| Patents for C22B 15 - Obtaining copper (5,364) |
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| 04/09/1996 | US5505925 Process for removing heavy metals from soil |
| 04/03/1996 | EP0703993A1 Method for treatment of residues from organochlorosilane and/or chlorosilansynthesis |
| 03/14/1996 | DE4435774C1 Sepn. of zinc from solns. and slurries contg. chromium, esp. waste water or galvanic slurry |
| 03/13/1996 | EP0700365A1 Method for recovering metals from solutions |
| 03/13/1996 | EP0700315A1 Multi-stage water treatment system |
| 02/29/1996 | WO1996006195A1 Process for blowing non-ferrous metal scrap and intermediate products from smelting works |
| 02/29/1996 | DE4429937A1 Verfahren zum Verblasen von NE-Metall-Schrott und Hütten-Zwischenprodukten A method of blowing of non-ferrous metal scrap and huts intermediates |
| 02/28/1996 | EP0698126A1 Method and facility for recovering at least one metal contained in waste and scrap from industrial products |
| 02/27/1996 | US5494649 Leaching copper, lead and tin with methanesulfonic acid |
| 02/20/1996 | US5492681 Mixing copper material, ammonia and ammonium salt to dissolve copper at a quick rate, heating and stirring while reacting with oxygen |
| 02/07/1996 | EP0695377A1 Process for making copper metal powder, copper oxides and copper foil |
| 02/01/1996 | WO1996002680A1 Apparatus and process for producing blister copper |
| 01/30/1996 | US5487819 Production of metals from minerals |
| 01/16/1996 | US5484579 One step, continuous process for conversion of sulfides to recoverable sulfates |
| 01/11/1996 | WO1996000802A1 Copper converting |
| 01/09/1996 | US5482534 Precipitation of iron and arsenic as ferric arsenate and extraction |
| 01/04/1996 | WO1996000309A1 Use of hydrocarbon-soluble aminomethylene phosphonic acid derivatives in the solvent extraction of iron ions from aqueous solutions |
| 01/04/1996 | DE4421932A1 Verfahren von kohlenwasserstofflöslichen Aminomethylenphosphonsäure-Derivaten zur solventextraktiven Abtrennung von Eisenionen aus wäßrigen Lösungen A method of hydrocarbon-soluble aminomethylenephosphonic acid derivatives for the solvent extraction of iron ions from aqueous solutions |
| 01/04/1996 | CA2193726A1 Use of hydrocarbon-soluble aminomethylene phosphonic acid derivatives in the solvent extraction of iron ions from aqueous solutions |
| 12/19/1995 | US5476994 Multi-step: screening, dewatering, settling, reacting with acid, neutralization, precipitation, drying |
| 12/19/1995 | US5476591 Liquid treatment system and method for operating the same |
| 12/13/1995 | EP0686205A1 Recovery of zinc values from a solution containing hydrocyanic acid |
| 12/12/1995 | US5474593 Agent for treating metal ions in an aqueous solution, process for producing the metal ion-treating agent and method for treating metal ions in an aqueous solution |
| 12/06/1995 | EP0685563A1 Copper smelting apparatus |
| 12/06/1995 | CN1112950A Chemical reducing solution for copper oxide |
| 12/05/1995 | US5472618 Acidifying the etching liquid, reducing with iron powder to precipitate copper |
| 11/29/1995 | CN1030400C Process of reducing nonferrous metal oxides in slags |
| 11/22/1995 | CN1030335C Double chamber furnace for matte melting compartment smelting |
| 11/21/1995 | EP0695377A4 Process for making copper metal powder, copper oxides and copper foil |
| 11/16/1995 | WO1995030471A1 Liquid treatment method and system |
| 10/31/1995 | US5462720 Biodgradation of metal ores by microorganisms, bacterial oxidation of ferrous ions to ferric ions for reuse |
| 10/31/1995 | CA1337456C Method of smelting metal oxide material |
| 10/26/1995 | WO1995028223A1 Leaching in the presence of abrasive |
| 10/26/1995 | CA2188398A1 Leaching in the presence of abrasive |
| 10/18/1995 | EP0677118A1 Hydrometallurgical recovery of metals from complex ores. |
| 10/17/1995 | US5458746 Leaching |
| 10/12/1995 | WO1995027086A1 Method for treatment of residues from organochlorosilane and/or chlorosilansynthesis |
| 10/05/1995 | WO1995026418A1 Hydrometallurgical extraction process |
| 10/03/1995 | CA1337156C Method and apparatus for the conversion of non-ferrous molten metal matte |
| 09/28/1995 | WO1995025595A1 Method and device for treating composite elements |
| 09/28/1995 | DE4421360A1 Grinding and classification of scrap composite materials |
| 09/28/1995 | DE19509808A1 Separating and recovering the components of composites |
| 09/13/1995 | EP0670911A1 Process to convert non-ferrous metal such as copper or nickel by oxygen enrichment |
| 09/12/1995 | US5449395 Improved efficiency, pollution control |
| 08/24/1995 | DE19505339A1 Suspension melting of finely divided sulphur-contg. ores |
| 08/23/1995 | CN1107183A Method and apparatus for suspension smelting |
| 08/22/1995 | US5443622 Hydrometallurgical processing of impurity streams generated during the pyrometallurgy of copper |
| 08/10/1995 | WO1995021132A1 Method for recovering metals from solutions |
| 08/10/1995 | DE19503186A1 Chemische Reduzierungslösung für Kupferoxid Chemical reduction solution for copper |
| 07/25/1995 | US5435833 Oxidation of iron |
| 07/25/1995 | CA1336361C Process for preparing metal particles |
| 07/20/1995 | WO1995019236A1 Manufacture of copper rod |
| 07/11/1995 | US5431788 Chloride assisted hydrometallurgical copper extraction |
| 07/11/1995 | US5431711 Iron oxide to iron |
| 06/27/1995 | US5427606 Stripping cyano-base metal complexes leaving adsorbed cyano-noble metal complexes |
| 06/21/1995 | EP0658215A1 Extraction or recovery of metal values |
| 05/02/1995 | US5411575 Treatment of ores for copper and gold with cyanide |
| 04/25/1995 | CA1335331C Non-ferrous metal recovery from metallurgical slag |
| 04/19/1995 | EP0648849A1 Copper refining furnace |
| 04/12/1995 | EP0647721A2 Agent for treating metal ions in an aqueous solution, process for producing the metal ion-treating agent and method for treating metal ions in an aqueous solution |
| 04/11/1995 | US5405121 Apparatus to indicate the oxygen content of molten copper using the vibration signal of a graphite rod immersed into the molten metal |
| 04/06/1995 | WO1995009250A1 Process to convert non-ferrous metal such as copper or nickel by oxygen enrichment |
| 04/05/1995 | EP0646185A1 Production of metals from minerals |
| 04/04/1995 | US5403382 Increasing the copper production by bubbling air to increase the copper sulfate and iron interaction |
| 03/22/1995 | CN1027978C Method and apparatus for manufacturing of high-grade nickel matte |
| 03/21/1995 | US5398915 Apparatus for continuous copper smelting |
| 03/14/1995 | US5397380 Recovery of metal values |
| 03/08/1995 | EP0641394A1 Oxygen smelting. |
| 03/08/1995 | EP0641393A1 Method for melting copper |
| 02/08/1995 | EP0637635A2 Metal leaching and recovery process |
| 02/07/1995 | US5387273 Process for removing copper in a recoverable form from solid scrap metal |
| 01/10/1995 | US5380353 Anode furnace |
| 01/09/1995 | CA2126899A1 Metal leaching and recovery process |
| 01/04/1995 | CN1027292C Mixed with reaction hydrogen and floating by air to obtain copper powder and the replacement equipment |
| 12/20/1994 | US5374299 In-flight oxidation in first reaction zone; sulfidation or reduction of reaction products in second zone |
| 12/20/1994 | US5374298 Does not require holding blister melt prior to refining at anode furnace; efficient |
| 12/14/1994 | CN1026997C Process for continuous copper smelting |
| 12/13/1994 | US5372684 Process for the direct electrochemical refining of copper scrap |
| 12/08/1994 | WO1994028183A1 Method and facility for recovering at least one metal contained in waste and scrap from industrial products |
| 12/08/1994 | WO1994027711A1 Multi-stage water treatment system |
| 12/06/1994 | US5370369 Multipurpose burner designed for adjusting the supply of a reaction gas to be fed into a smelting furnace |
| 11/22/1994 | US5366612 Process for making copper foil |
| 11/22/1994 | US5366599 Recovering copper, leaching with copper/II/ amine complex, electrowinning |
| 11/15/1994 | US5364449 Process for refining crude material for copper or copper alloy |
| 11/15/1994 | US5364444 Metal leaching and recovery process |
| 11/02/1994 | EP0658215A4 Extraction or recovery of metal values. |
| 10/27/1994 | WO1994024338A1 Process for making copper foil |
| 10/27/1994 | WO1994024334A1 Process for making copper metal powder, copper oxides and copper foil |
| 10/19/1994 | EP0619764A1 Process for removing heavy metals from soils. |
| 10/18/1994 | US5356457 Hydrometallurgical process for the treatment of copper-bearing ore |
| 09/21/1994 | CN1025963C Bottom blow molten pool copper smelting method and the equipment therefor |
| 09/20/1994 | US5348713 Leaching with aqueous sulfuric acid, treating leach slurry with zinc concentrate under oxidizing and then reducing conditions, zinc flotation, reducing leach, copper flotation, liquid-solid separation, lead flotation, recovery of zinc |
| 09/14/1994 | CN1092111A New process for extracting copper from underground water of copper mine |
| 09/08/1994 | DE4405022A1 Method for extracting metals which can be utilised safely from radioactively contaminated mixed metal scrap |
| 09/06/1994 | US5344479 Leaching with sulfuric acid, oxidation |
| 09/01/1994 | WO1994019500A1 Recovery of zinc values from a solution containing hydrocyanic acid |
| 08/31/1994 | CN1025793C Apparatus for continuous copper smelting |
| 08/26/1994 | CA2090348A1 Recovery of zinc values from a solution containing hydrocyanic acid |
| 08/24/1994 | CN1091157A Production of metal from minerals |
| 08/04/1994 | WO1994017216A1 Hydrometallurgical recovery of metals from complex ores |