. This method comprises: step (S10) for subjecting a Ni/Co-containing aqueous sulfuric acid solution (1) to a sulfurization reaction with H2S gas (2); step (S20) for recovering Ni/Co in the state of sulfide; step (S30) for recovering the H2S gas (2) as an aqueous NaHS solution (5); and step (S40) for adding the aqueous NaHS solution (5) to the aqueous sulfuric acid solution (1). The sulfurization reaction step (S10) further comprises: first reaction step (S11) for subjecting the aqueous sulfuric acid solution (1) to the sulfurization reaction with the H2S gas (2); and second reaction step (S12) for subjecting the aqueous sulfuric acid solution (1) to a sulfurization reaction with the aqueous NaHS solution (5). In step (S40) for controlling the addition amount of the aqueous NaHS solution, the management index (W), which is defined as W=X/Y, satisfy the requirement: W = 0.15 vol% [wherein X represents the addition flow rate of the aqueous NaHS solution (5) and Y represents the flow rate of the aqueous sulfuric acid solution (1) supplied in second reaction step (S12)].

IPC Classes  ?

  • C01G 53/00 - Compounds of nickel
  • C22B 3/08 - Sulfuric acid
  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
  • C22B 23/00 - Obtaining nickel or cobalt

47.

ELECTRODE MATERIAL FOR LITHIUM ION BATTERY AND LITHIUM ION BATTERY

      
Document Number 03018852
Status In Force
Filing Date 2018-09-26
Open to Public Date 2019-08-15
Grant Date 2020-06-02
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Oshitari, Satoru
  • Oyama, Masataka
  • Yamaya, Ryuuta

Abstract

To provide an electrode material for a lithium ion battery capable of decreasing a metal elution amount even when an electrode active material having a large specific surface area is used as the electrode material and capable of obtaining a lithium ion battery in which a decrease in a capacity caused by storage at a high temperature in a fully charged state is suppressed and a lithium ion battery. [Means for Resolution] An electrode material for a lithium ion battery including electrode active material particles and a carbonaceous film that coats surfaces of the electrode active material particles, in which a tap density is 0.95 g/cm3 or more and 1.6 g/cm3 or less, and a volume ratio of micro pores to a total volume that is evaluated from nitrogen adsorption measurement is 1.5% or more and 2.5% or less.

IPC Classes  ?

  • H01M 4/136 - Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
  • H01M 4/1397 - Processes of manufacture of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
  • H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries

48.

METHOD FOR PRODUCING HIGH-PURITY SCANDIUM OXIDE

      
Document Number 03088357
Status In Force
Filing Date 2019-01-23
Open to Public Date 2019-08-01
Grant Date 2021-03-30
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Higaki, Tatsuya
  • Kobayashi, Hiroshi

Abstract

Provided is a method for obtaining high-purity scandium oxide efficiently from a solution containing scandium. The method for producing high-purity scandium oxide of the present invention has a first firing step S12 for subjecting a solution containing scandium to oxalation treatment using oxalic acid and firing the obtained crystals of scandium oxalate at a temperature of 400 to 600°C, inclusive, a dissolution step S13 for dissolving the scandium compound obtained by firing in one or more solutions selected from hydrochloric acid and nitric acid to obtain a solution, a reprecipitation step S14 for subjecting the solution to oxalation treatment using oxalic acid and generating a reprecipitate of scandium oxalate, and a second firing step S15 for firing the reprecipitate of obtained scandium oxalate to obtain scandium oxide.

IPC Classes  ?

  • C01F 17/00 - Compounds of rare earth metals
  • C22B 1/02 - Roasting processes
  • C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
  • C22B 3/10 - Hydrochloric acid
  • C22B 59/00 - Obtaining rare earth metals

49.

METHOD FOR SEPARATING COPPER, AND NICKEL AND COBALT

      
Document Number 03086627
Status In Force
Filing Date 2018-11-28
Open to Public Date 2019-06-27
Grant Date 2023-03-28
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Takenouchi, Hiroshi
  • Kobayashi, Hiroshi
  • Shoji, Hirofumi
  • Higaki, Tatsuya

Abstract

Provided is a method for separating copper from nickel and cobalt, which can efficiently and selectively separate copper from nickel and cobalt in a substance containing copper, nickel, and cobalt in a waste lithium ion battery, etc. In this method for separating copper from nickel and cobalt, a substance containing copper, nickel, and cobalt is sulfurated to obtain a sulfide, the obtained sulfide that contains copper, nickel, and cobalt is brought into contact with an acid solution to obtain a solid containing copper and a leachate containing nickel and cobalt. Here, the sulfide preferably contains copper sulfide as a main component, and contains nickel metal and cobalt metal. In addition, when bringing the sulfide into contact with the acid solution, the added amounts of the sulfide and the acid solution are preferably adjusted such that the oxidation-reduction potential of the obtained leachate is maintained at 150 mV or less where a silver/silver chloride electrode is a reference electrode.

IPC Classes  ?

  • C22B 23/00 - Obtaining nickel or cobalt
  • C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
  • C22B 3/08 - Sulfuric acid
  • C22B 3/10 - Hydrochloric acid
  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • C22B 15/00 - Obtaining copper

50.

METHOD FOR TREATING LITHIUM ION BATTERY WASTE

      
Document Number 03075424
Status In Force
Filing Date 2018-10-22
Open to Public Date 2019-05-31
Grant Date 2022-09-20
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Takeda, Kenji
  • Asano, Satoshi

Abstract

The present application provides a method whereby lithium ion battery waste more efficiently and stably treated while reducing loss in the collection of valuable metal, e.g., nickel and copper, from the lithium ion battery waste utilizing a treatment in a copper smelting process. The method is for treating a lithium ion battery waste using a converter furnace in a copper smelting process, wherein, prior to a treatment for charging a copper mat produced in a flash smelter in the copper smelting process into a converter furnace and blowing oxygen into the converter furnace to produce crude copper, the lithium ion battery waste is introduced into the converter furnace or a ladle that is used for the charging of the copper mat into the converter furnace and then the lithium ion battery waste is burned with residual heat in the converter furnace or the ladle.

IPC Classes  ?

  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • B09B 3/40 - Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
  • C22B 15/06 - Obtaining copper in converters
  • H01M 10/54 - Reclaiming serviceable parts of waste accumulators

51.

METHOD FOR TREATING LITHIUM ION BATTERY WASTE

      
Document Number 03083379
Status In Force
Filing Date 2018-10-22
Open to Public Date 2019-05-31
Grant Date 2022-09-27
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Takenouchi, Hiroshi
  • Asano, Satoshi
  • Tan, Toshirou
  • Kobayashi, Hiroshi
  • Takeda, Kenji

Abstract

Provided is a treatment method whereby it becomes possible to recovery copper, nickel and cobalt, which are valuable metals, contained in a lithium ion battery waste and to separate copper, nickel and cobalt from one another effectively. A method for treating a lithium ion battery waste according to the present invention includes: an alloy production step S1 of introducing the lithium ion battery waste into a furnace and then melting the lithium ion battery waste by heating, thereby producing an alloy containing copper, nickel and cobalt; and an electrolytic purification step S2 of subjecting the alloy to such an electrolytic treatment that the alloy is charged as an anode into a sulfuric acid solution and then electricity is conducted between the anode and a cathode to electrodeposit copper contained in the alloy onto the cathode, thereby separating nickel and cobalt from each other.

IPC Classes  ?

  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • C22B 15/00 - Obtaining copper
  • C22B 23/00 - Obtaining nickel or cobalt
  • C25C 1/12 - Electrolytic production, recovery or refining of metals by electrolysis of solutions of copper

52.

METHOD FOR SEPARATING COPPER, NICKEL, AND COBALT

      
Document Number 03076598
Status In Force
Filing Date 2018-09-11
Open to Public Date 2019-05-02
Grant Date 2021-04-20
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Higaki, Tatsuya
  • Takenouchi, Hiroshi
  • Kobayashi, Hiroshi
  • Asano, Satoshi

Abstract

Provided is a method for separating copper, nickel, and cobalt, the method being capable of efficiently and selectively separating copper, nickel, and cobalt from alloys containing copper, nickel, and cobalt, such as highly corrosive alloys containing copper, nickel, and cobalt obtained by dry-processing used lithium ion batteries. The alloy containing copper, nickel, and cobalt is brought into contact with nitric acid in the co-presence of a sulfiding agent to obtain a solid containing copper and a leachate containing nickel and cobalt.

IPC Classes  ?

  • C22B 23/00 - Obtaining nickel or cobalt
  • C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof

53.

METHOD FOR SEPARATING COPPER FROM NICKEL AND COBALT

      
Document Number 03077604
Status In Force
Filing Date 2018-09-11
Open to Public Date 2019-05-02
Grant Date 2023-02-28
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Higaki, Tatsuya
  • Takenouchi, Hiroshi
  • Kobayashi, Hiroshi
  • Asano, Satoshi

Abstract

Provided is a method for separating copper from nickel and cobalt with which it is possible to selectively and efficiently separate copper, as well as nickel and cobalt, from an alloy including copper, nickel, and cobalt such as an alloy having high corrosion resistance that includes copper, nickel, and cobalt obtained by dry treatment of waste lithium ion cells. An alloy including copper, nickel, and cobalt is brought into contact with sulfuric acid in the joint presence of a sulfurizing agent, and a solid containing copper and a leachate containing nickel and cobalt are obtained.

IPC Classes  ?

  • C22B 23/00 - Obtaining nickel or cobalt
  • C22B 3/08 - Sulfuric acid
  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof

54.

METHOD FOR SEPARATING COPPER FROM NICKEL AND COBALT

      
Document Number 03072317
Status In Force
Filing Date 2018-08-21
Open to Public Date 2019-04-04
Grant Date 2023-07-25
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Higaki, Tatsuya
  • Takenouchi, Hiroshi
  • Kobayashi, Hiroshi
  • Asano, Satoshi

Abstract

Provided is a method for separating copper from nickel and cobalt, which is capable of efficiently and selectively separating copper, and nickel and cobalt from an alloy containing copper, nickel and cobalt such as a highly anticorrosive alloy that is obtained by subjecting a waste lithium ion battery to a dry treatment and contains copper, nickel and cobalt. According to the present invention, an alloy containing copper, nickel and cobalt is brought into contact with an acid in the coexistence of a sulfurization agent, thereby obtaining a solid that contains copper and a leachate that contains nickel and cobalt.

IPC Classes  ?

  • C22B 23/00 - Obtaining nickel or cobalt
  • C22B 3/10 - Hydrochloric acid
  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof

55.

LIGHT TO HEAT CONVERSION LAYER, DONOR SHEET USING LIGHT TO HEAT CONVERSION LAYER, AND METHOD FOR PRODUCING LIGHT TO HEAT CONVERSION LAYER

      
Document Number 03086138
Status Pending
Filing Date 2018-09-14
Open to Public Date 2019-03-21
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Tsunematsu, Hirofumi
  • Chonan, Takeshi

Abstract

Provided is a photothermal conversion layer which transmits visible light, has sufficient infrared-ray absorbing properties, is capable of improving organic electroluminescent element transfer accuracy using laser beam irradiation, and is applicable to a broad range of fields such as electronics, medicine, agriculture, machinery, and the like. Also provided is a donor sheet using said photothermal conversion layer. The provided photothermal conversion layer contains infrared ray-absorbing particles and a binder component. The infrared ray-absorbing particles are composite tungsten oxide fine particles which contain a hexagonal crystal structure. The a axis of the lattice constant of the composite tungsten oxide fine particles is 7.3850-7.4186 Å, inclusive, and the c axis thereof is 7.5600-7.6240 Å, inclusive. The particle diameter of the composite tungsten oxide fine particles is 100nm or less, and the solar transmittance thereof is 45% or less.

IPC Classes  ?

  • C09K 5/14 - Solid materials, e.g. powdery or granular
  • G02B 1/02 - Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of crystals, e.g. rock-salt, semiconductors
  • H01L 31/0296 - Inorganic materials including, apart from doping material or other impurities, only AIIBVI compounds, e.g. CdS, ZnS, HgCdTe

56.

CATHODE MATERIAL USING ACTIVE PARTICLES IN A VISCOSITY-CONTROLLED PASTE,CATHODE USING THIS MATERIAL, AND LITHIUM-ION SECONDARY BATTERY USING THIS CATHODE

      
Document Number 02999570
Status In Force
Filing Date 2018-03-28
Open to Public Date 2019-03-08
Grant Date 2021-11-09
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Yamaya, Ryuuta
  • Murata, Susumu

Abstract

A cathode material for a lithium-ion secondary battery including: active material particles including central particles represented by general formula LixAyDzPO4 (here, A represents at least one element selected from the group consisting of Co, Mn, Ni, Fe, Cu, and Cr, D represents at least one element selected from the group consisting of Mg, Ca, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, Sc, and Y, 0.9

IPC Classes  ?

  • H01M 4/136 - Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
  • H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries

57.

INFRARED ABSORBING FINE PARTICLE DISPERSED POWDER, DISPERSION LIQUID CONTAINING INFRARED ABSORBING FINE PARTICLE DISPERSED POWDER, INK CONTAINING INFRARED ABSORBING FINE PARTICLE DISPERSED POWDER, AND ANTI-COUNTERFEIT INK, AND ANTI-COUNTERFEIT PRINTED MATTER

      
Document Number 03085139
Status Pending
Filing Date 2018-07-23
Open to Public Date 2019-01-31
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Tsunematsu, Hirofumi
  • Chonan, Takeshi

Abstract

Provided are: an infrared absorbing fine particle dispersion powder which exhibits transparency in the visible light region, while having excellent infrared absorption characteristics and excellent chemical resistance; a dispersion liquid containing an infrared absorbing fine particle dispersion powder; an ink containing an infrared absorbing fine particle dispersion powder; an anti-counterfeit ink; and a printed matter for anti-counterfeiting. The present invention provides an infrared absorbing fine particle dispersion powder which has an average particle diameter of 1 µm or more, and which is configured of particles that are formed from a solid medium in which infrared absorbing fine particles are dispersed.

IPC Classes  ?

  • C09C 3/10 - Treatment with macromolecular organic compounds
  • B42D 25/382 - Special inks absorbing or reflecting infrared light
  • C09D 11/037 - Printing inks characterised by features other than the chemical nature of the binder characterised by the pigment
  • C09D 11/101 - Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
  • C09D 11/50 - Sympathetic, colour-changing or similar inks
  • B41M 3/14 - Security printing
  • C01B 35/18 - Compounds containing three or more boron atoms, e.g. NaB3H8, MgB10Br10
  • C01G 41/00 - Compounds of tungsten
  • C01G 41/02 - Oxides; Hydroxides
  • C09C 1/00 - Treatment of specific inorganic materials other than fibrous fillers ; Preparation of carbon black
  • C09D 17/00 - Pigment pastes, e.g. for mixing in paints
  • C09K 3/00 - Materials not provided for elsewhere

58.

PULVERIZED MASTERBATCH PRODUCTS CONTAINING INFRARED ABSORBING FINE PARTICLES, DISPERSION LIQUID CONTAINING PULVERIZED MASTERBATCH PRODUCTS CONTAINING INFRARED ABSORBING FINE PARTICLES, INK CONTAINING INFRARED ABSORBING MATERIAL, AND ANTI-COUNTERFEIT INK AND ANTI-COUNTERFEIT PRINTED MATTER USING THEM, AND METHOD FOR PRODUCING THE PULVERIZED MASTERBATCH...

      
Document Number 03086897
Status Pending
Filing Date 2018-07-23
Open to Public Date 2019-01-31
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Tsunematsu, Hirofumi
  • Chonan, Takeshi

Abstract

Provided are: an infrared-absorbing-fine-particle-containing masterbatch pulverized product that exhibits excellent infrared-absorbing properties and that exhibits excellent chemical resistance; a dispersion containing said infrared-absorbing-fine-particle-containing masterbatch pulverized product; an infrared-absorbing-material-containing ink; an anti-counterfeiting ink employing the aforementioned materials; an anti-counterfeiting printed product; and a method for manufacturing the infrared-absorbing-fine-particle-containing masterbatch pulverized product. The present invention provides an infrared-absorbing-fine-particle-containing masterbatch pulverized product in which the dispersed particle diameter is 1 µm or greater and that contains a resin in which infrared-absorbing fine particles are dispersed in the interior thereof.

IPC Classes  ?

  • C08J 3/22 - Compounding polymers with additives, e.g. colouring using masterbatch techniques
  • C09D 11/50 - Sympathetic, colour-changing or similar inks
  • C08K 3/22 - Oxides; Hydroxides of metals
  • C08L 101/00 - Compositions of unspecified macromolecular compounds
  • B41M 3/14 - Security printing

59.

MINERAL PROCESSING METHOD

      
Document Number 03037680
Status In Force
Filing Date 2018-06-01
Open to Public Date 2019-01-10
Grant Date 2019-11-26
Owner
  • KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION (Japan)
  • SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Hirajima, Tsuyoshi
  • Miki, Hajime
  • Gde, Pandhe Wisnu Suyantara
  • Imaizumi, Yuji
  • Aoki, Yuji
  • Takida, Eri

Abstract

Provided is an ore dressing method capable of efficiently separating copper ore from molybdenum ore. The ore dressing method is provided with: a conditioning step for adding a sulfite as a surface treatment agent to an ore slurry comprising copper ore and molybdenum ore; and after the conditioning step, an ore flotation step for performing ore flotation using the ore slurry. By selectively increasing the hydrophilicity of the copper ore with the sulfite, it is possible to impart a difference in hydrophilicity between the copper ore and the molybdenum ore. As a result, it is possible to selectively cause the molybdenum ore to float and to separate the copper ore from the molybdenum ore efficiently.

IPC Classes  ?

60.

CATHODE PLATE FOR METAL ELECTRODEPOSITION AND MANUFACTURING METHOD FOR SAME

      
Document Number 03064525
Status In Force
Filing Date 2018-03-29
Open to Public Date 2018-12-06
Grant Date 2020-03-24
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Watanabe, Hiroto
  • Matsuoka, Itsumi
  • Senba, Yusuke
  • Kobayashi, Hiroshi

Abstract

Provided are: a cathode plate for metal electrodeposition which makes it less likely to lose a non-conductive film on a metal plate, which can be used repeatedly, and for which maintenance is easy even if a non-conductive film is lost; and a manufacturing method for such cathode plate. This cathode plate 1 includes a metal plate 2 on which a plurality of disk-shaped protrusions 2a are arranged, and a non-conductive film 3 formed in flat sections 2b which are sections of the metal plate 2 other than the protrusions 2a. The protrusions 2a each have a side face that has a shape formed of a substantially vertical section 2d and an inclined section 2e. A height L1 of each protrusion 2a is 50µm to 1000µm, and when an intersection of the side face of the protrusion and a vertical line that is vertically lowered from a position X that is 20µm outward from the outer peripheral edge of the protrusion is defined as Y, then a length L2 from X to Y is at least 40µm but not more than 0.8×L1µm.

IPC Classes  ?

  • C25C 7/02 - Electrodes; Connections thereof
  • C23F 1/02 - Local etching
  • C25C 1/08 - Electrolytic production, recovery or refining of metals by electrolysis of solutions of iron group metals, refractory metals or manganese of nickel or cobalt
  • C25D 17/12 - Shape or form

61.

ACTIVE LITHIUM-ION CATHODE MATERIAL WITH IMPROVED PARTICLE SIZE DISTRIBUTION, CATHODE USING THIS MATERIAL, AND BATTERY USING THIS CATHODE

      
Document Number 02979499
Status In Force
Filing Date 2017-09-19
Open to Public Date 2018-08-14
Grant Date 2019-03-26
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Yamaka, Ryuuta
  • Oyama, Masataka

Abstract

A cathode material for a lithium-ion secondary battery of the present invention is active material particles including central particles represented by General Formula Li x A y D z PO4 (0.9

IPC Classes  ?

  • H01M 4/136 - Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy

62.

METHOD FOR PRODUCING SOLUTIONS CONTAINING NICKEL OR COBALT

      
Document Number 03035740
Status In Force
Filing Date 2017-09-01
Open to Public Date 2018-03-08
Grant Date 2021-10-19
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Ohara, Hideki
  • Tan, Toshirou
  • Takano, Masatoshi
  • Asano, Satoshi
  • Kobayashi, Hiroshi

Abstract

Provided is a method for producing solutions, by which two solutions, namely a high-purity nickel sulfate solution and a mixed solution of nickel sulfate and cobalt sulfate are able to be obtained at the same time from a sulfuric acid acidic solution containing nickel, cobalt and calcium. A method for producing solutions according to the present invention uses a sulfuric acid acidic solution containing nickel, cobalt and calcium and performs a first step S1 for producing a mixed solution of nickel sulfate and cobalt sulfate from the sulfuric acid acidic solution and a second step S2 for producing a solution of nickel sulfate from the sulfuric acid acidic solution in parallel. In the first step, the sulfuric acid acidic solution is subjected to solvent extraction by means of an extractant, thereby obtaining a first organic solvent after extraction containing calcium and a first extraction residue containing nickel and cobalt. In the second step, the sulfuric acid acidic solution is subjected to solvent extraction by means of an extractant, thereby obtaining a second organic solvent after extraction containing cobalt and calcium and a second extraction residue containing nickel.

IPC Classes  ?

  • C01G 53/10 - Sulfates
  • C01G 51/10 - Sulfates
  • C22B 3/38 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus

63.

METAL ELECTRODEPOSITION CATHODE PLATE AND PRODUCTION METHOD THEREFOR

      
Document Number 03030941
Status In Force
Filing Date 2017-07-10
Open to Public Date 2018-01-25
Grant Date 2020-12-15
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Watanabe, Hiroto
  • Matsuoka, Itsumi
  • Senba, Yusuke
  • Kobayashi, Hiroshi

Abstract

Provided are a metal electrodeposition cathode plate, the non-conductive film of which is not susceptible to failure and which can be used repeatedly, and a production method therefor. This cathode plate 1 comprises a metal plate 2 on which multiple disc-shaped protrusions 2a are disposed, and a non-conductive film 3 formed on the non-protrusion-2a flat areas 2b of the metal plate 2. The minimum film thickness Y of the non-conductive film 3 at positions between the centers of adjacent protrusions 2a is the same or greater than the height X of the protrusions 2a. It is preferred that the height X of the protrusions 2a is 50 µm to 1000 µm.

IPC Classes  ?

  • C25C 7/02 - Electrodes; Connections thereof
  • C25C 1/08 - Electrolytic production, recovery or refining of metals by electrolysis of solutions of iron group metals, refractory metals or manganese of nickel or cobalt
  • C25C 7/08 - Separating of deposited metals from the cathode
  • C25D 17/12 - Shape or form

64.

OXIDE ORE SMELTING METHOD

      
Document Number 03021829
Status In Force
Filing Date 2017-04-26
Open to Public Date 2017-11-02
Grant Date 2023-02-21
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Iseki, Takashi
  • Goda, Yukihiro
  • Kobayashi, Jun-Ichi
  • Okada, Shuji

Abstract

Disclosed are oxide ore smelting methods for producing ferronickel by reducing a mixture containing a nickel oxide ore. Selected methods employ mixing of the nickel oxide ore and a carbonaceous reducing agent with molding and cutting of the mixture into a pellet. In the reducing step nickel oxide and iron oxide contained in the pellet are metallized to form a shell on the pellet surface with a slag of a liquid phase generated from slag components in the pellet.

IPC Classes  ?

  • C22B 1/242 - Binding; Briquetting with binders
  • C21B 13/08 - Making spongy iron or liquid steel, by direct processes in rotary furnaces
  • C22B 5/10 - Dry processes by solid carbonaceous reducing agents
  • C22B 23/02 - Obtaining nickel or cobalt by dry processes

65.

OXIDE ORE SMELTING METHOD

      
Document Number 03110511
Status In Force
Filing Date 2017-04-26
Open to Public Date 2017-11-02
Grant Date 2023-01-31
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Okada, Shuji
  • Iseki, Takashi
  • Goda, Yukihiro
  • Kobayashi, Jun-Ichi

Abstract

ABSTRACT The present invention addresses the problem, in methods for producing a metal or alloy by reducing a mixture that contains an oxide ore, of providing an oxide ore smelting method with good productivity and efficiency. The present invention is an oxide ore smelting method for producing a metal or alloy by reducing a mixture that contains an oxide ore, the method comprising at least: a mixing step S1 for mixing an oxide ore with a carbonaceous reducing agent; a mixture-molding step S2 for molding the mixture obtained to obtain a mixture-molded body; and a reducing step S3 for heating the mixture-molded body obtained at a specified reducing temperature in a reducing furnace. Date Recue/Date Received 2021-02-25

IPC Classes  ?

66.

OXIDE ORE SMELTING METHOD

      
Document Number 03110518
Status In Force
Filing Date 2017-04-26
Open to Public Date 2017-11-02
Grant Date 2023-03-14
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Okada, Shuji
  • Iseki, Takashi
  • Goda, Yukihiro
  • Kobayashi, Jun-Ichi

Abstract

Disclosed are oxide ore smelting methods for producing a metal or an alloy by reducing a mixture containing an oxide ore. Certain methods include a mixing treatment step for mixing at least the oxide ore and a carbonaceous reducing agent and a mixture-molding step for molding the mixture to obtain a mixture-molded body, followed by a reducing step for heating the mixture-molded body at a specific reducing temperature. In certain embodiments the oxide ore is nickel oxide ore for mixing with the carbonaceous reducing agent in specific proportions, and with the reducing step conducted with the mixture molded by being filled into predetermined containers. In selected embodiments a metal shell is formed on the surface of the mixture and then a ferronickel metal is allowed to precipitate at a lower part of the metal shell to separately form the ferronickel metal.

IPC Classes  ?

67.

METHOD FOR SMELTING OXIDE ORE

      
Document Number 03021181
Status In Force
Filing Date 2017-04-19
Open to Public Date 2017-10-26
Grant Date 2020-11-10
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Iseki, Takashi
  • Goda, Yukihiro
  • Kobayashi, Jun-Ichi
  • Okada, Shuji

Abstract

Provided is a smelting method for producing metal by reducing a mixture that includes an oxide ore such as nickel oxide ore, wherein it is possible to improve productivity by raising the metal recovery rate as well as to inexpensively and efficiently produce high-quality metal. The present invention is a smelting method in which: an oxide ore and a carbonaceous reducing agent are mixed; the resulting mixture is heated and subjected to a reduction treatment; and metal and slag, which are reduction products, are obtained, wherein the reduction treatment is carried out in a state in which one or more surface deposits selected from carbonaceous reducing agents, metal oxides, and oxidation inhibitors are deposited on the surface of the mixture.

IPC Classes  ?

  • C22B 1/245 - Binding; Briquetting with binders organic with carbonaceous material for the production of coked agglomerates
  • C22B 5/10 - Dry processes by solid carbonaceous reducing agents
  • C22B 23/02 - Obtaining nickel or cobalt by dry processes

68.

METHOD FOR REMOVING RESIDUAL HYDROGEN SULFIDE

      
Document Number 03011953
Status In Force
Filing Date 2017-01-11
Open to Public Date 2017-08-03
Grant Date 2021-04-27
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Fuke, Tomonao
  • Oishi, Takao

Abstract

Provided is a method for removing residual hydrogen sulfide, whereby hydrogen sulfide remaining in a reaction container can be efficiently removed in a short operation time. The method for removing residual hydrogen sulfide pertaining to the present invention comprises removing hydrogen sulfide remaining in a reaction container in which a sulfurizing agent is added to a solution and a sulfuration reaction is generated, the method wherein the solution is withdrawn from the reaction container, an amount of water corresponding to 30 vol% to 100 vol% of the total volume of the reaction container after withdrawal of the solution is added and stirred, and a replacement treatment is then performed in which the reaction container from which the water is withdrawn is filled with an inert gas.

IPC Classes  ?

  • C22B 23/00 - Obtaining nickel or cobalt
  • B01D 53/14 - Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by absorption
  • B08B 9/08 - Cleaning of containers, e.g. tanks
  • C22B 3/08 - Sulfuric acid
  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes

69.

ANTI-COUNTERFEIT INK COMPOSITION, ANTI-COUNTERFEIT INK, ANTI-COUNTERFEIT PRINTED MATTER, AND METHOD FOR PRODUCING THE ANTI-COUNTERFEIT INK COMPOSITION

      
Document Number 03009035
Status In Force
Filing Date 2016-12-19
Open to Public Date 2017-06-22
Grant Date 2023-10-17
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Tsunematsu, Hirofumi
  • Chonan, Takeshi

Abstract

Provided are a composition for anti-counterfeit ink, said composition transmitting visible light and absorbing infrared light, thereby allowing the authenticity of a printed article to be judged. Also provided are an anti-counterfeit ink and a printed article for counterfeit prevention. The present invention provides a composition for anti-counterfeit ink, said composition including ultrafine particles of a complex tungsten oxide, wherein, when the XRD peak intensity associated with a (220) surface of a silicon powder reference sample (640c, manufactured by NIST) is given a value of 1, the relative value of the XRD peak top intensity of the ultrafine particles of the complex tungsten oxide is 0.13 or greater. The present invention also provides an anti-counterfeit ink, a printed article for counterfeit prevention, and a method of producing the composition for anti-counterfeit ink.

IPC Classes  ?

70.

AQUEOUS COBALT CHLORIDE SOLUTION REFINEMENT METHOD

      
Document Number 02986557
Status In Force
Filing Date 2016-05-20
Open to Public Date 2016-12-08
Grant Date 2022-10-04
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Ohara, Hideki
  • Asano, Satoshi
  • Takano, Masatoshi
  • Tan, Toshirou

Abstract

Disclosed is an aqueous cobalt chloride solution refinement method for bringing metallic nickel into contact with an aqueous solution containing cobalt chloride to remove an impurity by a cementation reaction, in which the metallic nickel is washed with an acidic liquid having a pH of not more than 2.5 before the metallic nickel is brought into contact with the aqueous solution containing cobalt chloride. Since the metallic nickel is washed with the acidic liquid having a pH of not more than 2.5, a passive film on a surface of the metallic nickel is removed. The passive film is removed from the metallic nickel, and therefore, when the metallic nickel comes in contact with the aqueous solution containing cobalt chloride, an impurity more noble than the metallic nickel can be precipitated by the cementation reaction.

IPC Classes  ?

  • C22B 23/06 - Refining
  • H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
  • C01G 51/08 - Halides
  • C22B 3/46 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes by substitution, e.g. by cementation
  • C22B 23/00 - Obtaining nickel or cobalt

71.

METHOD FOR SMELTING SAPROLITE ORE

      
Document Number 02977450
Status In Force
Filing Date 2015-12-01
Open to Public Date 2016-09-01
Grant Date 2017-12-19
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Takahashi, Junichi
  • Inoue, Taku
  • Okada, Shuuji

Abstract

Provided is a smelting method whereby a reaction for reducing pellets, said pellet being formed by using a saprolite ore as a starting material, can be effectively conducted and thus an iron/nickel alloy having a nickel grade of, for example, 16% or greater that satisfies Japanese Industrial Standards for ferronickel can be obtained. The method according to the present invention for smelting a saprolite ore, whereby an iron/nickel alloy having a nickel grade of 16% or greater can be obtained by heating and reducing pellets formed from the saprolite ore, comprises: a pellet production step (S1) for producing the pellets from the saprolite ore; and a reduction step (S2) for heating and reducing the obtained pellets in a smelting furnace. In the pellet production step (S1), at least the saprolite ore and a preset amount of a carbonaceous reducing agent are mixed together to produce the pellets. In the reduction step (S2), a hearth carbonaceous reducing agent is preliminarily spread on the hearth of the smelting furnace and the pellets produced above are placed on the hearth carbonaceous reducing agent and then subjected to a heat reduction treatment.

IPC Classes  ?

  • C22B 5/10 - Dry processes by solid carbonaceous reducing agents
  • C21B 15/00 - Other processes for the manufacture of iron from iron compounds
  • C22B 1/14 - Agglomerating; Briquetting; Binding; Granulating
  • C22B 23/02 - Obtaining nickel or cobalt by dry processes

72.

CONE VALVE

      
Document Number 02967924
Status In Force
Filing Date 2015-07-01
Open to Public Date 2016-05-26
Grant Date 2020-06-09
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Jinno, Hiroki
  • Gotou, Tetsurou
  • Ito, Tsuyoshi
  • Kitazaki, Tooru

Abstract

The purpose of the invention is to allow the lifespan of a cone valve to be extended over conventional ones even if used as a check valve when feeding slurry containing highly abrasive coarse particles. A cone valve (1) used as a check valve when feeding slurry comprises at least a valve body (11), a valve seat (13), and a spring (14) incorporated so as to bring the valve body (11) in contact with the valve seat (13). The total length of the spring (14) is less than the stroke length of the valve body (11).

IPC Classes  ?

  • F16K 15/06 - Check valves with guided rigid valve members with guided stems
  • C22B 23/00 - Obtaining nickel or cobalt

73.

NICKEL RECOVERY PROCESS

      
Document Number 02957875
Status In Force
Filing Date 2015-07-23
Open to Public Date 2016-02-18
Grant Date 2019-11-26
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Shoji, Hirofumi
  • Hayata, Jiro
  • Kudou, Keiji
  • Higaki, Tatsuya

Abstract

A nickel recovery process capable of decreasing nickel remaining in a byproduct by recovering nickel from the byproduct of electrolytic nickel manufacturing process by chlorine-leaching, and also, capable of simplifying a cementation step simultaneously, is provided. In a nickel recovery step S60, a nickel recovery step S70 and a nickel recovery step S80, nickel is recovered in each step from S0 slurry, residue flaker and chlorine-leached residue, which are byproducts of electrolytic nickel manufacturing process by chlorine-leaching, by using an aqueous solution containing 80 g/L to 390 g/L of chlorine and 30 g/L to 70 g/L of copper.

IPC Classes  ?

  • C22B 23/00 - Obtaining nickel or cobalt
  • C22B 3/04 - Extraction of metal compounds from ores or concentrates by wet processes by leaching
  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • C25C 1/08 - Electrolytic production, recovery or refining of metals by electrolysis of solutions of iron group metals, refractory metals or manganese of nickel or cobalt

74.

ION EXCHANGE RESIN AND METHOD FOR ADSORBING AND SEPARATING METAL

      
Document Number 02954605
Status In Force
Filing Date 2015-06-26
Open to Public Date 2015-12-30
Grant Date 2018-01-23
Owner
  • KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION (Japan)
  • SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Goto, Masahiro
  • Kubota, Fukiko

Abstract

Provided is a system for efficiently recovering trace metal from a large amount of a raw material, such as when trace metal is recovered from nickel oxide ore. This ion exchange resin has, on a carrier, an amide derivative represented by the following general formula. In the formula, R1 and R2 represent the same or different alkyl groups, R3 represents a hydrogen atom or an alkyl group, and R1 represents a hydrogen atom or an arbitrary group, other than an amino group, bonded to a carbon as an amino acid. The amide derivative is preferably a glycineamide derivative. The carrier preferebly includes a primary amine and/or a secondary amino.

IPC Classes  ?

  • B01J 45/00 - Ion-exchange in which a complex or a chelate is formed; Use of material as complex or chelate forming ion-exchangers; Treatment of material for improving the complex or chelate forming ion-exchange properties
  • B01J 20/22 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
  • C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
  • C22B 3/42 - Treatment or purification of solutions, e.g. obtained by leaching by ion-exchange extraction

75.

COPPER REMOVAL METHOD FOR AQUEOUS NICKEL CHLORIDE SOLUTION

      
Document Number 02943483
Status In Force
Filing Date 2015-02-10
Open to Public Date 2015-10-01
Grant Date 2019-07-30
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Yokogawa, Tomohiko
  • Nakai, Takayuki
  • Kakimoto, Minoru
  • Takaishi, Kazuyuki

Abstract

Provided is a method for removing copper from an aqueous nickel chloride solution that includes separating and recovering cobalt and removing copper, zinc, and iron, from the aqueous nickel chloride solution containing cobalt, copper, zinc, and iron, by solvent extraction using, as an organic phase, an organic solvent containing a tertiary amine as an extractant and an aromatic hydrocarbon as a diluent, the method sequentially including: an extraction step (1), a stripping step (2), and a copper recovery step. In the copper recovery step, the organic phase is contacted with water or dilute hydrochloric acid having a pH of 1 or more to strip copper.

IPC Classes  ?

76.

EXTRACTION AGENT FOR PRECIOUS METALS AND RHENIUM, AND EXTRACTION METHOD FOR PRECIOUS METALS AND RHENIUM USING SAME

      
Document Number 02903182
Status In Force
Filing Date 2014-04-08
Open to Public Date 2014-10-23
Grant Date 2016-10-04
Owner
  • KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION (Japan)
  • SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Goto, Masahiro
  • Kubota, Fukiko
  • Baba, Yuzo

Abstract

The present invention extracts precious metals from an acidic solution containing precious metals in an early and highly efficient manner. Provided is an extraction agent for precious metals that is represented by the general formula below. In the formula, R1 and R2 each represent the same alkyl group or different alkyl groups, R3 represents a hydrogen atom or an alkyl group, and R4 represents a hydrogen atom or a discretionary group that is not an amino group and that bonds to a carbon as an amino acid. It is preferable that the general formula have a glycine unit, a histidine unit, a lysine unit, an aspartic acid unit, or an N-methylglycine unit (see above formula)

IPC Classes  ?

  • C22B 11/00 - Obtaining noble metals
  • C22B 3/26 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds

77.

VALUABLE-METAL EXTRACTION METHOD

      
Document Number 02900928
Status In Force
Filing Date 2014-03-12
Open to Public Date 2014-09-25
Grant Date 2016-02-09
Owner
  • KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION (Japan)
  • SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Goto, Masahiro
  • Kubota, Fukiko
  • Baba, Yuzo

Abstract

In order to selectively extract copper and/or lead from an acidic solution containing high concentrations of manganese, etc., the valuable-metal extracting agent of the present invention is expressed by general formula (1). In the formula, R1 and R2 each represent the same or different alkyl groups, R3 represents a hydrogen atom or an alkyl group, and R4 represents a hydrogen atom or a given group, other than an amino group, that bonds with an a carbon as an amino acid. In general formula (1), the inclusion of a glycine unit, a histidine unit, a lysine unit, an asparagine acid unit, or a normal methylglycine unit is preferred. When using the extracting agent to extract copper/and lead, it is preferable that the pH of the acidic solution be adjusted to 1.0-5.5 inclusive.

IPC Classes  ?

  • C22B 3/26 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
  • C22B 13/00 - Obtaining lead
  • C22B 15/00 - Obtaining copper

78.

METHOD FOR SEPARATING IMPURITIES FROM AN ACIDIC SOLUTION CONTAINING NICKEL AND COBALT AND/OR SCANDIUM

      
Document Number 02900945
Status In Force
Filing Date 2014-03-17
Open to Public Date 2014-09-25
Grant Date 2016-08-09
Owner
  • KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION (Japan)
  • SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Goto, Masahiro
  • Kubota, Fukiko
  • Baba, Yuzo
  • Ozaki, Yoshitomo
  • Hayata, Jiro
  • Higaki, Tatsuya
  • Nagakura, Toshihiko
  • Matsumoto, Shinya

Abstract

Provided is a method for efficiently separating nickel, cobalt and/or scandium, and impurities from an acidic solution containing impurities such as manganese, iron, zinc, and aluminum. A valuable-metal extracting agent of the present invention is expressed by general formula (1). In the formula, R1 and R2 each represent the same or different alkyl groups, R3 represents a hydrogen atom or an alkyl group, and R4 represents a hydrogen atom or a given group, other than an amino group, that bonds with an a carbon as an amino acid. In general formula (1), the inclusion of a glycine unit, a histidine unit, a lysine unit, an asparagine acid unit, or a normal methylglycine unit is preferred. (see above formula)

IPC Classes  ?

  • C22B 3/26 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
  • C22B 23/00 - Obtaining nickel or cobalt
  • C22B 59/00 - Obtaining rare earth metals

79.

HYDROMETALLURGICAL PROCESS FOR NICKEL OXIDE ORE

      
Document Number 02907519
Status In Force
Filing Date 2014-01-23
Open to Public Date 2014-09-25
Grant Date 2016-07-26
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Sato, Yoshiteru
  • Nishikawa, Isao
  • Higuchi, Hirotaka
  • Sugita, Izumi
  • Nakano, Osamu

Abstract

Provided is a hydrometallurgical process for nickel oxide ore by high pressure acid leach, wherein a high iron oxidation ratio is achieved to fix a large part of iron to a leach residue in the form of hematite, the amount of sulfuric acid used at the time of leaching is reduced, and nickel and cobalt are leached out at a high leaching rate. The carbon grade in ore slurry prepared in a first step and the flow rate thereof are measured to determine the amount of carbon to be fed in a second step, and then, in the second step in which sulfuric acid is added to apply a leaching treatment using high pressure air and high pressure vapor, the blowing ratio of high pressure air and high pressure oxygen is adjusted so as to attain an oxygen purity of 21% to 60%, and, while the oxygen purity is maintained, an oxygen blowing amount per weight of carbon which is contained in the ore slurry and fed in the second step is adjusted to 200 to 600 Nm3, whereby ORP (Ag/AgCl basis) in the leaching treatment is controlled to 400 to 650 mV.

IPC Classes  ?

  • C22B 23/00 - Obtaining nickel or cobalt
  • C22B 3/04 - Extraction of metal compounds from ores or concentrates by wet processes by leaching

80.

METHOD FOR REMOVING IMPURITY ELEMENT OF MAGNESIUM FROM SOLUTION CONTAINING NICKEL

      
Document Number 02895486
Status In Force
Filing Date 2014-01-20
Open to Public Date 2014-07-31
Grant Date 2016-07-26
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Heguri, Shin-Ichi
  • Ozaki, Yoshitomo
  • Kudo, Keiji

Abstract

Provided is a method for removing an impurity element of magnesium including: a hydroxylation step of adding an alkali hydroxide to the nickel-containing solution in the production process to form a hydroxylated slurry; a carbonation step of adding an alkali carbonate to the hydroxylated slurry to form a carbonated slurry, and recovering nickel component from the solution; a solid-liquid separation step for the slurry thus obtained; and a neutralization step of subjecting a solution after reaction obtained by solid-liquid separation to a neutralization, and recovering an impurity element included in the nickel-containing solution in the production process.

IPC Classes  ?

81.

NICKEL EXTRACTION METHOD

      
Document Number 02890260
Status In Force
Filing Date 2013-09-06
Open to Public Date 2014-06-19
Grant Date 2016-01-19
Owner
  • KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION (Japan)
  • SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Goto, Masahiro
  • Kubota, Fukiko
  • Baba, Yuzo

Abstract

In the present invention, nickel is selectively extracted from an acidic solution that contains a high concentration of manganese. This valuable metal extraction agent is represented by the general formula. In the formula, R1 and R2 are alkyl groups that may be the same or different, R3 is a hydrogen atom or an alkyl group, and R4 is a hydrogen atom or any group, other than an amino group, bonded to an a carbon atom of an amino acid. The general formula preferably has a glycine unit, a histidine unit, a lysine unit, an aspartic acid unit or a n-methylglycine unit. When extracting nickel by using this extraction agent, it is preferable to adjust the pH of the acidic solution to 2.3 to 5.5 inclusive.

IPC Classes  ?

  • C22B 23/00 - Obtaining nickel or cobalt
  • B01D 11/04 - Solvent extraction of solutions which are liquid
  • C07C 237/06 - Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by amino groups having the carbon atoms of the carboxamide groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being acyclic and saturated having the nitrogen atoms of the carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms
  • C22B 3/26 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • H01M 10/54 - Reclaiming serviceable parts of waste accumulators

82.

SETTLING SEPARATION PROCESS FOR NEUTRALIZED SLURRY AND HYDROMETALLURGICAL PROCESS FOR NICKEL OXIDE ORE

      
Document Number 02891877
Status In Force
Filing Date 2013-07-29
Open to Public Date 2014-05-30
Grant Date 2020-03-31
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Shoji, Hirofumi
  • Higaki, Tatsuya
  • Ozaki, Yoshitomo
  • Enomoto, Manabu

Abstract

One of the purposes of the present invention is to provide a settling separation method for a neutralized slurry, said settling separation method being capable of: efficiently neutralizing a leachate obtained by leaching nickel and cobalt from a nickel oxide ore; and effectively separating and removing, while minimizing filtration failure, a neutralization sediment formed by the sedimentation of impurities. The other of the purposes thereof is to provide a wet smelting method for a nickel oxide ore, said wet smelting method employing the settling separation method. This settling separation method comprises: subjecting a leachate obtained by leaching nickel and cobalt from a nickel oxide ore to neutralization with magnesium oxide; adding a cationic flocculant to the obtained neutralized slurry; and separating and removing a neutralization sediment thus formed.

IPC Classes  ?

  • C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
  • C22B 23/00 - Obtaining nickel or cobalt

83.

METHOD FOR PRODUCING HIGH-PURITY NICKEL SULFATE

      
Document Number 02868086
Status In Force
Filing Date 2013-02-13
Open to Public Date 2013-10-03
Grant Date 2017-08-29
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Idegami, Atsushi
  • Ozaki, Yoshitomo
  • Heguri, Shin-Ichi
  • Kudou, Keiji
  • Ohara, Hideki
  • Matsumoto, Shinya

Abstract

Provided is a method for producing nickel sulfate yielding high-purity nickel sulfate using a method for removing an impurity element to selectively remove Mg from a solution containing Ni. A process for producing nickel sulfate from an acidic solution containing Ni is characterized in that a solution containing Ni is treated sequentially in steps (1) to (3): (1) a carbonation step for adding a carbonating agent to a solution containing Ni, forming the Ni contained in the Ni-containing solution into a precipitate of nickel carbonate or a mixture comprising nickel carbonate and nickel hydroxide, and producing a carbonated slurry comprising this precipitate and carbonated solution; (2) a solid-liquid separation step for separating the carbonated slurry produced in the carbonation step (1) into the precipitate and carbonated solution; and (3) a neutralization step for adding a neutralizing agent to the carbonated solution separated through the solid-liquid separation step (2), and recovering the Ni contained in the carbonated solution as a precipitate of Ni.

IPC Classes  ?

  • C01G 53/10 - Sulfates
  • C22B 3/26 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
  • C22B 23/00 - Obtaining nickel or cobalt

84.

FLASH VESSEL AND METHOD FOR OPERATING SAME

      
Document Number 02861034
Status In Force
Filing Date 2012-12-27
Open to Public Date 2013-07-18
Grant Date 2019-08-13
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Matsubara, Satoshi
  • Nakai, Osamu
  • Kyoda, Yoji
  • Sakamoto, Takashi

Abstract

A hydrostatic tower 20 whose lower part communicates with a liquid phase space within a flash vessel 10, and whose upper part communicates with a gas phase space within the flash vessel 10 is provided. A rising liquid level within the hydrostatic tower 20 is detected by at least one maximum liquid level sensor 21A provided at a position at the same level as a predetermined maximum liquid level within the liquid phase space. A dropping liquid level within the hydrostatic tower 20 is detected by at least one minimum liquid level sensor 21B provided at a position at the same level as a predetermined minimum liquid level within the liquid phase space.

IPC Classes  ?

85.

METHOD FOR PRODUCING COBALT SULFATE

      
Document Number 02860149
Status In Force
Filing Date 2012-12-06
Open to Public Date 2013-07-04
Grant Date 2017-04-04
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Nakai, Takayuki
  • Nagase, Noriyuki
  • Heguri, Shin-Ichi

Abstract

Provided is a method for producing cobalt sulfate, wherein high purity cobalt sulfate is obtained by solvent extraction using an acidic organic extractant. Disclosed is a method in which, in Step 1, the operational pH is maintained in the range of 4.0 to 5.0 and the liquid volume ratio of organic phase/liquid phase is maintained in the range of 5.0 to 7.0; in Step 2, the operational pH is maintained in the range of 4.0 to 4.5 and the liquid volume ratio of organic phase/liquid phase is maintained in the range of 5.0 to 10.0; and in Step 3, the pH is maintained in the range of 0.5 to 1Ø

IPC Classes  ?

86.

OPERATING METHOD IN HYDROMETALLURGY OF NICKEL OXIDE ORE

      
Document Number 02859758
Status In Force
Filing Date 2012-12-14
Open to Public Date 2013-06-27
Grant Date 2020-01-21
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Ozaki, Yoshitomo
  • Takahashi, Jun-Ichi
  • Yamashita, Yu
  • Ohara, Hideki

Abstract

It is an object to provide a method for producing magnesium oxide by which magnesium oxide being high in purity and low in impurity content can be produced simply and efficiently from a sulfuric acid solution containing magnesium and calcium such as waste water. In the present invention, calcium is precipitated as calcium sulfate and separated by concentrating a sulfuric acid solution containing magnesium and calcium, and magnesium is precipitated as magnesium sulfate and separated by further concentrating the solution resulting from the separation of calcium. The separated magnesium sulfate is roasted together with a reductant, so that magnesium oxide and sulfur dioxide are obtained. The resulting magnesium oxide is washed to produce magnesium oxide with high purity.

IPC Classes  ?

  • C22B 3/08 - Sulfuric acid
  • C01F 5/12 - Magnesia by thermal decomposition of magnesium compounds by thermal decomposition of magnesium sulfate, with or without reduction
  • C22B 3/22 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means
  • C22B 3/46 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes by substitution, e.g. by cementation
  • C22B 23/00 - Obtaining nickel or cobalt
  • C22B 26/22 - Obtaining magnesium

87.

PRIMER COMPOSITION

      
Document Number 02857309
Status In Force
Filing Date 2012-11-20
Open to Public Date 2013-06-06
Grant Date 2015-11-17
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Yamabe, Hidetoshi
  • Takita, Yuka
  • Miyauchi, Kyouko

Abstract

Provided is a primer composition that is capable of forming a primer layer, which has excellent adhesiveness and film-forming performance, on the surfaces of various materials that are able to be bonded with an epoxy adhesive. A primer composition which is composed of an epoxy resin, a curing agent, a curing catalyst and an inorganic oxide filler. The epoxy resin contains at least a bisphenol A epoxy resin and a phenolic novolac epoxy resin. The curing agent is dicyandiamide, and the curing catalyst is imidazole. The inorganic oxide filler contains 0.5-3 parts by weight of fumed silica, at least the surface of which is hydrophobic and which has primary particle diameters of 7-40 nm and specific surface areas of 50-380 m2/g, relative to 100 parts by weight of the total of the epoxy resin. The primer composition does not contain a solvent.

IPC Classes  ?

  • C09D 163/02 - Polyglycidyl ethers of bis-phenols
  • C09D 5/00 - Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
  • C09D 163/04 - Epoxynovolacs

88.

METHOD FOR PRODUCING HIGH-PURITY NICKEL SULFATE

      
Document Number 02856341
Status In Force
Filing Date 2012-11-19
Open to Public Date 2013-05-30
Grant Date 2016-08-09
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Nakai, Takayuki
  • Higaki, Tatsuya
  • Ozaki, Yoshitomo

Abstract

Provided is a production method for obtaining high purity nickel sulfate having low levels of impurities, particularly low levels of magnesium and chloride, by adjusting the concentration of an extractant and the pH concentration at the time of treatment in a process of obtaining a nickel sulfate solution having a high nickel concentration by solvent extraction using an acidic organic extractant. The method includes treating an acidic solution containing nickel through at least the following steps of: a sulfurization step of adding a sulfurizing agent to the acidic solution containing nickel, and obtaining a precipitate of nickel sulfide and a solution after sulfurization; a redissolution step of preparing a slurry of the nickel sulfide obtained in the sulfurization step, adding an oxidizing agent to the slurry, and thereby obtaining a concentrated solution of nickel; a solution purification step of subjecting the concentrated solution of nickel obtained in the redissolution step to neutralization by addition of a neutralizing agent, and thereby obtaining a neutralized precipitate and a concentrated solution of nickel after iron removal thus produced; and a solvent extraction step of subjecting the concentrated solution of nickel after iron removal obtained in the solution purification step, to solvent extraction, and obtaining a stripped liquid and a nickel sulfate solution.

IPC Classes  ?

  • C22B 23/00 - Obtaining nickel or cobalt
  • C01G 53/10 - Sulfates
  • C22B 3/26 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • H01M 10/54 - Reclaiming serviceable parts of waste accumulators

89.

COBALT EXTRACTION METHOD

      
Document Number 02827601
Status In Force
Filing Date 2012-11-02
Open to Public Date 2013-05-16
Grant Date 2014-09-16
Owner
  • KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION (Japan)
  • SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Goto, Masahiro
  • Kubota, Fukiko
  • Baba, Yuzo

Abstract

The objective of the present invention is to selectively extract cobalt from an acidic solution containing a high concentration of manganese. This cobalt extraction method extracts cobalt from an acidic solution containing manganese and cobalt by subjecting the acidic solution to solvent extraction by means of a valuable metal extraction agent comprising an amide derivative represented by general formula (I). The valuable metal extraction agent is represented by the general formula. In the formula: R1 and R2 each represent the same or different alkyl group; R3 represents a hydrogen atom or an alkyl group; and R4 represents a hydrogen atom or any given group aside from an amino group bonded to the a carbon as an amino acid. Preferably, the general formula has a glycine unit, a histidine unit, a lysine unit, an aspartic acid unit, or an N-methylglycine unit. Preferably, the pH of the acidic solution is 3.5-5.5 inclusive.

IPC Classes  ?

90.

VALUABLE METAL EXTRACTION AGENT AND VALUABLE METAL EXTRACTION METHOD USING SAID EXTRACTION AGENT

      
Document Number 02827635
Status In Force
Filing Date 2012-11-02
Open to Public Date 2013-05-16
Grant Date 2014-10-14
Owner
  • KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION (Japan)
  • SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Goto, Masahiro
  • Kubota, Fukiko
  • Baba, Yuzo

Abstract

The objective of the present invention is to selectively extract light rare earth metals, and by extension, europium, from an acidic solution containing a plurality of types of rare earth metal. This valuable metal extraction agent is represented by the general formula. In the formula: R1 and R2 each indicate the same or different alkyl group; R3 indicates a hydrogen atom or an alkyl group; and R4 indicates a hydrogen atom or any given group other than an amino group bonded to the a carbon as an amino acid. Preferably, the general formula has a glycine unit, a histidine unit, a lysine unit, an aspartic acid unit, or an N-methylglycine unit. Preferably, when extracting europium using the extraction agent, the pH is adjusted into the range of 2.0-3.0 inclusive, and when selectively extracting light rare earth metals, the pH is adjusted to 1.7-2.7 inclusive. (see above formula)

IPC Classes  ?

91.

PRIMER COMPOSITION

      
Document Number 02812018
Status In Force
Filing Date 2011-09-09
Open to Public Date 2012-03-22
Grant Date 2014-06-03
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Takita, Yuka
  • Miyauchi, Kyouko
  • Yamabe, Hidetoshi

Abstract

Provided is a primer composition that is for metal materials, forms a primer layer having superior adhesion and film formation characteristics on the surface of various metal materials including ordinary steel, stainless steel, aluminum, aluminum alloys, copper, and zinc plating, and imparts superior adhesion strength and adhesion durability when adhered by means of an epoxy adhesive. The primer composition is applied to the surface of a metal material, is adhered by an epoxy adhesive, and contains: an epoxy resin that uses both a bifunctional epoxy resin containing at least a bisphenol A epoxy resin and a polyfunctional epoxy resin containing at least a phenolic novolac epoxy resin; a curing agent comprising a cyandiamide; a curing catalyst comprising an imidazole; and an inorganic oxide filler comprising silica and titanium oxide.

IPC Classes  ?

  • C09D 163/02 - Polyglycidyl ethers of bis-phenols
  • C09D 5/00 - Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
  • C09D 163/04 - Epoxynovolacs

92.

METHOD OF REMOVING COPPER IONS FROM COPPER CONTAINING NICKEL CHLORIDE SOLUTION AND METHOD OF PRODUCING ELECTRO-NICKEL

      
Document Number 02796844
Status In Force
Filing Date 2011-06-21
Open to Public Date 2011-12-29
Grant Date 2017-09-26
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Kakimoto, Minoru
  • Takaishi, Kazuyuki
  • Matsumoto, Nobuhiro

Abstract

A copper ion removing method for a copper containing nickel chloride solution, where the removal of copper contained in the copper containing nickel chloride solution can be accomplished efficiently, and an electro-nickel producing method are provided. The present invention relates to a copper ion removing method of removing copper ions from the copper containing nickel chloride solution (11') which has been produced by chlorine leaching of a nickel sulfide (10), comprising a first step of adding the copper containing nickel chloride solution (11'), which contains bivalent copper ions, with the nickel sulfide (10) for reduction of, at least, the bivalent copper ions to univalent copper ions, and a second step of adding a slurry produced by the first step with a nickel mat (12) and a chlorine leached residue (13) for solidification of the univalent copper ions in the slurry to form a sulfide.

IPC Classes  ?

  • C22B 23/00 - Obtaining nickel or cobalt
  • C25C 1/08 - Electrolytic production, recovery or refining of metals by electrolysis of solutions of iron group metals, refractory metals or manganese of nickel or cobalt
  • C25C 7/06 - Operating or servicing
  • C22B 3/04 - Extraction of metal compounds from ores or concentrates by wet processes by leaching
  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
  • C22B 15/00 - Obtaining copper

93.

ACTIVE MATERIAL PARTICLES HAVING SECONDARY PARTICLES WITH LITHIUM TRANSITION METAL OXIDES AND METHOD FOR PROCUCING THE SAME

      
Document Number 02781658
Status In Force
Filing Date 2010-10-07
Open to Public Date 2011-06-09
Grant Date 2015-02-17
Owner
  • TOYOTA JIDOSHA KABUSHIKI KAISHA (Japan)
  • SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Nagai, Hiroki
  • Morita, Masahiro
  • Mori, Kensaku
  • Imaizumi, Shin
  • Ikeuchi, Kenji
  • Osako, Toshiyuki
  • Toya, Hiroyuki

Abstract

Active material particles are provided that exhibit performance suitable for increasing the output of a lithium secondary battery and little deterioration due to charge-discharge cycling. The active material particles provided by the present invention have a hollow structure having secondary particles including an aggregate of a plurality of primary particles of a lithium transition metal oxide, and a hollow portion formed inside the secondary particles, and through holes that penetrate to the hollow portion from the outside are formed in the secondary particles. BET specific surface area of the active material particles is 0.5 to 1.9 m2/g.

IPC Classes  ?

  • H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
  • H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
  • H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
  • H01M 10/052 - Li-accumulators
  • H01M 10/0566 - Liquid materials

94.

MULTI-COMPONENT-SYSTEM LITHIUM PHOSPHATE COMPOUND PARTICLES HAVING AN OLIVINE STRUCTURE, MANUFACTURING METHOD THEREOF AND LITHIUM SECONDARY BATTERY EMPLOYING THE LITHIUM PHOSPHATE COMPOUND PARTICLES AS A POSITIVE ELECTRODE MATERIAL

      
Document Number 02741406
Status In Force
Filing Date 2009-10-20
Open to Public Date 2010-04-29
Grant Date 2014-08-19
Owner
  • THE FURUKAWA BATTERY CO., LTD. (Japan)
  • TOKYO METROPOLITAN PUBLIC UNIVERSITY CORPORATION (Japan)
  • SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Abe, Hidetoshi
  • Suzuki, Tomonori
  • Eguro, Takashi
  • Kanamura, Kiyoshi
  • Saito, Mitsumasa

Abstract

There is disclosed a multi-component system lithium phosphate compound particles having an olivine structure and represented by a general formula of Li Y M1 1-Z M2Z PO4 in which M1 is one metal element selected from the group consisting of Fe, Mn and Co, Y is a number satisfying a formula of 0.9 <= Y <= 1.2, M2 is at least one metal element selected from the group consisting of Mn, Co, Mg, Ti and Al, and Z is an number satisfying a formula of 0 < Z <= 0.1, wherein a concentration of the metal element M2 existing on a surface of the particle is higher than the concentration of that existing in core portion of the particle and that the concentration of the metal element M2 is continuously lowered from the surface of particle to a core portion of the particle.

IPC Classes  ?

  • C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
  • H01M 10/052 - Li-accumulators
  • H01M 10/0566 - Liquid materials
  • H01M 4/36 - Selection of substances as active materials, active masses, active liquids
  • H01M 4/58 - Selection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates

95.

METHOD FOR SCRUBBING AN AMINE TYPE EXTRACTANT AFTER STRIPPING

      
Document Number 02674490
Status In Force
Filing Date 2009-07-31
Open to Public Date 2010-02-07
Grant Date 2015-02-17
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Shoji, Hirofumi
  • Kobayashi, Hiroshi

Abstract

The method for scrubbing an amine type extractant after stripping to be able to regenerate the same so that the amine type extractant can be repeatedly reused as it is in the extraction stage in the solvent extraction process, when an amine type extractant is regenerated by scrubbing an amine type extractant (A) containing an iron and a zinc chloro complex ion obtained by back extracting a cobalt with a hydrochloric acid aqueous solution from the amine type extractant after extracting a cobalt. The method is characterized by comprising the procedures of the following (1) to (3). (1) an amine type extractant (B) is obtained by adding an aqueous solution containing a sulfite ion to an amine type extractant (A) and stirring the mixture and reducing a ferric (III) chloro complex ion to divalent. (2) an amine type extractant (C) is obtained by adding an aqueous solution containing an oxidizing agent to the amine type extractant (B) and stirring the mixture and oxidizing a sulfite ion to sulfate ion. (3) an amine type extractant removed an iron and a zinc is obtained by adding an aqueous solution containing a chloride ion to the amine type extractant (C) and stirring the mixture and replacing a sulfate ion with chloride ion.

IPC Classes  ?

96.

PROCESS OF SOLVENT EXTRACTION OF COPPER

      
Document Number 02498855
Status In Force
Filing Date 2004-05-13
Open to Public Date 2005-10-20
Grant Date 2011-11-15
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Takeda, Kenji
  • Ando, Kouji
  • Kudo, Keiji
  • Imamura, Masaki

Abstract

A process for efficient separation/recovery of copper involving selective extraction of the copper ion with the aid of an organic extractant from an aqueous chloride solution containing copper and one or more concomitant elements, discharged from an extractive metallurgy of non-ferrous metals or the like, and subsequent stripping. The process of solvent extraction of copper which treats an aqueous chloride solution containing copper and one or more concomitant elements to separate/recover copper, comprising the first step for selective extraction of copper from the aqueous chloride solution by mixing the solution with an extractant of organic solvent composed of tributyl phosphate as the major component after adjusting the solution at an oxidation-reduction potential of 0 to 350mV (based on an Ag/AgCl electrode), and the second step for stripping of copper by mixing the extractant in which copper is stripped with an aqueous solution.

IPC Classes  ?

  • C22B 3/26 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
  • B01D 11/04 - Solvent extraction of solutions which are liquid
  • C22B 11/00 - Obtaining noble metals
  • C22B 15/00 - Obtaining copper

97.

METHOD OF SEPARATION/PURIFICATION FOR HIGH-PURITY SILVER CHLORIDE, AND PROCESS FOR PRODUCING HIGH-PURITY SILVER BY THE SAME

      
Document Number 02524234
Status In Force
Filing Date 2004-08-31
Open to Public Date 2005-03-17
Grant Date 2012-05-22
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Heguri, Shinichi
  • Kasai, Masushi
  • Asano, Satoshi
  • Manabe, Yoshiaki
  • Kurokawa, Harumasa

Abstract

A method of efficient separation/purification for obtaining high-purity silver chloride which eliminates the necessity of a pretreatment of a refining intermediate comprising sparingly soluble silver compounds and impurity elements when silver chloride is separated from the refining intermediate and purified to a high degree and which enables the silver chloride to be used as a raw material to give high-purity silver metal without necessitating the pyrometallurgical refining or electro-refining of the silver metal. The method is characterized by comprising: a leaching step in which the refining intermediate is leached with an aqueous sulfite solution to extract silver with the solution to thereby form a silver-containing liquid resulting from the leaching and an insoluble residue; a silver chloride generation step in which the liquid resulting from the leaching is neutralized and acidified to precipitate silver chloride and thereby form the silver chloride and a mother liquor; and a silver chloride purification step in which the silver chloride is oxidized in an acidic aqueous solution by adding an oxidizing agent to dissolve and separate impurity elements and thereby form purified silver chloride and a solution containing the impurity elements.

IPC Classes  ?

98.

COBALT CARBONATE OF LOW ALKALI METAL CONTENT, METHOD FOR PRODUCING THE SAME AND COBALT OXIDE PRODUCED FROM THE SAME

      
Document Number 02475667
Status In Force
Filing Date 2004-07-21
Open to Public Date 2005-01-23
Grant Date 2012-02-21
Owner SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
  • Imamura, Masaki
  • Kobayashi, Hiroshi
  • Furukawa, Kazunori
  • Tsuchida, Naoyuki

Abstract

Disclosed are a method for producing a cobalt carbonate of low alkali metal content at a low cost in high productivity, and a cobalt oxide of low alkali metal content and high performance produced from the cobalt carbonate. The method comprises reacting an aqueous cobalt salt solution with a carbonate of an alkali metal to produce the cobalt carbonate; wherein: (1) a reaction temperature is controlled at less than or equal to 25°C, and/or (2) an aqueous solution of the carbonate of an alkali metal containing a hydroxide of the alkali metal in an amount of 5 to 40g/L is used as the carbonate of the alkali metal.

IPC Classes  ?