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7494580 |
System and method for producing copper powder by electrowinning using the ferrous/ferric anode reaction
The present invention relates, generally, to a method for electrowinning copper powder, and more particularly to a method for electrowinning copper powder from a copper-containing solution using...
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7485216 |
Process for recovery of copper from copper-bearing material using pressure leaching, direct electrowinning and solvent/solution extraction
The present invention relates generally to a process for recovering copper and/or other metal values from a metal-bearing ore, concentrate, or other metal-bearing material using pressure leaching...
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7479262 |
Method for separating platinum group element
One object of the present invention is to provide a separation process that enables the efficient separation of selenium, tellurium, and platinum group elements from a material containing...
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7465386 |
Electrolytic method in diaphragm-type cell
In a metal-winning method, copper ore or copper-ore concentrates is effectively hydraulically leached in a chloride leach liquor and the resultant leached liquor is diaphragm-electrolyzed. A...
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7462272 |
Process for multiple stage direct electrowinning of copper
A system and process for recovering copper from a copper-containing ore, concentrate, or other copper-bearing material to produce high quality cathode copper from a leach solution without the use...
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7452455 |
System and method for producing metal powder by electrowinning
This invention relates to a system and method for producing a metal powder product using either conventional electrowinning or alternative anode reaction chemistries in a flow-through...
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7378010 |
System and method for producing copper powder by electrowinning in a flow-through electrowinning cell
This invention relates to a system and method for producing a metal powder product using conventional electrowinning chemistry (i.e., oxygen evolution at an anode) in a flow-through electrowinning...
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7033480 |
Process for recovering platinum group metals from material containing base metals
The process of the present invention recovers platinum group metal(s), such as platinum and palladium, from PGM-containing materials containing base metals, such as copper and nickel. The process...
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6860983 |
Recovery and re-use of anode oxygen from electrolytic cells
A process and apparatus for recovering a metal from a feedstock containing a compound of the metal. The process includes an electrowinning step in which a leachate comprising a salt of the metal,...
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6833020 |
Recovery of copper from copper bearing sulphide minerals by bioleaching with controlled oxygen feed
A method of recovering copper from a copper bearing sulphide mineral which includes the steps of subjecting the slurry to a bioleaching process, supplying a feed gas which contains in excess of 21%...
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6641712 |
Process for the recovery of tin, tin alloys or lead alloys from printed circuit boards
A method for selective dissolution of tin and/or lead- or tin-containing alloys from printed circuit boards is provided comprising contacting a printed circuit board with a solution comprising...
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6599414 |
Solvent extraction processes for metal recovery
An improvement in the solvent extraction process for recovering metal values, i.e. copper, from acidic aqueous solutions containing copper and iron which may also include chloride, and more...
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6537440 |
Processing copper sulphide ores
A method for extracting copper from a mineral feed containing copper sulphide mineral 1 , which involves crushing and blending the feed 2, 6, 10 followed by leaching of the feed in an autoclave ...
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6322609 |
Low density high surface area copper powder and electrodeposition process for making same
This invention relates to a low density high surface area copper powder having an apparent density in the range of about 0.20 to about 0.60 gram per cubic centimeter, and a surface area of at least...
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6309531 |
Process for extracting copper or iron
A chemical process is disclosed for extracting copper or iron (M). The copper or iron is exposed to a leaching solution comprised of a metal salt (m) such that the copper or iron (M) is solvated...
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6306282 |
Sludge-free treatment of copper CMP wastes
Waste slurry containing dissolved metal from e.g., CMP is subjected to sludge-free processing. Embodiments include separating the waste slurry with a solids filter into a solids-free dissolved...
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6294071 |
Methods of forming copper solutions
Methods of dissolving copper into electrolytic solutions, such as solutions comprising nitrogen compounds, by supplying an anodic current to a copper or copper-containing metal that is in contact...
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6179988 |
Process for making copper wire
This invention relates to a process for making wire, comprising: (A) forming a circular disk of electrodeposited copper, (B) rotating said disk about its center axis; (C) feeding a cutting tool...
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6060029 |
Process for extraction of metals from aqueous ammoniacal solutions with beta-diketone extractants while maintaining a voltage potential to control entrainment of the aqueous layer into the organic layer
Improvement in the process of extracting metals, particularly copper, from aqueous ammoniacal solutions with beta-diketone extractants dissolved in a water immiscible hydrocarbon diluent, such as a...
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5993635 |
Atmospheric mineral leaching process
A method is provided for processing a sulphide mineral composition which at least partly comprises an iron-containing mineral. The method includes the steps of: (a) milling said composition to a...
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5935409 |
Fluoboric acid control in a ferric fluoborate hydrometallurgical process for recovering metals
A method is provided for the hydrometallurgical recovery of metal values from metal sources containing more than one metal such as antimony, lead, copper, zinc, bismuth, tin, cadmium and other...
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5837123 |
Prevention of cathode corrosion during electrowinning
A method to prevent corrosion of a stainless steel cathode in a copper electrowinning system uses compounds added to the electrowinning solution which reduce the level of free chlorine. Examples of...
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5820653 |
Process for making shaped copper articles
This invention relates to a process for making a shaped copper article directly from a copper-bearing material, comprising: (A) contacting said copper-bearing material with an effective amount of...
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5779877 |
Recycling of CIS photovoltaic waste
A method for extracting and reclaiming metals from scrap CIS photovoltaic cells and associated photovoltaic manufacturing waste by leaching the waste with dilute nitric acid, skimming any plastic...
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5762683 |
Ferric fluoborate/organic extractant hydrometallurgical process for recovering metals
A method is provided for the hydrometallurgical recovery of metal values from sources containing more than one metal of antimony, lead, copper, zinc, bismuth, tin, cadmium and other metals by...
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5670035 |
Method for recovering copper
An improved process is described for the recovery of copper from an aqueous feed solution using solvent extraction and electrowinning in which the electrowinning is conducted in a first step...
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5645708 |
Chloride assisted hydrometallurgical copper extraction
A process for the extraction of copper from a sulphide copper ore or concentrate comprises subjecting the ore or concentrate to pressure oxidation in the presence of oxygen and an acidic chloride...
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5575907 |
Process for the recovery of raw materials from presorted collected waste, especially scrap electrochemical batteries and accumulators
The invention relates to a process for the recovery of raw materials from presorted collected waste, especially scrap electrochemical batteries and accumulators in which the scrap (10)is first...
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5569370 |
Electrochemical system for recovery of metals from their compounds
An electrochemical system for the recovery of metals from metal ores in which reactions are carried out in separate anode and cathode tanks with the liquid product from the anode tank being...
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5366599 |
Method of selective recovery of ferrous and nonferrous metals from industrial wastes and scrap home electric appliances
After optional preliminary treatment, solid wastes are processed in accordance with the flowsheet FIG. 1: first, Cu is leached selectively with a leaching solution containing Cu(II) ammine as a...
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5264091 |
Method and an electrochemical installation for treating aqueous effluent containing a heavy metal
An electrochemical installation for treating aqueous effluent containing a heavy metal, the installation comprising an electroplating reactor for the heavy metal, itself comprising a tank in which...
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5217585 |
Transition metal decontamination process
Nickel (or other transition metal) contaminated with about 5 ppm technetium is decontaminated by dissolving the nickel and the technetium into an aqueous acid solution while introducing a graphite...
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4828661 |
Process for recovery of metals from metal/plastic waste
The invention relates to a process for recovery of metals from metal/plastic waste using used etching and washing solutions from the electronics industry, with the following process steps: (a)...
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4578162 |
Method for dissolving copper in the presence of iron
The invention is a method for dissolving copper in the presence of iron comprising: (a) contacting the copper with an oxidant solution; (b) dissolving at least a portion of the copper into...
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4283290 |
Purification utilizing liquid membrane with electrostatic coalescence
A liquid membrane technique is disclosed for recovery of dissolved species from aqueous solutions thereof in which, by appropriate tailoring of the emulsion, electrostatic precipitation can be used...
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4165264 |
Ammonia leaching
An improved process for obtaining copper from a copper sulfide, in which: the copper sulfide is treated with oxygen and an aqueous leaching solution of ammonium carbonate, to form a leach liquor...
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4153522 |
Sulfate precipitation during oxidative ammonium leach of Cu, Ni, Zn sulfide ores
In the recovery of copper, nickel or zinc from sulfide ores by leaching with ammonium sulfate solution containing free ammonia in the presence of oxygen to form a leach solution containing...
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4039406 |
Recovering copper from concentrates with insoluble sulfate forming leach
This invention provides a novel and an improved hydrometallurgical method for recovering copper values from copper concentrates. The method essentially comprises the following steps: A. forming an...
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4033763 |
Process for recovery of selected metal values from waste waters
A process for economically recovering metal values, especially precious metal values, from waste waters comprising a mixture of natural surface water, industrial waste water and organic waste,...
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4028202 |
Direct electrochemical recovery of copper from dilute ammoniacal solutions
A process for the direct electrochemical recovery of copper values from dilute ammoniacal leach liquors.
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3994789 |
Galvanic cementation process
In the disclosed process, the winning of noble or relatively electronegative metals (e.g. Au, Ag, Cu, Ni, etc.) from substantially aqueous solutions containing ions of the metal through the use of...
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3983017 |
Recovery of metal values from manganese deep sea nodules using ammoniacal cuprous leach solutions
A process in which copper, nickel, cobalt and molybdenum are recovered by direct leaching of comminuted raw manganese nodules with an aqueous ammoniacal leach solution containing cuprous ions....
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3880650 |
Recovery of copper from chalcopyrite
Copper concentrate is mixed with iron and a fusible salt or fusible salt mixture which is molten at the roasting temperature. The mixture is roasted in a non-oxidizing atmosphere at a temperature...
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3661740 |
RECOVERY OF COPPER FROM COPPER ORES
A method of recovering of oxidized copper from limestone gangue ores in which finely ground ore is leached with a caustic solution with gentle agitation and heat in stages, pregnant caustic...
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3463710 |
ELECTROLYTIC RECOVERY OF COPPER FROM COPPER CYANIDE LEACHING SOLUTIONS
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3254015 |
Process for treating platinum-coated electrodes
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2970096 |
Process and apparatus for treating oxidized copper ores
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3681055 |
Title is not available
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