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
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.
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.
POSITIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES, POSITIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY
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.
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%.
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
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.
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
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.
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.
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.
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.
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.
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.
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%.
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.
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.
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
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.
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
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.
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
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.
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.
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.
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.
POSITIVE ELECTRODE MATERIAL FOR LITHIUM-ION SECONDARY BATTERIES, POSITIVE ELECTRODE FOR LITHIUM-ION SECONDARY BATTERIES, AND LITHIUM-ION SECONDARY BATTERY
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.
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.
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
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.
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.
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
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.
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.
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.
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
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.
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.
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
31.
METHOD FOR PRODUCING NI/CO SULFIDE AND SYSTEM FOR STABILIZING IRON GRADE
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)].
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.
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
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.
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.
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.
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.
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.
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.
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.
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.
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
41.
CATHODE MATERIAL USING ACTIVE PARTICLES IN A VISCOSITY-CONTROLLED PASTE,CATHODE USING THIS MATERIAL, AND LITHIUM-ION SECONDARY BATTERY USING THIS CATHODE
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
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.
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
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...
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.
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.
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.
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
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
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.
C22B 3/38 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
48.
METAL ELECTRODEPOSITION CATHODE PLATE AND PRODUCTION METHOD THEREFOR
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.
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
Provided is a method for nickel production, in which equipment wear due to abrasion or impact between the equipment and nickel powder during discharge thereof from a pressurized container is minimized. In the present method, a nickel sulfate ammine complex liquid and nickel powder are supplied to a reaction container, hydrogen gas is continuously supplied while the inside of the reaction container is maintained at a set temperature and pressure. Nickel ions in the nickel sulfate ammine complex liquid are reduced to nickel and deposited on the surfaces of the nickel powder, a reacted slurry including the nickel sulfate amine complex liquid and the nickel powder is then transferred to a pressurized storage container at the same or slightly lower pressure than the internal pressure of the reaction container. The pressure of the pressurized storage container is then reduced, and the reacted slurry is extracted from the pressurized storage container.
B22F 9/26 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions using gaseous reductors
The risk of a valve seat being damaged is greatly reduced even when this cone valve is used as a non-return valve when delivering a slurry containing highly abrasive, coarse particles, such as a slurry of nickel oxide ore. The cone valve of the present invention is a cone valve (1) used as a non-return valve when delivering a slurry, the cone valve (1) characterized by being provided with a valve seat (13), a valve body (11) that moves back and forth in a prescribed direction relative to the valve seat and undergoes an opening and closing action, and a coil spring (14) incorporated so as to bring the valve body into contact with the valve seat, the cone valve (1) further characterized by a configuration where the valve seat is given an annular contact surface by the contact with an end part (11a) of the valve body, and the valve seat has a thick portion where the thickness in the normal direction of the contact surface increases inward from the contact surface.
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.
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
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.
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.
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.
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
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.
Provided is a production process by which a so-called high-purity nickel powder made up of coarse particles and reduced in the content of impurities, in particular, in sulfur content, is produced from a nickel sulfate ammine complex solution using a fine nickel powder. This process is for producing a nickel powder from a nickel sulfate solution, and is characterized by conducting the following treatment steps (1) to (4): (1) a hydroxylation step in which a sediment of nickel hydroxide is yielded; (2) a complexation step in which a mixed slurry comprising a nickel sulfate ammine complex solution, seed crystals, and the nickel hydroxide is formed; (3) a reduction step in which a reduction slurry containing a nickel powder formed by the deposition of nickel matter on the seed crystals is formed; and (4) a solid-liquid separation step in which the reduction slurry formed in the reduction step (3) is subjected to solid-liquid separation to recover the nickel powder and a reduction end liquid.
B22F 9/26 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions using gaseous reductors
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.
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
Provided is a production method for producing coarse particles of high purity Co powder from a cobalt amine sulfate complex solution using fine Co powder and using industrially inexpensive H2 gas.
B22F 9/26 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions using gaseous reductors
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.
A method for producing nickel powder sequentially includes: a mixing step of adding, to a nickel ammine sulfate complex solution, an insoluble solid as seed crystals and a polyacrylate or lignosulfonate as a dispersant to form a mixed slurry; and a reduction and precipitation step of charging a reaction vessel with the mixed slurry and blowing hydrogen gas into the mixed slurry in the reaction vessel to reduce nickel complex ions in the mixed slurry to form nickel precipitate on the surface of the insoluble solid, wherein the amount of the dispersant added in the mixing step is controlled to control the number of the nickel powder obtained by formation of the nickel precipitate in the reduction and precipitation step.
B22F 9/26 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions using gaseous reductors
B22F 9/24 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions
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).
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.
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
64.
ION EXCHANGE RESIN AND METHOD FOR ADSORBING AND SEPARATING METAL
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.
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
Provided is a hydrometallurgical process for nickel oxide ore for recovering nickel and cobalt using a high pressure acid leach process, the process achieving simplification and durability improvement of production facilities, achieving cost reduction and suppression of environmental risk by the compression of the capacity of a tailings dam for storing wastes, and being capable of recycling and effectively utilizing the wastes as a resource. The hydrometallurgical process for nickel oxide ore for recovering nickel and cobalt using a high pressure acid leach process includes an ore processing step, a leaching step, a solid-liquid separation step, a neutralization step, a zinc removal step, a sulfurization step, and a final neutralization step, and further includes step (A), or further includes step (A) and, step (B-1) and/or step (B-2) after step (A).
Provided is a production method for reducing the content grades of sulfur and carbon, which are impurities contaminating a nickel powder, for the purpose of improving the quality of a nickel powder produced employing a complexing reduction process. A method for producing a nickel powder having a low carbon concentration and a low sulfur concentration, said method being characterized by comprising: carrying out a complexing treatment, wherein the complexing treatment comprises adding a complexing agent to an aqueous nickel sulfate solution to produce a solution containing nickel complex ions; blowing a hydrogen gas into the solution containing nickel complex ions while maintaining the solution at a liquid temperature of 150 to 250ºC in a pressure container to achieve hydrogen reduction, thereby producing a nickel powder; washing the nickel powder with water; and roasting the washed product under a nitrogen/hydrogen mixed gas atmosphere.
B22F 9/26 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions using gaseous reductors
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.
KOCHI UNIVERSITY, NATIONAL UNIVERSITY CORPORATION (Japan)
SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
Yanagisawa, Kazumichi
Zhang, Junhao
Takaishi, Kazuyuki
Yoneyama, Tomoaki
Heguri, Shin-Ichi
Ohara, Hideki
Ikeda, Osamu
Kudo, Yohei
Ozaki, Yoshitomo
Abstract
Provided is nickel powder obtained by adding seed crystals to a nickel ammine complex solution and performing hydrogen reduction reaction under high temperatures and high pressures, wherein the nickel powder does not produce dust during handling, and a container can be efficiently filled with the nickel powder. The method for producing nickel powder includes: adding seed crystals and a surfactant having a nonionic or anionic functional group to a solution containing a nickel ammine complex to forma mixed slurry; and subjecting the mixed slurry to hydrogen reduction under high temperature and high pressure conditions in a pressure vessel to obtain nickel powder from the mixed slurry.
B22F 9/26 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions using gaseous reductors
The disclosure relates to a method of recovering scandium, comprising: a washing step of washing a mixture containing scandium hydroxide, scandium oxide and/or scandium carbonate and manganese hydroxide, manganese oxide and/or manganese carbonate; and a dissolution step of dissolving a post-washing sediment obtained after washing in the washing step in an acid. The washing step comprises a step of washing the mixture with a washing liquid until the pH of a post-washing liquid obtained after washing in the washing step becomes 6 or more.
KOCHI UNIVERSITY, NATIONAL UNIVERSITY CORPORATION (Japan)
Inventor
Yanagisawa, Kazumichi
Zhang, Junhao
Heguri, Shin-Ichi
Ozaki, Yoshitomo
Takaishi, Kazuyuki
Ohara, Hideki
Yoneyama, Tomoaki
Ikeda, Osamu
Kudo, Yohei
Abstract
A method for producing nickel powder is provided that sequentially includes: a mixing step of adding, to a solution containing a nickel ammine sulfate complex, a dispersant containing a sulfonate and an insoluble solid which is insoluble in the solution to form a mixed slurry; a reduction and precipitation step of charging a reaction vessel with the mixed slurry and then blowing hydrogen gas into the mixed slurry in the reaction vessel to reduce nickel complex ions contained in the mixed slurry to form nickel precipitate on a surface of the insoluble solid; and a separation step of separating the nickel precipitate on the surface of the insoluble solid from the surface of the insoluble solid to form nickel powder.
B22F 9/26 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions using gaseous reductors
Provided is a method for producing fine nickel powder used as suitable seed crystals for producing nickel powder from a solution containing a nickel ammine sulfate complex. The method for producing nickel powder sequentially comprises: a mixing step of adding, to a solution containing a nickel ammine sulfate complex, an insoluble solid which is insoluble in the solution to form a mixed slurry; a reduction and precipitation step of charging a reaction vessel with the mixed slurry and then blowing hydrogen gas into the mixed slurry in the reaction vessel to reduce nickel complex ions contained in the mixed slurry to form nickel precipitate on a surface of the insoluble solid; and a separation step of separating the nickel precipitate on the surface of the insoluble solid from the surface of the insoluble solid to form nickel powder.
B22F 9/26 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions using gaseous reductors
Damage of a lining member is prevented through mitigation of stress concentration due to a difference in thermal expansion. A lining structure 1 of a lining member 20 is provided on a base material 10 of an insertion tube 3 used for adding a chemical to a reaction vessel 2 for leaching under high temperature and high pressure. The base material 10 has a tube section 11 and a flange section 12. The lining member 20 is provided on the base material 10 and formed of a material different from that of the base material 10, and has a tube section lining section 21 provided on the tube section 11 and a flange lining section 22 provided on the flange section 12. A chamfer section 13 is formed on the flange section 12. The tube section lining section 21 is protruded to the same height as a flat surface 22a of the flange lining section 22. The flange lining section 22 has a curved surface section 24 protruded toward the base material 10 side on the chamfer section 13 and is welded to a protruding section of the tube section lining section 21 that protrudes from a slant surface 13a of the chamfer section 13.
F16J 15/12 - Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
F16L 51/00 - Expansion-compensation arrangements for pipe-lines
F16L 57/00 - Protection of pipes or objects of similar shape against external or internal damage or wear
73.
EXTRACTION AGENT FOR PRECIOUS METALS AND RHENIUM, AND EXTRACTION METHOD FOR PRECIOUS METALS AND RHENIUM USING SAME
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)
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.
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)
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.
Provided is a hydrometallurgical process of recovering Ni from nickel oxide ore using a high pressure acid leaching, in which abrasion of the facilities caused by an ore slurry is suppressed, the amount of a final neutralized residue is reduced, and impurity components are separated and recovered for recycling. The hydrometallurgical process includes, as steps of the high pressure acid leaching, at least one step selected from step (A): separating and recovering chromite particles in the ore slurry produced from an ore processing step, by a recovery process including a specific gravity separation; step (B-1): subjecting the ore slurry having the Cr-level lowered through the step (A), to a leaching step and a solid-liquid separation step, and performing neutralization of a leachate obtained after the solid-liquid separation step using a Mg-based alkali such as Mg(OH)2; and step (B-2): subjecting the ore slurry having the Cr-level lowered through the step (A), to the leaching step and the solid-liquid separation step, performing neutralization of a leachate obtained after the solid-liquid separation step using a Mg-based alkali such as Mg(OH)2, and then recovering hematite particles.
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.
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.
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
80.
SETTLING SEPARATION PROCESS FOR NEUTRALIZED SLURRY AND HYDROMETALLURGICAL PROCESS FOR NICKEL OXIDE ORE
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.
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
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.
Provided is a production method which enables the purification of hematite having a low sulfur component content from an iron-oxide-containing leach residue produced in an HPAL process to such an extent that the hematite can be used as an iron-making raw material. A method for purifying iron oxide for iron-making use in a process comprising adding sulfuric acid to a nickel oxide ore and allowing nickel to be leached out from the nickel oxide ore using a pressurized container, said method being characterized in that the amount of the sulfuric acid to be added is 150 to 220 Kg inclusive relative to 1 ton of the nickel oxide ore.
KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION (Japan)
SUMITOMO METAL MINING CO., LTD. (Japan)
Inventor
Goto, Masahiro
Kubota, Fukiko
Baba, Yuzo
Abstract
Provided is a method for selectively extracting and inexpensively recovering scandium from an acidic solution containing calcium, magnesium, and scandium. The scandium extraction method according to the present invention involves subjecting an acidic solution containing calcium, magnesium, and scandium to solvent extraction using an extraction agent consisting of an amide derivative represented by the general formula below. In the formula, R1 and R2 represent the same or different alkyl groups, and R3 is a hydrogen atom or alkyl group. The amide derivative preferably consistsi of one or more derivatives selected from glycine amide derivatives, histidine amide derivatives, lysine amide derivatives, and aspartic acid amide derivatives. The pH of the acidic solution is preferably pre-adjusted to between 1 and 4.
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.
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
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.
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.
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.
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.
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)
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.
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.
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
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.
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
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
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.
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
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.
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.
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.
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.
A method for suppressing the oxidation of sulfide minerals in a sulfide ore, which comprises adding an antioxidant containing an organic acid having a carboxyl group as a primary component and also containing a vegetable polyphenol to the sulfide ore accumulated in a stock pile or an accumulation spot for waste stones. The method allows the suppression of the oxidation of sulfide minerals in a sulfide ore by bacteria or the like, which results in the prevention of the elution of a heavy metal component from the sulfide ore, and in the alleviation of the reduction in the performance of the ore dressing by floatation in the treatment of the sulfide ore accumulated in a stock pile, and further, in an easier treatment of an acidic waste from a stock pile or an accumulation spot for waste stones.
patents
