A method for treating battery waste includes: a first heat treatment step of heating the battery waste in an atmosphere containing at least one selected from the group consisting of nitrogen, carbon dioxide and water vapor; and after the first heat treatment step, a second heat treatment step of changing the atmosphere in the first heat treatment step and heating the battery waste in an atmosphere which is different from the atmosphere in the first heat treatment step and which contains a larger amount of oxygen than that in the first heat treatment step.
Provided is a method for processing lithium ion battery waste, which can effectively precipitate aluminum ions and iron ions in the solution by neutralization and relatively easily separate the precipitate. The method for processing lithium ion battery waste includes: a leaching step of leaching battery powder in an acid, the battery powder containing at least aluminum and iron and being obtained from lithium ion battery waste, and removing a leached residue by solid-liquid separation to obtain a leached solution containing at least aluminum ions and iron ions; and a neutralization step of adding phosphoric acid and/or a phosphate salt and an oxidizing agent to the leached solution, increasing a pH of the leached solution to a range of 2.0 to 3.5, precipitating the aluminum ions and the iron ions in the leached solution as aluminum phosphate and iron phosphate, respectively, and removing a neutralized residue by solid-liquid separation to obtain a neutralized solution.
A method for producing a mixed metal solution containing manganese ions and at least one of cobalt ions and nickel ions, the method including: an Al removal step of subjecting an acidic solution containing at least manganese ions and aluminum ions, and at least one of cobalt ions and nickel ions, to removal of the aluminum ions by extracting the aluminum ions into a solvent while leaving at least a part of the manganese ions in the acidic solution in an aqueous phase, the acidic solution being obtained by subjecting battery powder of lithium ion batteries to a leaching step; and a metal extraction step of bringing an extracted residual liquid obtained in the Al removal step to an equilibrium pH of 6.5 to 7.5 using a solvent containing a carboxylic acid-based extracting agent, extracting at least one of the manganese ions and at least one of the cobalt ions and the nickel ions into the solvent, and then back-extracting the manganese ions and at least one of the cobalt ions and nickel ions.
The present invention provides a method for producing lithium hydroxide, said method enabling the production of lithium hydroxide from lithium sulfate at a relatively low cost. A method for producing lithium hydroxide from lithium sulfate, said method comprising: a hydroxylation step wherein a lithium hydroxide solution is obtained by reacting the lithium sulfate with barium hydroxide in a liquid; a barium removal step wherein barium ions are removed from the lithium hydroxide solution with use of a cation exchange resin and/or a chelating resin; and a crystal precipitation step wherein lithium hydroxide is precipitated in the lithium hydroxide solution after the barium removal step.
A method for producing mixed metal salts containing manganese ions and at least one of cobalt ions and nickel ions, the method including: an Al removal step of subjecting an acidic solution containing at least manganese ions and aluminum ions, and at least one of cobalt ions and nickel ions, to removal of the aluminum ions by extracting the aluminum ions into a solvent, the acidic solution being obtained by subjecting battery powder of lithium ion batteries to a leaching step; and a precipitation step of neutralizing an extracted residual liquid obtained in the Al removal step under conditions where a pH is less than 10.0, to precipitate mixed metal salts comprising a metal salt of manganese and a metal salt of at least one of cobalt and nickel.
Provided is a method for efficiently promoting a leaching reaction of copper. Equipment for leaching copper includes a reactor for leaching reaction and a controller for oxidation-reduction potential. The reactor is configured to be provided with a leaching solution containing iodine and iron. The reactor is configured to be capable of being tightly sealed during the leaching reaction. The controller for oxidation-reduction potential is configured so that, during the leaching reaction, the oxidation-reduction potential of the leaching solution can be maintained at 500 mV (based on Ag/AgCl reference) or higher.
A method for heat-treating battery waste containing lithium includes: allowing an atmospheric gas containing oxygen and at least one selected from the group consisting of nitrogen, carbon dioxide and water vapor to flow in a heat treatment furnace in which the battery waste is arranged, and heating the battery waste while adjusting an oxygen partial pressure in the furnace.
Provided is a method for removing a linear object, a device for removing a linear object, and a method for processing electronic/electrical equipment component waste, which can improve separation efficiency. The method for removing linear objects including: arranging a plurality of filters 3 in a vibrating sieve machine 1 such that the filters 3 are adjacent to each other so as to partially overlap with each other in a feed direction of a raw material, each of the filters 3 comprising a plurality of rods 2 extending at distances in the feed direction of the raw material and a beam portion 21 supporting the plurality of rods 1 at one ends of the plurality of the rods 2, the other ends of the plurality of the rods 2 being free ends; arranging a guide 6 below a tip of one of the filters 3 located on a most downstream side in the feed direction; feeding the raw material containing at least linear objects and plate-form objects into the vibrating sieve machine 1; and sorting the linear objects and the plate-form objects by vibrating the filters 3, sieving the linear objects to an under-sieve side of the vibrating sieve machine 1, and capturing lumpy linear objects with the guide.
B07B 1/12 - Apparatus having only parallel elements
B07B 9/00 - Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
B09B 5/00 - Operations not covered by a single other subclass or by a single other group in this subclass
9.
RAW MATERIAL DISCHARGE DEVICE, METHOD OF PROCESSING OF ELECTRONIC/ELECTRICAL DEVICE COMPONENT SCRAP, AND METHOD OF RAW MATERIAL DISCHARGE FOR ELECTRONIC/ELECTRICAL DEVICE COMPONENT SCRAP
Provided are a raw material discharge device, a method of processing of electronic/electrical device component scrap, and a method of raw material discharge for electronic/electrical device component scrap enabling efficient discharge of respective predetermined amounts of a raw material in which raw materials of a variety of shapes, specific gravities, and shapes are mixed together. The invention is a raw material discharge device 100 that is provided with: a storage unit 1 that is provided, at one end, with a discharge port 11 for discharging raw material, and that stores the raw material; a discharge unit 2 that is arranged on a bottom surface 15 of the storage uni1, that transports the raw material toward the discharge port 11, and that discharges same to the outside of the storage unit 1; and an adjustment unit 3 that is provided with a plurality of struts 31 that extend from above to below the discharge unit 2, and that suppresses some of the raw material with the struts 31 to adjust the amount of raw material that is discharged to the outside of the storage unit 1. The device is able to adjust: a ratio (d1/d2) of an interval (d1) between a strut 31 closest to a side surface 13, 14 of the storage unit 1 and the side surface 13, 14 of the storage unit 1, and an interval (d2) that is narrowest of the intervals between struts 31 of a center part of the storage unit 1, as well as a ratio (H1/H2) of a height (H1) from the floor of the strut 31 closest to the side surface 13, 14 of the storage unit 1 and a smallest height (H2) from the floor of a strut 31 other than the strut 31 closest to the side surface of the storage unit 1, so as to prevent clogging of the raw material being discharged to the outside of the storage unit.
Provided herein is a production method of an additive manufactured object according to an electron beam-based additive manufacturing method using a pure copper powder with a Si coating formed thereon capable of suppressing the partial sintering of the pure copper powder caused by the preheating thereof in additive manufacturing based on the electron beam method, and suppressing the loss of the degree of vacuum caused by carbon (C) during the molding process, as well as to provide the optimal additive manufacturing conditions to be applied to such pure copper powder having a Si coating formed thereon.
A method for recovering at least cobalt, among valuable metals of cobalt and nickel, from an acidic solution that is produced by subjecting a waste material containing a positive electrode material of a lithium ion secondary battery to a wet-mode treatment and contains a cobalt ion, a nickel ion and impurities, the method comprising: a first extraction step for Co recovery purpose, in which a cobalt ion is extracted from the acidic solution by means of solvent extraction and is then back-extracted; an electrolysis step for Co recovery purpose, in which electrolysis is carried out using a post-back-extraction solution produced in the first extraction step for Co recovery purpose as an electrolyte solution to produce electrolytic cobalt; a dissolution step for Co recovery purpose, in which the electrolytic cobalt is dissolved in an acid; and a second extraction step for Co recovery purpose, in which a cobalt ion is extracted from a cobalt dissolution solution produced in the dissolution step for Co recovery purpose by means of solvent extraction and is then back-extracted.
C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
B09B 3/70 - Chemical treatment, e.g. pH adjustment or oxidation
B09B 3/80 - Destroying solid waste or transforming solid waste into something useful or harmless involving an extraction step
C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
C22B 3/26 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
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
Provided is a method for recovering at least cobalt from among the valuable metals cobalt and nickel from an acid solution containing cobalt ions, nickel ions and impurities, obtained by subjecting waste containing positive electrode material of lithium-ion rechargeable batteries to a wet process. The method comprises a first extraction step for recovering Co reverse-extracted when extracting cobalt ions by solvent extraction from the acid solution; and a second extraction step for recovering cobalt, in which cobalt ions are reverse extracted and extracted by solvent extraction from the post-reverse extraction liquid obtained in the first extraction step for cobalt recovery. The first extraction step for recovering Co has a solvent extraction process in which cobalt ions in the acid solution are extracted in a solvent; a scrubbing process in which the solvent used to extract the cobalt ions is scrubbed; and a reverse extraction process in which cobalt ions in the solvent after scrubbing are reverse extracted into solution.
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
13.
APPARATUS FOR ANALYZING COMPOSITION OF ELECTRONIC AND ELECTRICAL DEVICE PART SCRAPS, DEVICE FOR PROCESSING ELECTRONIC AND ELECTRICAL DEVICE PART SCRAPS, AND METHOD FOR PROCESSING ELECTRONIC AND ELECTRICAL DEVICE PART SCRAPS
A composition analyzer of electronic/electrical equipment parts waste which, in a short time, can determine the composition of parts waste in electronic/electrical equipment parts waste, a composition analysis method of electronic/electrical equipment parts waste, and a treatment method of electronic/electrical equipment parts waste that uses these are provided. This composition analyzer of electronic/electrical equipment parts waste is provided with: a classification data storage means 111 which extracts images of multiple component types from images captured of electronic/electrical equipment parts waste comprising the multiple component types and stores classification data for sorting by component type; a sorting means 101 which, on the basis of the classification data, extracts images of the multiple component types from the images captured of the electronic/electrical equipment parts waste and sorts these by component type; and an analysis means 103 which analyzes at least one of the surface area, number, average particle diameter and weight ratio of each of the component types sorted by the sorting means 101.
Provided is a method for selecting a mineral containing arsenic. A peptide having the following amino acid sequence: (TSNQ)-(LIVFA)-(ED)-(RKNMDCPQSETGWHY)-(LIVFA)-(RKNMDCPQSETGWHY)-(LIVFA)-(LIVFA)-(LIVFA)-(RHK)-(TSNQ)-(TSNQ) [wherein any one of at least one kind of amino acid in parentheses is selected].
C07K 7/08 - Linear peptides containing only normal peptide links having 12 to 20 amino acids
C07K 14/00 - Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
C12N 1/00 - Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
C12N 7/01 - Viruses, e.g. bacteriophages, modified by introduction of foreign genetic material
C12N 15/10 - Processes for the isolation, preparation or purification of DNA or RNA
C22B 3/18 - Extraction of metal compounds from ores or concentrates by wet processes with the aid of microorganisms or enzymes, e.g. bacteria or algae
C22B 3/22 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means
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 are a linear object removal method, a linear object removal device, and an electronic/electric apparatus component scrap processing method that make it possible to efficiently sort out linear objects from objects to be sorted that include various shapes. The linear object removal method includes: disposing a plurality of filters 3 inside a vibrating sieve machine 1 by adjoining the filters so as to partially overlap each other along a raw material supply direction, the filters comprising a plurality of rods 2 which extend with intervals therebetween along the supply direction and beam parts 21 which support the plurality of rods 2 at one end 2a of each of the plurality of rods 2, with the other ends 2b of the plurality of rods 2 serving as free ends; and supplying the raw material, which includes at least linear objects and sheet-like objects, to the inside of the vibrating sieve machine 1, and imparting a vibration to the filters 3, thereby sifting the linear objects toward the sieve bottom of the vibrating sieve machine 1.
B07B 13/04 - Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices according to size
16.
METHOD FOR PROCESSING ELECTRONIC AND ELECTRICAL DEVICE COMPONENT SCRAP
Provided is a method for processing electronic and electrical device component scrap, with which it possible to selectively process, accurately and efficiently, electronic and electrical device scrap and the like. This method for processing electronic and electrical device component scrap is characterized by containing a separation step in which a sorter 10 comprising a metal sensor 2, a color camera 3, an air valve 4 and a conveyor 5 is used to separate non-metal materials 1b or metal materials 1a1 and 1a2 from electronic and electrical device component scrap 1 containing metal materials 1a1 and 1a2 and non-metal materials 1b, wherein when detecting the metal materials 1a1 and 1a2 in the electronic and electrical device component scrap using the metal sensor 2, a given interval is provided between the adjoining metal materials 1a1 and metal materials 1a2, to prevent non-metal materials 1b present between the metal materials 1a1 and metal materials 1a2 from being incorrectly detected.
Provided is a method for processing electronic and electrical device component scrap, with which it is possible to increase the amount of electronic and electrical device components processed in the smelting process, and to efficiently recover valuable metals. This method for processing electronic and electrical device component scrap comprises: a first step for removing powder and film-form component scrap from electronic and electrical device component scrap; a second step for concentrating synthetic resin and substrates from electronic and electrical device component scrap from which powder and film-form component scrap has been removed; and a third step for concentrating substrates containing valuable metals from the concentrate obtained in the second step.
Provided is a processing method for electronic/electric device component waste by which it is possible to increase the amount of electronic/electric device component waste that can be processed in a smelting step, and by which valuable metals can be efficiently recovered. The processing method for electronic/electric device component waste includes a step for processing the electronic/electric device component waste in a smelting step, and includes, prior to the smelting step, a step for reducing smelting inhibitors contained in the electronic/electric device component waste.
METHOD FOR REMOVING WIRE-FORM OBJECTS, DEVICE FOR REMOVING WIRE-FORM OBJECTS, AND METHOD FOR PROCESSING ELECTRONIC/ELECTRICAL APPARATUS COMPONENT SCRAP
Provided are a method for removing wire-form objects, a device for removing wire-form objects, and a method for processing electronic/electrical apparatus component scrap with which it is possible to efficiently sort wire-form objects from objects to be sorted that include various shapes. This method for removing wire-form objects includes: disposing a filter in a vibrating sieve machine, the filter being provided with a plurality of rods that extend in a supply direction of a raw material, the rods having gaps formed therebetween; and disposing the raw material, which includes at least wire-form objects and sheet-form objects, on the filter and imparting vibration to the filter, thereby sieving the wire-form objects to below the sieve.
Providing a method of recovering Cu from copper ore containing Hg. A method for recovering Cu from copper ore, the method comprising: (A) providing copper ore containing Hg with an amount of 0.2 ppm or more; (B) treating the copper ore to leach Cu and Hg with use of solution containing iodide ions and Fe (3+); and (C) treating post-leaching solution with activated carbon to absorb the iodide ions and Hg.
85068386 ABSTRACT This metal powder is characterized in that: a coating film, which is composed of at least one among Gd, Ho, Lu, Mo, Nb, Os, Re, Ru, Tb, Tc, Th, Tm, U, V, W, Y, Zr, Cr, Rh, Hf, La, Ce, Pr, Nd, Pm, Sm and Ti, is formed on the surface of copper or copper alloy powder; and the film thickness of said coating film is 5-500 nm. The present invention addresses the problem of providing: metal powder for additive manufacturing a metal laminate by a laser method, in which the metal powder can be efficiently melted by laser while retaining the high conductivity of copper or a copper alloy; and a metal additive manufactured object manufactured using said metal powder. Date Recue/Date Received 2020-09-01
The present invention addresses the problem of providing: a copper alloy powder for lamination shaping, being capable of providing both mechanical strength and electrical conductivity and being formed of a copper alloy; a lamination shaped product production method; and a lamination shaped product. One aspect of the present invention is a copper alloy powder for lamination shaping, containing an additional element the amount of a solid solution of which is less than 0.2 at% with respect to copper.
The present invention provides a copper powder which is capable of fusion bonding with a low energy laser by enabling heat to be efficiently inputted with a high absorption rate for laser irradiation and has high convenience in handling, and provides a method for manufacturing the copper powder. One embodiment of the present invention is a copper powder, having an absorption rate for light having a wavelength .lambda.= 1060 nm of 18.9% to 65.0%, and an index, which is indicated by (the absorption rate for light having a wavelength .lambda.= 1060 nm) / (an oxygen concentration), of 3.0 or more.
B22F 3/105 - Sintering only by using electric current, laser radiation or plasma
B22F 3/16 - Both compacting and sintering in successive or repeated steps
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
B22F 9/10 - 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 using centrifugal force
This lithium recovery method separates sodium from a lithium-containing solution including lithium ions and sodium ions and recovers lithium. The lithium recovery method has a solvent extraction step including: an at least three-stage extraction process having a first extraction process, a second extraction process, and a third extraction process: and a lithium back-extraction process that back-extracts lithium ions from the solvent that has passed through the at least three-stage extraction process. During the extraction process, the solvent passes through each of the processes being the first extraction process, the second extraction process, and the third extraction process, in order, and the lithium-containing solution passes through each process in the reverse order to the order for the solvent.
The present invention relates to methods for treating lithium ion battery scrap to recover valuable metals at a high recovery rate and low cost. In embodiments, the present invention provides a method for treating lithium ion battery scrap to recover Li, Ni (when present), Co, Mn, Al, Cu and Fe by subjecting the lithium ion battery scrap to: a calcination step, a crushing step, a sieving step, a leaching step, a Fe/Al removal step, an Al/Mn extraction step, a Co recovery step, a Ni recovery process, a Li concentration step, a neutralization step and a Li recovery step in this order. The conditions of the Al removal process are controlled to remove a part of Al while preventing loss of Co and Ni caused by coprecipitation with Al. The method may be varied for example by omitting the Ni recovery step and/or the neutralization step.
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
(Technical problems to be solved) Providing a method for selecting minerals containing arsenic (Means for solving the problems) A peptide comprising an amino acids sequence according to the following formula: (TSNQ)-(HPW)-(ED)-(HPWRK)-(LIVFA)-(LIVFA)-(LIVFA)-(TSNQ)-(HPW)-(LIVFA)-(TSNQ)-(LIVFA) wherein one amino acid is respectively selected from each group defined by paired parentheses.
[Problem] To provide a method for selecting a molybdenum mineral. [Solution] A composition which comprises M13 phage, wherein the composition is for separating a substance containing molybdenum.
(Technical problems to be solved) Providing a method for selecting an mineral of molybdenum. (Means for solving the problems) A peptide comprising an amino acids sequence according the following formula (1) and/or (2): (1) (ALRKNMDFCPQSETGWHYIV)-(LIVFA)-(HPWRK)-(TSNQ)-(TSNQ)-(LIVFA)-(TSNQ)-(TSNQ)-(LIVFA)-(FYW)-(LIVFA)-(HPWRK) (2) (LIVFA)-(RHK)-(TSNQ)-(LIVFA)-(LIVFA)-(TSNQ)-(LIVFA)-(LIVFA)-(LIVFA)-(RHK)-(RHK)-(HPW) wherein one amino acid is respectively selected from each group defined by paired parentheses.
The present invention provides a method for recovering gold in an ore or a refining intermediate which can contribute to improve the recovery rate of gold. The method for recovering gold from an ore or a refining interrnediate containing gold comprises a step of contacting a gold-containing raw material obtained from the ore or the refining intermediate with an acidic solution containing a copper ion, an iron ion and a halide ion while supplying an oxidizing agent to leach the gold component in the raw material, and the halide ion in the acidic solution comprising at least a bromide ion, wherein the concentration of the bromide ion is less than 100 g/L, a concentration ratio of the halide ions in the acidic solution is such that a ratio of the concentration of the chloride ion to the concentration of the bromide ion (a Cl/Br concentration ratio) is 1/3 or less.
An activated carbon regeneration method of the present invention is for eluting gold from activated carbon on which the gold has been adsorbed and thereafter recycling, in adsorption of the gold, the used activated carbon from which the gold has been eluted, the method including: washing the used activated carbon with an acidic washing liquid, alkaline washing liquid or neutral washing liquid; and when the used activated carbon is washed with the acidic washing liquid, keeping the acidic washing liquid after the washing in an acidic region, or when the used activated carbon is washed with the alkaline washing liquid or neutral washing liquid, keeping the alkaline washing liquid or neutral washing liquid after the washing in an alkaline region or neutral region.
C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
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
The purpose of the present invention is to make it possible: to, before gold is eluted, effectively remove copper, iron, and sulfur, which are impurities from the standpoint of gold recovery, from activated carbon on which gold has been adsorbed; and to efficiently elute the gold. Provided is a method for eluting gold (Au) from activated carbon on which at least sulfur (S) and Au have been adsorbed, the method comprising cleaning the activated carbon with an alkali before gold is eluted and thereafter eluting the Au.
B01J 20/20 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising carbon obtained by carbonising processes
Provided is a processing method for arsenic, with which it is possible for the arsenic that is contained in copper ore containing arsenic to be processed into a stable form suitable for long-term storage and preservation . This arsenic processing method is characterized by including: a roasting step for roasting copper ore containing arsenic in a non-oxidative atmosphere, and separating the copper pyrites from the volatiles that contain arsenic sulfides; a heat treatment step for heat treating the volatiles obtained in the roasting step, in a non-oxidative atmosphere, causing the arsenic sulfides in the volatiles to melt; a grinding step for grinding the volatiles subsequent to the heat treatment step; and a remelting step for heating and remelting the volatiles subsequent to the grinding step.
The present invention provides a pretreated gold ore suitable for hydrometallurgically recovering gold from gold ore containing pyrite. A pretreated gold ore for hydrometallurgically recovering gold from gold ore which contains pyrite (FeS2), wherein it has an accumulative pore volume for pores having a diameter of 3 to 5 µm that is twice or more times larger than prior to pretreatment.
The present invention provides a method of pretreating gold ore for leaching gold from gold ore containing pyrite that enables to enhance the gold-leaching speed while the generation of sulfur dioxide is suppressed. The method of pretreating gold ore for hydrometallurgically recovering gold from gold ore which contains pyrite (FeS2), the method comprising a step of converting pyrite contained in the gold ore to iron compound soluble to hydrochloric acid.
Disclosed is A method of recovering gold from sulfide ores comprising: Step 1 for contacting sulfide ores or a leaching residue obtained after sulfide ores are leached with a acidic aqueous solution containing chlorine ions, bromine ions, copper ions and iron ions with supplying an oxidizing agent to leach the gold content in the leaching residue; Step 2 for storing the post-gold-leaching solution obtained by leaching the gold content and keeping a concentration of bromine ions in the post-gold-leaching solution at 40 g/L or higher, and the oxidation-reduction potential (reference electrode: silver/silver chloride) at 500 mV or greater; Step 3 for adding copper(I) chloride to the post-gold-leaching solution thus obtained in Step 2, and then adding an oxidizing agent to adjust the oxidation-reduction potential to 520 mV or greater, to thereby reduce monovalent copper ions in the post-gold-leaching solution; and Step 4 for adsorbing gold in the post-gold-leaching solution thus obtained in Step 3 to activated carbon.
C22B 3/04 - Extraction of metal compounds from ores or concentrates by wet processes by leaching
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
36.
METHOD OF RECOVERING GOLD FROM GOLD ORES CONTAINING PYRITE
This method for recovering gold from gold ore containing pyrite comprises: a pretreatment step which includes a first step in which gold ore containing pyrite is prepared and a second step in which the gold ore is heated to a temperature of at least 450°C in an inert atmosphere, and the pyrite in the gold ore is pyrolyzed into iron sulfide (II) and elemental sulfur, and which does not contain an oxidizing roasting step; a third step in which gold ore having been subjected to the pretreatment step is brought into contact with gold leaching solution containing chloride ions, bromide ions, and iron ions while being supplied with an oxidizing agent, thereby leaching out the gold component in the ore; a fourth step in which, after adding to the solution obtained by leaching the gold component in step 3, an oxidizing agent is added to adjust the redox potential to at least 520mV, reducing the quantity of monovalent copper ions in the gold leachate; and a fifth step in which the gold in the gold leachate obtained in the fourth step is adsorbed by activated carbon.
C22B 3/04 - Extraction of metal compounds from ores or concentrates by wet processes by leaching
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
Disclosed is a method of recovering gold from sulfide ores comprising: Step 1 for contacting a first acidic aqueous solution to sulfide ores with supplying an oxidizing agent to leach the copper content in the sulfide ores, said first acidic aqueous solution containing chlorine ions, copper ions and iron ions with no bromine ions; Step 2 for subjecting the leaching reaction solution thus obtained in Step 1 to solid-liquid separation to separate a leaching residue and a post-leaching solution; Step 3 for contacting a second acidic aqueous solution to said leaching residue thus obtained in Step 2 with supplying an oxidizing agent to leach the gold content in the residue, said second acidic aqueous solution containing chlorine ions, bromine ions, copper ions and iron ions; Step 4 for adding copper(I) chloride to the post-gold-leaching solution thus obtained in Step 3, and then adding an oxidizing agent to adjust the oxidation-reduction potential to 520 mV or greater, to thereby reduce monovalent copper ions in the post-gold-leaching solution; and Step 5 for adsorbing gold in the post-gold-leaching solution thus obtained in Step 4 to activated carbon.
C22B 3/04 - Extraction of metal compounds from ores or concentrates by wet processes by leaching
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
A method for processing arsenic which includes a roasting process in which an arsenic-containing copper ore is roasted in an inert gas atmosphere to separate chalcopyrite from a volatile matter containing sulfides of arsenic; and a heat treatment process in which sulfur and an antioxidant are added to the volatile matter obtained in the roasting process followed by heat-treating in the inert gas atmosphere for dissolving sulfides of arsenic in the volatile matter.
Gold included in metal sulfide can be efficiently adsorbed on activated carbon and gold and silver adsorbed on the activated carbon can be efficiently eluted. The method of eluting gold and silver comprises: leaching gold and silver using acidic leachate which includes chloride ions and/or bromide ions as anions and copper and iron as cations from sulfide ore bearing gold and silver to the acidic leachate by heating; adsorbing at least the gold and silver in the acidic leachate on activated carbon; and eluting gold and silver on activated carbon, on which at least the gold and silver are adsorbed, by using an aqueous thiosulfate solution that is maintained at less than pH 7.
C22B 3/04 - Extraction of metal compounds from ores or concentrates by wet processes by leaching
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
40.
METHOD FOR LEACHING GOLD FROM GOLD ORE CONTAINING PYRITE
Provided is a method for leaching gold from gold ore containing pyrite. Said method for leaching gold includes a pretreatment step that includes a step (1) in which gold ore containing pyrite is prepared, and a step (2) in which the gold ore is heated to 450°C or higher, and the pyrite in the gold ore is thermally decomposed into iron(II) sulfide and elemental sulfur. Said method for leaching gold further includes a leaching step that includes: a step (3) in which the pretreated gold ore is brought into contact with an iron leaching solution containing any one or more substances selected from sulfuric acid, hydrochloric acid, and Fe3+ aqueous salt solution to leach out iron components in the ore, and then solid-liquid separation is conducted on the iron leachate and residue; and a step (4) in which the residue obtained in step (3) is brought into contact with a gold leaching solution, which contains halide ions, copper ions and iron ions, while being supplied with an oxidant, to leach out gold components in the residue. Said method for leaching gold further includes an iron leaching solution regeneration step (5) in which the iron content is precipitated in an iron oxyhydroxide form, and removed from the iron leachate obtained in step (3).
A method for leaching gold from a gold ore containing pyrite, in which the gold leaching rate is improved without requiring the use of a highly toxic chemical substance such as cyan, thiourea, thiosulfuric acid and a halogen gas. A method for leaching gold, comprising: a pretreatment step comprising a step (1) of providing a gold ore containing pyrite and a step (2) of oxidizing and roasting the gold ore; and a step (3) of bringing the pretreated gold ore into contact with a gold-leaching solution containing a halide ion while supplying an oxidizing agent to thereby leach a gold component from the ore and then carrying out the solid/liquid separation of the resultant product into a solution having gold leached therein and an iron-containing residue.
A method for efficiently collecting high-purity silver from an acidic aqueous solution containing silver and at least one of iron and zinc with a simple device is provided. The method for collecting silver includes separating silver and at least one of iron and zinc from an acidic aqueous solution containing silver and at least one of iron and zinc by solvent extraction using tributyl phosphate as an extractant.
A method for efficiently collecting high-purity silver from an acidic aqueous solution containing silver and at least one of iron and zinc with a simple device is provided. The method for collecting silver includes separating silver and at least one of iron and zinc from an acidic aqueous solution containing silver and at least one of iron and zinc by solvent extraction using tributyl phosphate as an extractant.
C22B 3/38 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
Provided is a method for recovering gold, which enables the amount of gold adsorbed on activated carbon to be increased. The method for recovering gold includes: leaching gold into an acidic leaching solution containing chloride ions and/or bromide ions as anions and copper as cations for producing a gold leachate; and adsorbing gold in the gold leachate on activated carbon, wherein the method further comprises the step of adjusting the oxidation-reduction potential of the gold leachate (reference electrode: silver/silver chloride) prior to adsorbing gold in the gold leachate on the activated carbon for reducing a concentration of monovalent copper ions contained in the gold leachate.
C22B 3/04 - Extraction of metal compounds from ores or concentrates by wet processes by leaching
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
45.
METHOD FOR LEACHING GOLD FROM GOLD ORE CONTAINING PYRITE
The present invention improves the leaching speed of gold while also inhibiting the generation of sulfur dioxide in a method for leaching gold from gold ore containing pyrite without using highly poisonous chemicals such as cyanogen, thiourea, thiosulfuric acid, and halogen gas. A method for leaching gold involving: pre-treatment steps which include a step (1) for preparing a gold ore containing pyrite and a step (2) for heating the gold ore to 450°C or higher in a non-oxidizing atmosphere and for pyrolyzing the pyrite within the gold ore into iron sulfide (II) and elemental sulfur, and which does not include an oxidation roasting step; and a step (3) for leaching the gold component within the ore by bringing the gold ore that was subjected to the pre-treatment steps into contact with a gold leaching solution containing chloride ions, bromide ions, and iron ions while an oxidizing agent is supplied.
Gold and silver adsorbed on activated carbon are efficiently eluted. The method of eluting gold and silver adsorbed on activated carbon, the method comprises: eluting gold and silver on activated carbon, on which at least the gold and silver are adsorbed, by using an aqueous thiosulfate solution that is maintained at less than pH 7.
B01J 20/20 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising carbon obtained by carbonising processes
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
47.
METALLIC MATERIAL FOR ELECTRONIC COMPONENTS, AND CONNECTOR TERMINALS, CONNECTORS AND ELECTRONIC COMPONENTS USING SAME
The present invention provides a metallic material for electronic components having a low degree of whisker formation and a high durability, and connector terminals, connectors and electronic components using the metallic material. The metallic material for electronic components includes: a base material; on the base material, an lower layer constituted with one or two or more selected from the group consisting of Ni, Cr, Mn, Fe, Co and Cu; on the lower layer, an upper layer constituted with an alloy composed of one or both of Sn and In (constituent elements A) and one or two or more of Ag, Au, Pt, Pd, Ru, Rh, Os and Ir (constituent elements B), wherein the thickness of the lower layer is 0.05 µm or more; the thickness of the upper layer is 0.005 µm or more and 0.6 µm or less; and in the upper layer, the relation between the ratio, the constituent elements A/(the constituent elements A + the constituent elements B) [mass%] (hereinafter, referred to as the proportion of Sn + In) and the plating thickness [µm] is given by plating thickness <= 8.2 × (proportion of Sn + In) - 0.66 [herein, (the proportion of Sn + In) >= 10 mass%].
C23C 28/02 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of metallic material
H01B 1/02 - Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
H01B 5/02 - Single bars, rods, wires or strips; Bus-bars
H01B 7/00 - Insulated conductors or cables characterised by their form
H01R 13/03 - Contact members characterised by the material, e.g. plating or coating materials
H05K 1/09 - Use of materials for the metallic pattern
48.
METHOD OF RECOVERING GOLD ADSORBED ON ACTIVATED CARBON AND METHOD OF MANUFACTURING GOLD USING THE SAME
Gold adsorbed by activated carbon is efficiently recovered at low cost. The method of recovering gold comprises eluting gold adsorbed by activated carbon with an eluent prepared by adding thiosulfate to an acidic aqueous solution to obtain an acidic concentrated gold solution.
B01J 20/20 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising carbon obtained by carbonising processes
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
49.
METHOD OF RECOVERING GOLD AND METHOD OF MANUFACTURING GOLD USING THE SAME
Gold included in metal sulfide ore is efficiently recovered at low cost. The method of recovering gold comprises leaching gold using acidic leachate which includes chloride ions and/or bromide ions as anions and copper and iron as cations from gold-bearing sulfide ore to the acidic leachate onto heating; adsorbing the gold in the acidic leachate by activated carbon; and eluting the gold adsorbed on the activated carbon with an alkali solution to obtain a concentrated gold solution.
B01D 15/00 - Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
B01J 20/20 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising carbon obtained by carbonising processes
C02F 1/28 - Treatment of water, waste water, or sewage by sorption
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
50.
METAL MATERIAL FOR ELECTRONIC COMPONENT AND METHOD FOR MANUFACTURING THE SAME
There are provided a metal material for electronic component which has low insertability/extractability, low whisker formability, and high durability, and a method for manufacturing the metal material. The metal material for electronic components has a base material 11, an A layer 14 constituting a surface layer on the base material 11 and formed of Sn, In or an alloy thereof, and a B layer 13 constituting a middle layer provided between the base material 11 and the A layer 14 and formed of Ag, Au, Pt, Pd, Ru, Rh, Os, Ir or an alloy thereof, wherein the surface layer (A layer) 14 has a thickness of 0.002 to 0.2 µm, and the middle layer (B layer) 13 has a thickness of 0.001 to 0.3 µm.
C25D 7/00 - Electroplating characterised by the article coated
B32B 15/01 - Layered products essentially comprising metal all layers being exclusively metallic
B32B 15/04 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance
C25D 5/10 - Electroplating with more than one layer of the same or of different metals
H01R 13/03 - Contact members characterised by the material, e.g. plating or coating materials
H05K 1/09 - Use of materials for the metallic pattern
51.
HIGH-PURITY YTTRIUM, PROCESS OF PRODUCING HIGH-PURITY YTTRIUM, HIGH-PURITY YTTRIUM SPUTTERING TARGET, METAL GATE FILM DEPOSITED WITH HIGH-PURITY YTTRIUM SPUTTERING TARGET, AND SEMICONDUCTOR ELEMENT AND DEVICE EQUIPPED WITH THE METAL GATE FILM
Provided are high-purity yttrium and a high-purity yttrium sputtering target each having a purity, excluding rare earth elements and gas components, of 5 N or more and containing 1 wt ppm or less of each of Al, Fe, and Cu; a method of producing high-purity yttrium by molten salt electrolysis of a raw material being a crude yttrium oxide having a purity, excluding gas components, of 4N or less at a bath temperature of 500°C to 800°C to obtain yttrium crystals, desalting treatment, water washing, and drying of the yttrium crystals, and then electron beam melting for removing volatile materials to achieve a purity, excluding rare earth elements and gas components, of 5N or more; and a technology capable of efficiently and stably providing high- purity yttrium, a sputtering target composed of the high-purity yttrium, and a metal- gate thin film mainly composed of the high-purity yttrium.
C25C 3/34 - Electrolytic production, recovery or refining of metals by electrolysis of melts of metals not provided for in groups
52.
METHOD FOR PRODUCING HIGH-PURITY LANTHANUM, HIGH-PURITY LANTHANUM, SPUTTERING TARGET FORMED FROM HIGH-PURITY LANTHANUM, AND METAL GATE FILM HAVING HIGH-PURITY LANTHANUM AS MAIN COMPONENT
The present invention addresses the problem of providing a technique capable of efficiently and stably providing a method for producing high-purity lanthanum, the method characterized in that: a crude lanthanum oxide starting material having a purity of 2N-3N, excluding gas components, is used; the material is subjected to molten salt electrolysis at a bath temperature of 450- 700°C to produce lanthanum crystals; the lanthanum crystals are subsequently desalted: and electron beam melting is then performed to remove volatile substances. The present invention also addresses the problem of providing a technique capable of efficiently and stably providing high-purity lanthanum, high-purity lanthanum itself, a sputtering target formed from high-purity material lanthanum; and a thin film for metal gates that has high purity lanthanum as the main component.
A recovery method for cobalt, wherein copper is removed from acid aqueous solution in which copper and cobalt are contained and concentration rate of Cu/Co is more or equal to 5, by a combination of a solvent extraction using cationic exchange extracting agent and a adsorption using cationic exchange resin, and then cobalt is recovered as electrolytic cobalt by a combination of a solvent extraction and an electrowinning, and (1) the acid aqueous solution contains more or equal to 10g/L of copper and less or equal to 5g/L of cobalt, (2) the cationic exchange extracting agent is an oxime series extract agent, and (3) the cationic exchange resin is an acid chelate resin.
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
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
C22B 3/26 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
C22B 3/42 - Treatment or purification of solutions, e.g. obtained by leaching by ion-exchange extraction
A recovery method for cobalt, wherein copper is removed from acid aqueous solution in which a concentration of copper is more or equal to 10g/L, a concentration of cobalt is less or equal to 5g/L and concentration rate of Cu/Co is more or equal to 5 by a combination of a solvent extraction using an extract agent except oxime series extract agents and a resin adsorption, and then cobalt contained in the copper-removed solution is recovered as electrolytic cobalt by a combination of a solvent extraction and an electrowinning.
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
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
C22B 3/26 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
The object of the present invention is to provide a method of efficiently leaching copper not only from a readily-soluble copper ore but also a poorly-soluble copper sulfide ore partially containing or consisting of chalcopyrite and/or covellite by means of ore heap leaching under versatile conditions for actual operation. This invention relates to a method of leaching copper from a copper sulfide ore, comprising leaching copper from an ore comprising a copper sulfide ore by heap or dump leaching with the use of a sulfuric acid solution containing ferric (III) ions and iodide ions at a total iodine concentration of 8 to 100 mg/L as a leaching solution.
The present invention provides a method of recovering silver safely and efficiently from a chloride or bromide bath containing various metals. Specifically, a method of recovering silver from a hydrochloric acid solution containing alkali and/or alkali earth metal chloride, silver, copper and iron ions, comprising the steps of: (1) bringing the solution into contact with a strong-base anion-exchange resin to adsorb silver, copper, and iron on the anion-exchange resin; (2) then washing the anion-exchange resin with water to remove the adsorbed copper and iron; and (3) then bringing the ion- exchange resin into contact with a hydrochloric acid solution to elute the adsorbed silver, is provided.
A process for recovering copper from an acid aqueous solution containing cupric chlorides and alkali metal and/or alkali earth metal chlorides by a solvent extraction with a cation-exchange extractant, comprising the step of processing a solvent extraction in the presence of sulfate ions.
The copper sulfide ore is leached in the halide bath without using a special oxidant but with the use of only air. The copper and gold in the copper sulfide ore can be leached at high leaching ratio. The treating steps are as follows. (1) Copper leaching process (CL). The raw material is charged into the first acidic aqueous solution, which contains cupric chloride, ferric chloride, 7 g/L of hydrochloric acid, and sodium chloride. The post-leach liquor contains copper in cuprous state ions and copper in cupric state ions. (2) Solid-Liquid separation step. The resultant solid and liquid of CL step are separated. (3) Air oxidation step (OX). Air is blown into the post solid-liquid separation liquor. The copper in cuprous state ions are oxidized to the copper in cupric state ions. The iron leached in the step (1) is oxidized. Simultaneously, the impurities leached in the step (2) are precipitated. (4) Copper extracting step (CEX). The copper is recovered from the post-liquor of the step (3) (5) Gold recovering step (AL). The residue separated in the step (2) is added to the leach liquor similar to that of the step (1). The steps (1) and (5) are carried out under the atmospheric pressure and at the temperature of boiling point or lower, while blowing air into the leach liquor.
C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
C22B 3/22 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
A process of leaching gold comprising the steps of: a) leaching copper from copper sulfide ore material that contains gold or contains silicate ore containing gold until the copper grade is reduced to 7.9wt% or less; b) mixing the resulting material having a copper grade of 7.9 wt % or less with a gold leaching solution selected from the group consisting of a first solution containing chloride ions and ferric ions, and a second solution containing chloride ions and iron ions, the iron ions having been oxidized to trivalent ferric ions by air bubbled into the second solution; c) adjusting the pH of the gold leaching solution to 1.9 or less with stirring to leach at least gold in the material into the gold leaching solution by the oxidative activity of the ferric ions contained in the gold leaching solution, wherein the concentration of gold is reduced by selectively removing gold from part or all of the gold leaching solution during gold leaching. This process efficiently leaches at least copper and gold from a copper sulfide ore.
A method of obtaining copper from feedstock includes: providing the feedstock into acid solution including chloride and bromide of one of alkali metal and alkali earth metal, and one of chloride of copper and iron and bromide of copper and iron; leaching monovalent copper and divalent copper with use of oxidizing power of an iron ion and / or copper ion, with air being blown into the acid solution under and atmospheric pressure at a temperature less than a boiling point of the acid solution; solid- liquid separating the acid solution; blowing air into the solution and oxidizing copper in the solution; coprecipitating iron and impurity; separating deposition including coprecipitate obtained in the coprecipitating from the solution after the coprecipitating; extracting copper from the solution after the separating; obtained the extracted copper into sulfuric acid solution as copper sulfate; and obtaining copper from the copper sulfate.
Provided is a method of recovering valuable metal from oxide system scrap including the steps of performing electrolysis using an insoluble electrode as an anode and an oxide system scrap as a cathode, and recovering the scrap of the cathode as metal or suboxide. Specifically, this method enables the efficient recovery of valuable metal from oxide system scrap of an indium-tin oxide (ITO) sputtering target or oxide system scrap such as mill ends that arise during the production of such a sputtering target.
The present invention provides a method for manufacturing scorodite in which scorodite may be obtained. at high production efficiency and a high As concentration ratio. The present invention provides a method for manufacturing crystalline scorodite from acidic aqueous solution containing pentavalent As and trivalent Fe, the method comprising a step for adding a basic sodium compound to the acidic aqueous solution such that the sodium concentration in the acidic aqueous solution becomes larger than 0 g/L and equal to or less than 4 g/L.
C30B 7/14 - Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions the crystallising materials being formed by chemical reactions in the solution
C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
Proposed is a method of recovering valuable metal from scrap containing conductive oxide including the steps of using an insoluble electrode as either an anode or a cathode, using a scrap containing conductive oxide as the counter cathode or anode, performing electrolysis while periodically inverting the polarity, and recovering the scrap as hydroxide. With the foregoing method of recovering valuable metal from scrap containing conductive oxide, oxide system scrap is conductive oxide and a substance that can be reduced to metal or suboxide with hydrogen. This method enables the efficient recovery of valuable metal from sputtering target scrap containing conductive oxide or scrap such as mill ends of conductive oxide that arise during the production of such a sputtering target.
Proposed is a method of recovering valuable metal from scrap containing conductive oxide including the steps of using scrap containing conductive oxide and performing electrolysis while periodically inverting the polarity, and recovering the scrap as hydroxide. With the foregoing method of recovering valuable metal from scrap containing conductive oxide, oxide system scrap is conductive oxide and a substance that can be reduced to metal or suboxide with hydrogen. This method enables to efficiently recover valuable metal from sputtering target scrap containing conductive oxide or scrap such as mill ends of conductive oxide that arise during the production of such a sputtering target.
Proposed is a method for collecting valuable metal from an ITO scrap by subjecting to ITO scrap to electrolysis and collecting the result as metallic indium. specifically, the present invention proposes a method for selectively collecting metallic indium including the steps of subjecting the ITO scrap to electrolysis in an electrolytic bath partitioned with a diaphragm or an ion-exchange membrane, subsequently extracting anolyte temporarily, eliminating tin contained in the anolyte by a neutralization method, a replacement method or other methods, placing a solution from which the tin was eliminated in a cathode side again and performing electrolysis thereto; or a method for collecting valuable metal from an ITO scrap including the steps of obtaining a solution of in or Sn in an ITO electrolytic bath, eliminating the Sn in the solution, and collecting in in the collecting bath. These methods enable the efficient collection of metallic indium from an ITO scrap of an indium-tin oxide (ITO) sputtering target or an ITO scrap such as ITO mill ends arisen during the manufacture of such ITO sputtering target.
In a method for leaching gold from copper sulfides, the sulfide ores are first subjected to leaching of copper, thereby producing a leaching residue having 7.9% or less of the copper content. This leaching residue is mixed with a leach liquor, which contains the chloride ion and ferric ion and has 1.9 or less of pH. Gold and copper can be effectively leached from the copper sulfide ores. Ordinarily used oxidizing reagents such as hydrogen peroxide or nitric acid are not used. The gold, copper and iron can, therefore, be leached in a single process and by using an identical leaching liquor. The rate of gold leaching reaction can be enhanced by the co-presence of either copper or bromide ion or both together with the chloride and iron ion.
A sputtering target for producing a metallic glass membrane characterized in comprising a structure obtained by sintering atomized powder having a composition of a ternary compound system or greater with at least one or more metal elements selected from Pd, Zr, Fe, Co, Cu and Ni as its main component (component of greatest atomic %), and being an average grain size of 50µm or less. The prepared metallic glass membrane can be used as a substitute for conventional high-cost bulk metallic glass obtained by quenching of molten metal. This sputtering target for producing the metallic glass membrane is also free from problems such as defects in the metallic glass membrane and unevenness of composition, has a uniform structure, can be produced efficiently and at low cost, and does not generate many nodules or particles. Further provided is a method for manufacturing such a sputtering target for forming the metallic glass membrane.
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
C22C 5/04 - Alloys based on a platinum group metal
Provided is a hydrogen separation membrane characterized by comprising a structure obtained by sintering atomized powder having a composition of Ni x M y Zr100-x-y (wherein M is Nb and/or Ta, 25 ~ x ~ 40, 25 ~ y ~ 40) and an average grain size of 50µm or less. The prepared hydrogen separation membrane does not require the use of costly Pd metal, and can be used as a substitute for conventional high-cost bulk metallic glass obtained by quenching of molten metal. This hydrogen separation membrane is free from problems such as defects in the hydrogen separation membrane and unevenness of composition, has a uniform structure, and is capable of separating hydrogen at low cost. Further provided are a sputtering target for forming such as hydrogen separation membrane and its manufacturing method.
B01D 53/22 - 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 diffusion
It is to provide a vapor phase growth apparatus which can perform vapor phase growth of a thin film having a good uniformity throughout a surface of a wafer. The vapor phase growth apparatus includes at least a sealable reactor, a wafer containing member (wafer holder) installed within the reactor and having a wafer mounting portion (pocket hole) on a surface thereof for holding a wafer, a gas supply member (gas inlet pipe) for supplying raw material gas towards the wafer, a heating member (heater) for heating the wafer, and a heat uniformizing member (susceptor) for holding the wafer containing member and uniformizing heat from the heating member, wherein raw material gas is supplied into the reactor in a high temperature environment while heating the wafer by using the heating member via the heat uniformizing member and the wafer containing member, to form a film grown on a surface of the wafer, and wherein a recess portion depressed in a dome shape is formed at a back side of the wafer containing member.
H01L 21/205 - Deposition of semiconductor materials on a substrate, e.g. epitaxial growth using reduction or decomposition of a gaseous compound yielding a solid condensate, i.e. chemical deposition
It is to provide a vapor phase growth method in which an epitaxial layer consisting of a compound semiconductor such as InAlAs, can be grown, with superior reproducibility, on a semiconductor substrate such as Fe-doped InP. In vapor phase growth method for growing an epitaxial layer on a semiconductor substrate, a resistivity of the semiconductor substrate at a room temperature is previously measured, a set temperature of the substrate is controlled depending on the resistivity at the room temperature such that a surface temperature of the substrate is a desired temperature regardless of the resistivity of the semiconductor substrate, and the epitaxial layer is grown.
H01L 21/203 - Deposition of semiconductor materials on a substrate, e.g. epitaxial growth using physical deposition, e.g. vacuum deposition, sputtering
C23C 14/54 - Controlling or regulating the coating process
C30B 23/08 - Epitaxial-layer growth by condensing ionised vapours
patents
