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| Number | Title | Issue Date |
| 7736488 | 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 and direct electrowinning. More particularly, the present invention re... | 06/15/2010 |
| 7736487 | Process for recovery of copper from copper-bearing material using pressure leaching, direct electrowinning and 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 and direct electrowinning. More particularly, the present invention re... | 06/15/2010 |
| 7722756 | 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 of copper solvent/solution extraction techniques or apparatus. A proce... | 05/25/2010 |
| 7476308 | 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 of copper solvent/solution extraction techniques or apparatus. A proce... | 01/13/2009 |
| 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 of copper solvent/solution extraction techniques or apparatus. A proce... | 12/09/2008 |
| 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 cell. The present invention enables the production of high quality me... | 05/27/2008 |
| 7125604 | Insulated magnet wire A novel polymer coated magnet wire that includes an insulating polymeric coating on only one facet thereof. Such a magnet wire can be conventionally wound using current transformer manufacturing processes but can be produced at significantly lower cost due to the al... | 10/24/2006 |
| 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 controls sulfur levels by using solvent extraction 306 to remov... | 04/25/2006 |
| 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, dissolved in an aqueous acid solution, is subjected to electrowinning ... | 03/01/2005 |
| 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% oxygen by volume, to the slurry, and recovering copper from a biolea... | 12/21/2004 |
| 6680034 | Method for recovering metal values from metal-containing materials using high temperature pressure leaching The present invention relates generally to a process for recovering copper and other metal values from metal-containing materials through pressure leaching operations. In accordance with the various aspects of the present invention, metal-containing pregn... | 01/20/2004 |
| 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 Ti(IV) and an acid which forms stable and soluble salt of Ti(I... | 11/04/2003 |
| 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 particularly to an improvement which provides for increased coppe... | 07/29/2003 |
| 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 20. The conditions in the autoclave are controlled so that the... | 03/25/2003 |
| 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 about 0.5 square meter per gram. This invention also rela... | 11/27/2001 |
| 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 and the metal ion (m) is reduced according to the reaction 2... | 10/30/2001 |
| 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 metal-containing liquid filtrate portion and a concentrated so... | 10/23/2001 |
| 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 with an electrolytic solution comprising a nitrogen compoun... | 09/25/2001 |
| 6258245 | Copper leach process aids A method for enhancing the operation of an acid solvent extraction and electrowinning operation by inhibiting acidic aerosol formation, allowing increased acid concentration and allowing higher operating temperature is disclosed wherein an antifoam formul... | 07/10/2001 |
| 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 into the peripheral edge of said disk to cause a strip of cop... | 01/30/2001 |
| 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 kerosene, in which the improvement comprises application ... | 05/09/2000 |
| 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 particle size P80 of 20 microns or less; (b) leaching said c... | 11/30/1999 |
| 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 metals by leaching the metal containing source with a ferric f... | 08/10/1999 |
| 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 such compounds are thiourea, alkyl sulphonate surfactants... | 11/17/1998 |
| 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 at least one aqueous leaching solution to dissolve copper i... | 10/13/1998 |
| 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 material from the top of the leaching solution, separating ... | 07/14/1998 |
| 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 leaching the metal containing source with a ferric fluoborate/f... | 06/09/1998 |
| 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 wherein the electrolyte is flowing perpendicular to the cathode ... | 09/23/1997 |
| 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 solution to obtain a resulting pressure oxidation filtrate ... | 07/08/1997 |
| 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 mechanically prepared and divided into coarse and fine fractio... | 11/19/1996 |
| 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 separated and purified before being returned to the cathode tank ... | 10/29/1996 |
| 5520792 | Process for making copper metal powder, copper oxides and copper foil This invention is directed to a process for making copper metal powder from copper-bearing material, comprising: (A) contacting said copper-beating material with an effective amount of at least one aqueous leaching solution to dissolve copper ions in said... | 05/28/1996 |
| 5516408 | Process for making copper wire This invention relates to a process for making copper wire directly from a copper-bearing material, comprising: (A) contacting said copper-beating material with an effective amount of at least one aqueous leaching solution to dissolve copper ions into sai... | 05/14/1996 |
| 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 leachant according to the autooxidation or the autocatalytic ... | 11/22/1994 |
| 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 alternating electrodes of opposite polarity are placed, th... | 11/23/1993 |
| 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 or activated carbon powder into the acid to immediately ad... | 06/08/1993 |
| 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) heating of the metal/plastic waste in a heating bath in order to ... | 05/09/1989 |
| 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 the solution; (c) controlling the copper ion concentration in the solution b... | 03/25/1986 |
| 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 successfully in the recovery of the species from the inte... | 08/11/1981 |
| 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 which contains ammonia complexes of copper sulfate and coppe... | 08/21/1979 |
