| Patents for C22B 15 - Obtaining copper (5,364) |
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| 09/22/1987 | US4695317 Reducing agent |
| 09/22/1987 | CA1227041A1 Method for recovering metal values from materials containing copper and/or precious metals |
| 09/09/1987 | EP0235188A1 Grain refining of copper-based alloys. |
| 09/09/1987 | CN86107592A Immersion combustion in melt substance |
| 08/18/1987 | CA1225527A1 Method for producing blister copper |
| 08/11/1987 | US4685965 Molasses, lignin or methanol as reducing agents; copper melt |
| 08/11/1987 | CA1225242A1 High temperature softening of lead bullion |
| 08/11/1987 | CA1225241A1 Process of recovering copper and of optionally recovering silver and gold by a leaching of oxide- and sulfide-containing materials with water-soluble cyanides |
| 08/04/1987 | US4684402 Method of waste disposal, and apparatus for the same |
| 08/04/1987 | CA1224926A1 Method for working-up complex sulphidic ore concentrates |
| 07/28/1987 | US4683310 Recovering metals from ores |
| 07/07/1987 | US4678507 Treatment of dross |
| 06/30/1987 | US4676828 Process for the leaching of sulphides containing zinc and iron |
| 06/30/1987 | CA1223545A1 Electrolytic nickel bath containing coumarin compound and aryl hydroxy carboxylic acid compound |
| 06/24/1987 | EP0226295A2 Method for prevention of metallic precipitate reoxidation/redissolution in aqueous systems |
| 06/24/1987 | EP0225998A1 Submerged combustion in molten materials |
| 06/09/1987 | US4671945 Method for separation and leaching of the valuable metals in sulphide materials |
| 06/02/1987 | US4670051 Oxidation process for releasing metal values in which nitric acid is regenerated in situ |
| 06/02/1987 | CA1222380A1 Method for processing copper smelting materials and the like containing high percentages of arsenic and/or antimony |
| 05/19/1987 | US4666132 Method and apparatus for the pyrometallurgical treatment of fine grained solids to produce molten products |
| 05/19/1987 | US4665842 Apparatus for producing ignitable solids-gas suspensions |
| 05/12/1987 | US4664810 Method of separating heavy metals from complex-forming substances of aminocarboxylic acid type, or salts thereof in aqueous solutions |
| 05/06/1987 | EP0220198A1 Preparing metal compounds by pyrolysis. |
| 04/28/1987 | US4661153 Refractory porous plug |
| 04/28/1987 | US4661152 Oxygen-enriched gas and air, from matte |
| 04/23/1987 | WO1987002273A1 Separation process |
| 04/23/1987 | DE3539164C1 Process and smelting furnace for producing non-ferrous metals |
| 04/21/1987 | US4659375 Method of heating, melting and coal conversion |
| 04/21/1987 | CA1220631A1 Continuous copper smelting and converting in a single furnace by oxygen injection |
| 04/15/1987 | CN85107626A Process for the pressure oxidation of acid leaching of non-ferrous metal and iron-containing sulphide |
| 04/14/1987 | US4657586 Refining copper by injection of oxygen and fuels to oxidize and reduce impurities |
| 04/09/1987 | WO1987002068A1 Method for separation and recovery of metals from mixtures of metal sulfides such as lead ores |
| 04/07/1987 | US4655928 Recycling |
| 04/07/1987 | US4655829 Metal recovery process |
| 04/07/1987 | US4655437 Vertical shaft with plasma arc that melts and vaporizes |
| 04/01/1987 | CN85106965A Method for recovering the valuable metal content of contaminated copper raw material |
| 03/24/1987 | US4652299 Process for treating metals and alloys for the purpose of refining them |
| 03/18/1987 | EP0214324A1 Method for separation and leaching of the valuable metals in metal sulphide materials |
| 03/18/1987 | EP0214268A1 A method for working-up waste products containing valuable metals. |
| 03/17/1987 | CA1219134A1 Process for the selective dissolution of lead from mixed minerals containing zinc |
| 03/17/1987 | CA1219121A1 Method for recovering heat from dust-bearing gases produced in smelting sulphide concentrates and means hereof |
| 03/10/1987 | CA1218980A1 Catalyst |
| 03/10/1987 | CA1218961A1 Mineral separation |
| 03/04/1987 | CN85106114A Smelting process for recovering metals from non-ferrous metal oxide ores or concentrates and/or from fine-grained non-ferrous metal sulfide ores or concentrates |
| 02/26/1987 | WO1987001138A1 Grain refining of copper-based alloys |
| 02/24/1987 | US4645532 Production of fine spherical copper powder |
| 02/24/1987 | US4645186 Apparatus for processing sulphide concentrates and sulphide ores into raw material |
| 02/24/1987 | CA1218238A1 Method of processing sulphide copper and/or sulphide copper-zinc concentrates |
| 02/03/1987 | CA1217346A1 Hydrometallurgical recovery of metal values from copper containing sulphide materials |
| 01/28/1987 | EP0209734A1 Process for the recovery of amine and metal compounds in the preparation of polyphenylene ether |
| 01/27/1987 | CA1217060A1 Metals recovery |
| 01/22/1987 | DE3525160A1 Pyrometallurgical furnace installation for smelting fusible materials such as ore concentrate |
| 01/14/1987 | EP0208132A1 Copper converter |
| 01/14/1987 | EP0040243B1 Process and apparatus for producing metals at porous hydrophobic catalytic barriers |
| 01/06/1987 | US4634467 Hydrometallurgical process for copper recovery |
| 12/30/1986 | US4632738 From sulfide concentrate, cation exchange membrane |
| 12/02/1986 | US4626279 Decomposition at low temperatures in the presence of oxygen |
| 12/02/1986 | CA1214647A1 Process for the continuous production of blister copper |
| 11/26/1986 | EP0202833A2 Composition and use of the composition for the extraction of metals from aqueous solutions |
| 11/25/1986 | CA1214580A1 Apparatus and method for copper recovery |
| 11/06/1986 | WO1986006361A1 Preparing metal compounds, alloys and metals by pyrolysis |
| 11/06/1986 | EP0159349A4 Processes for treating waste streams. |
| 11/04/1986 | US4620964 Process for the treatment of complex manganese ores, such as marine nodules |
| 10/29/1986 | EP0199441A1 Reductive smelting of sulfides and a burner therefor |
| 10/29/1986 | CN86102264A Smelting process |
| 10/28/1986 | US4619838 Process for the deposition of metals on semiconductor powders |
| 10/28/1986 | US4619814 Roasting, leaching |
| 10/15/1986 | CN85102902A Process for boiling smelting |
| 10/14/1986 | CA1212542A1 Melting furnace of a rigid structure |
| 10/07/1986 | US4615729 Roasting sulfidic copper feed with s02 scavenger |
| 10/01/1986 | CN86100416A Apparatus for the pyrometallurgical processing of fine-grained solids to make molten products |
| 09/30/1986 | US4614542 Suppling, through a lance, a flux and cold charge in powdery form |
| 09/30/1986 | US4614541 Smelting under reducing, neutral, or oxidizing conditions |
| 09/24/1986 | EP0195650A2 Recovery of zinc from zinc-bearing sulphidic ores and concentrates by controlled oxidation roasting |
| 09/16/1986 | US4612171 Method for recovering metal values from materials containing copper and/or precious metals |
| 09/16/1986 | US4612168 Process for refining brass and aluminum scraps |
| 09/12/1986 | WO1986005211A1 A method for working-up waste products containing valuable metals |
| 09/10/1986 | EP0193976A1 Apparatus for the pyrometallurgical treatment of fine-granular solid materials to obtain fused products |
| 09/09/1986 | US4610723 Process for leaching sulphide concentrates of the tetrahedrite type containing high concentrations of arsenic and antimony |
| 09/03/1986 | CN85107375A Apparatus for producing ignitable solids-gas suspensions |
| 09/02/1986 | CA1210592A1 Production of copper sulphate solution from a bed of metallic copper particles containing insoluble material |
| 08/26/1986 | US4608083 Method for recovering the valuable metal content of contaminated copper raw material |
| 08/26/1986 | US4607825 Ladle for the chlorination of aluminium alloys, for removing magnesium |
| 08/19/1986 | US4606764 Method of recovering metals from ores using a formate reducing agent |
| 08/19/1986 | US4606763 Using autoclave with successive compartments the first being largest in size |
| 08/19/1986 | US4606760 Method and apparatus for simultaneously separating volatile and non-volatile metals |
| 07/29/1986 | US4602820 Recovering metal values from geothermal brine |
| 07/22/1986 | US4601460 Technique for removing impurities from a copper melt |
| 07/15/1986 | US4600704 Catalyst |
| 07/15/1986 | CA1207537A1 Hydrogenation of carbonaceous material |
| 07/08/1986 | US4599108 Method for processing sulphide concentrates and sulphide ores into raw material |
| 07/08/1986 | CA1207152A1 Process for recovering metals of high commercial value contained in a mud |
| 06/18/1986 | EP0185004A1 A method for processing of secondary metallic copper-containing smelt materials |
| 06/17/1986 | CA1206008A1 Recovery of zinc from zinc-containing sulphidic material |
| 06/10/1986 | US4594132 Oxidizing with curric chlorid solution, acidification, separation, extraction, stripping and electrowinning |
| 06/04/1986 | EP0182892A1 A method and apparatus for separating metal particles. |
| 05/22/1986 | WO1986002949A1 Method for the treatment of metals and alloys for the refining thereof |
| 05/20/1986 | US4589915 Removing slag |
| 05/13/1986 | US4588436 Method of recovering metals from liquid slag |
| 05/06/1986 | US4587110 Process of recovering copper and of optionally recovering silver and gold by a leaching of oxide- and sulfide-containing materials with water-soluble cyanides |