| Patents for C22B 15 - Obtaining copper (5,364) |
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| 08/18/1998 | US5795482 Use of hydrocarbon-soluble aminomethylene phosphonic acid derivatives in the solvent extraction of iron ions from aqueous solutions |
| 08/18/1998 | US5795465 Process for recovering copper from copper-containing material |
| 07/29/1998 | EP0854765A1 Process for the production of ultrafine particles |
| 07/28/1998 | US5785935 Using liquid leachant |
| 07/28/1998 | US5785736 Elution from an ion exchange resins |
| 07/22/1998 | EP0853682A1 Process and apparatus for extracting metal |
| 07/15/1998 | EP0815269A4 Improved hydrometallurgical processing of impurity streams generated during the pyrometallurgy of copper |
| 07/08/1998 | CN1187221A Hydrometallurgical process for extraction of copper from sulphidic concentrates |
| 07/08/1998 | CN1187220A Chloride assisted hydrometallurgical extraction of metal |
| 07/02/1998 | WO1998028454A1 Improvement in the process of recovery of metals |
| 07/01/1998 | CN1186524A Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulfide minerals |
| 07/01/1998 | CN1186523A Chloride assisted hydrometallurgical extraction of metal |
| 06/30/1998 | US5772955 Apparatus for suspension smelting |
| 06/30/1998 | US5772730 Process for separating contaminants from organic phases during hydrometallurgical extraction of metals |
| 06/09/1998 | US5762683 Ferric fluoborate/organic extractant hydrometallurgical process for recovering metals |
| 05/26/1998 | US5758255 Opposite phase entrainment reduction in solvent extraction/electrowinning circuits by addition of water soluble cationic polymers |
| 05/14/1998 | WO1998019779A1 Improved leaching of mineral ores |
| 05/13/1998 | CN1038348C Prodn. of metal from minerals |
| 05/06/1998 | EP0809714A4 Modifiers for aldoxime extractant of metal values |
| 04/28/1998 | US5744107 Process for removing heavy metals from soil |
| 04/22/1998 | EP0836523A1 Process for making shaped copper articles |
| 04/21/1998 | US5741347 Method for producing copper powder |
| 04/16/1998 | WO1998015665A1 Method for downgrading high-melting materials by using a melting tank and an electro-reduction tank |
| 04/16/1998 | DE19643459A1 Verfahren zum Abreichern von hochschmelzenden Materialien A method for depleting refractory materials |
| 04/09/1998 | WO1998014741A1 Method for feeding and directing reaction gas and solids into a smelting furnace and a multiadjustable burner designed for said purpose |
| 04/09/1998 | WO1998014623A1 Hydrometallurgical extraction of copper, zinc and cobalt from ores containing manganese dioxide |
| 04/08/1998 | EP0833961A1 Ammoniacal metal solution recycling process |
| 04/07/1998 | US5736065 Aqueous solution of an alkali boron hydride mixed with a water-soluble polyoxyethylene chain-containing organic compound |
| 04/01/1998 | EP0832987A1 Lance for blowing oxygen onto liquid metal |
| 04/01/1998 | EP0832306A2 Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulphide ores |
| 04/01/1998 | EP0832303A1 Chloride assisted hydrometallurgical extraction of metal |
| 04/01/1998 | EP0832302A1 Chloride assisted hydrometallurgical extraction of metal |
| 04/01/1998 | EP0815270A4 Atmospheric mineral leaching process |
| 03/31/1998 | US5733500 Molten metal degassing and filtering apparatus |
| 03/31/1998 | US5733431 Method for removing copper ions from copper ore using organic extractions |
| 03/26/1998 | WO1998012360A1 Process for refining high-impurity copper to anode copper |
| 03/26/1998 | CA2267325A1 Process for refining high-impurity copper to anode copper |
| 03/24/1998 | US5730776 Oxidation pressure leach using sulfuric acid and carbonaceous additive |
| 03/11/1998 | CN1175982A Modifiers for aldoxime extractant of metal values |
| 03/05/1998 | WO1998008989A1 Method for microwave induced oxidation of sulphidic ore material in fluidized bed without sulphur dioxide emissions |
| 03/05/1998 | CA2263497A1 Method for microwave induced oxidation of sulphidic ore material in fluidized bed without sulphur dioxide emissions |
| 03/04/1998 | CN1175111A Method for recoverying copper from winding |
| 02/26/1998 | WO1998007900A1 Method for removing copper ions from copper ore using organic extractants |
| 02/25/1998 | CN1174576A Chloride assisted hydrometallurgical copper extraction |
| 02/24/1998 | CA2161308C Selective bismuth and antimony removal from copper electrolyte |
| 01/07/1998 | EP0815289A1 Process for electrowinning of copper matte |
| 01/07/1998 | EP0815270A1 Atmospheric mineral leaching process |
| 01/07/1998 | EP0815269A2 Improved hydrometallurgical processing of impurity streams generated during the pyrometallurgy of copper |
| 12/31/1997 | WO1997049836A1 Apparatus and method for copper extraction by in-situ electrolysis in heap-leaching of ores |
| 12/29/1997 | EP0813615A1 Hydrometallurgical process for the extraction of copper from sulphidic concentrates |
| 12/29/1997 | EP0813614A1 Method for recovering heavy metals from acid and ammonia solutions |
| 12/17/1997 | CN1167834A Liquid electric slag continuous refining process for composition copper |
| 12/16/1997 | US5698170 Leaching copper-containing material with acidic liquid, diluting copper-containing solution to reduce acid content, solvent extracting copper from diluted solution |
| 12/03/1997 | EP0809714A1 Modifiers for aldoxime extractant of metal values |
| 11/27/1997 | WO1997044499A1 Ferric fluoborate/organic extractant hydrometallurgical process for recovering metals |
| 11/27/1997 | WO1997044496A1 Process for the treatment of particulate matter by fluidisation, and vessel with apparatus to carry out the treatment |
| 11/27/1997 | CA2252849A1 Ferric fluoborate/organic extractant hydrometallurgical process for recovering metals |
| 11/26/1997 | CN1166198A Metal fusion furnace and metal fusing method |
| 11/26/1997 | CN1166186A Proces sof rmaking copper metal powder, copper oxides and copper foil |
| 11/20/1997 | DE19643834C1 Direct electrolytic refining of used copper@ cable scrap |
| 11/11/1997 | US5685892 Metallurgical furnace installation for use in copper smelting process and method for charging anode scrap into furnace |
| 11/06/1997 | WO1997040901A1 Method and apparatus for adjusting the boundary surface between two controllably flowing and mutually separable solutions and for conducting both solutions out of the separation part |
| 11/06/1997 | WO1997040900A1 Method and apparatus for recirculating a heavier solution from the separation part of two separable solutions into a mixing unit |
| 11/06/1997 | DE19718401A1 Removing metal impurities from silicon metalloid surface |
| 11/05/1997 | EP0804624A1 Chloride assisted hydrometallurgical copper extraction |
| 11/05/1997 | CN2266602Y Small size pyro-smelting furnace for matte |
| 11/05/1997 | CN2266601Y Small size pyro-converting furnace for raw copper |
| 10/29/1997 | EP0619764B1 Process for removing heavy metals from soils |
| 10/23/1997 | WO1997038771A1 Process for making shaped copper articles |
| 10/22/1997 | CN1162648A Method and apparatus for producing oxygenless copper from coarse copper |
| 10/21/1997 | US5679259 Method for recovering metals from solutions |
| 10/15/1997 | EP0801137A1 Process for recovering copper from insulated copper wire windings |
| 10/15/1997 | EP0758933A4 Manufacture of copper rod |
| 10/09/1997 | WO1997037048A1 Process for separating sulphide-containing materials using hydrogen peroxide |
| 10/08/1997 | EP0783594A4 Apparatus and process for producing blister copper |
| 10/08/1997 | EP0686205B1 Recovery of zinc values from a solution containing hydrocyanic acid |
| 10/07/1997 | US5674310 Adjusting flow rate of reaction gas fed into suspension smelting furnace steplessly by changing position of adjusting members installed in reaction gas channel near its end |
| 10/07/1997 | US5673900 Reclamation of metal from scrap |
| 10/02/1997 | DE19613746A1 Verfahren zur Auftrennung sulfidhaltiger Restprodukte des Bergbaus und der Metallverarbeitung A process for separating sulphide waste products of mining and metal processing |
| 09/23/1997 | US5670035 Solvent extraction, stripping, electrowinning |
| 09/23/1997 | US5670033 Process for making copper metal powder, copper oxides and copper foil |
| 09/17/1997 | EP0795046A1 Process for making copper metal powder, copper oxides and copper foil |
| 09/17/1997 | EP0751831B1 Method and device for treating composite elements |
| 09/16/1997 | US5667557 Hydrometallurgical extraction and recovery of copper, gold, and silver via cyanidation and electrowinning |
| 09/02/1997 | US5662730 Method for pyrometallurgical smelting of copper |
| 08/26/1997 | US5660806 Deleading by leaching, dissolving in hydrochloric acid or sulfuric acid and a salt of alkali metal, alkaline earth metal or ammonium, recovering from liquid phase |
| 08/19/1997 | US5658368 Reduced dusting bath method for metallurgical treatment of sulfide materials |
| 08/14/1997 | WO1997029215A1 Improved beta-diketones for the extraction of copper from aqueous ammoniacal solutions |
| 08/14/1997 | DE19605289A1 Production of copper from cleaned ore concentrates |
| 08/14/1997 | CA2243552A1 Improved beta-diketones for the extraction of copper from aqueous ammoniacal solutions |
| 08/07/1997 | WO1997028288A1 Oxygen smelting of copper and/or nickel sulphide ore concentrates |
| 07/30/1997 | EP0786529A1 Process for improving recovery of metals from sulphidic ores or bulk concentrates |
| 07/30/1997 | EP0786021A1 Process for making copper foil |
| 07/29/1997 | US5651807 Method for treatment of residues from organochlorosilane and/or chlorosilansynthesis |
| 07/22/1997 | US5650057 Chloride assisted hydrometallurgical extraction of metal |
| 07/17/1997 | WO1997025453A1 Process for electrowinning of copper matte |
| 07/17/1997 | WO1997025447A1 Method for recovering heavy metals from acid and ammonia solutions |
| 07/17/1997 | CA2214532A1 Process for electrowinning of copper matte |
| 07/16/1997 | EP0784193A1 Metal fusion furnace and metal fusing method |
| 07/16/1997 | EP0783594A1 Apparatus and process for producing blister copper |