| Patents for C22B 15 - Obtaining copper (5,364) |
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| 09/08/1992 | CA1307332C Automatic tuyere puncher |
| 09/01/1992 | US5143355 Apparatus for manufacturing oxygen-free copper |
| 08/26/1992 | EP0499928A1 Process for removal of copper ions from aqueous effluent |
| 08/25/1992 | US5141753 Method for utilizing the copper-arsenic precipitate created in the electroytic refining of copper in the production of anti-rot agents for wood |
| 08/18/1992 | US5139203 Method and device for recovery of scrap goods |
| 07/28/1992 | US5133873 Acidification and treatment of water with iron particles to remove copper ions |
| 07/22/1992 | EP0495223A1 Process for separating metalions more electropositive than iron from process andwaste waters |
| 07/08/1992 | CN1062557A Apparatus for continuous copper smelting |
| 07/08/1992 | CN1062556A Process for continuous copper smelting |
| 07/01/1992 | CN1017263B Nitrogen-blow fire refining technique of raw copper |
| 06/30/1992 | US5125963 Metallurgical controlling method |
| 06/23/1992 | CA1303862C Method for working-up waste products containing valuable metals |
| 06/23/1992 | CA1303861C Metallurgical controlling method |
| 05/27/1992 | EP0487032A1 Apparatus for continuous copper smelting |
| 05/27/1992 | EP0487031A1 Process for continuous copper smelting |
| 05/22/1992 | WO1992009370A1 Process and plant for recovering equipment scrap |
| 05/21/1992 | CA2055819A1 Copper smelting process |
| 05/16/1992 | WO1992008812A1 Base metals recovery by adsorption of cyano complexes on activated carbon. |
| 05/16/1992 | CA2096249A1 Base metals recovery by adsorption of cyano complexes on activated carbon |
| 05/05/1992 | US5110354 Closed loop copper cell extraction process |
| 04/28/1992 | US5108721 Leaching in dilute sulfuric acid to solubilize nickel, leaching again to solubilize copper and tellurium |
| 04/21/1992 | CA1298954C Compound containing ferric ferrous salt and a producing method thereof |
| 04/16/1992 | WO1992006227A1 Process and device for regenerating and recovering metals from chloride-containing solutions |
| 04/01/1992 | EP0478322A1 Pyrometallurgical process for treating a feed material |
| 03/31/1992 | US5101066 Hydroxamate ion binders |
| 03/24/1992 | CA1297681C Direct smelting process for sulfide ores |
| 02/20/1992 | DE4123004A1 Slag forming mixt. for fire refining - comprises red mud, calcium hydroxide or oxide, and/or carbonate, and electrolytic sludge |
| 02/19/1992 | CN1058808A Silver copper-smelting method double-chamber furnace mould |
| 01/21/1992 | US5082638 Process of recovering non-ferrous metal values, especially nickel, cobalt, copper and zinc, by using melt and melt coating sulphation, from raw materials containing said metals |
| 01/14/1992 | CA1294131C Process for reduction smelting of materials containing base metals |
| 01/07/1992 | WO1992001074A1 Reclamation of metal from scrap |
| 01/07/1992 | CA2086253A1 Reclamation of metal from scrap |
| 12/10/1991 | US5071989 Ionophores |
| 12/08/1991 | CA2018635A1 Process to recover pure copper during purification of zinc sulfate solution |
| 12/04/1991 | EP0459765A1 Method for recovery of copper from copper-containing materials |
| 12/01/1991 | CA2043473A1 Method for recovery of copper from copper-containing materials |
| 12/01/1991 | CA2043430A1 Process and removal of zinc and nickel from copper ammine sulfate solutions |
| 11/20/1991 | CN1014802B Recovery of copper, gold and silver by vulcanizing roasting at law temp.-ore dressing |
| 11/13/1991 | EP0220198B1 Preparing metal compounds by pyrolysis |
| 10/29/1991 | US5060913 Integrated metallurgical reactor |
| 10/22/1991 | CA1290943C Submerged combustion in molten materials |
| 10/01/1991 | CA1289780C Grain refining metals |
| 08/13/1991 | US5039497 Process for separating copper from aqueous base solutions |
| 08/06/1991 | US5037471 Method for manufacturing oxygen-free copper |
| 07/16/1991 | US5032175 Process for removing impurities from flue dusts |
| 07/03/1991 | CN1013055B Apparatus for the pyrometallurgical processing of fine-grained solids to make molten products |
| 06/20/1991 | DE4034606A1 Paper sheet alignment feed - has roller spindles in elongated holes in aligning straight edge |
| 06/16/1991 | WO1991009146A1 Recovery of metal values from zinc plant residues |
| 06/16/1991 | CA2076025A1 Recovery of metal values from zinc plant residues |
| 05/28/1991 | US5019161 Process for stripping plated plastic materials |
| 05/28/1991 | CA1284471C Separation process |
| 05/22/1991 | CN1012647B Method for recovering valuable metal content of contaminated copper raw material |
| 05/15/1991 | EP0427710A1 Smelting reduction |
| 04/17/1991 | CN1012355B Processing method for mineral materials containing copper oxide |
| 04/16/1991 | US5007959 Oxidation of sulfer and iron to sulfur dioxide and iron oxide |
| 04/03/1991 | EP0411060A4 Method and burner for melting copper |
| 03/21/1991 | WO1991003575A1 Integrated metallurgical reactor |
| 03/13/1991 | EP0416738A1 Nickel-copper matte converters employing nitrogen enriched blast |
| 03/06/1991 | EP0235188B1 Grain refining of copper-based alloys |
| 02/26/1991 | US4995984 Supported heteropolycyclic compounds in the separation and removal of late transition metals |
| 02/06/1991 | EP0411060A1 Method and burner for melting copper |
| 02/05/1991 | US4989839 Automatic tuyere puncher |
| 01/23/1991 | EP0372057A4 Depressant for flotation separation of polymetallic sulphidic ores |
| 01/23/1991 | CN1011294B Process for dressing copper oxide ore |
| 01/22/1991 | CA1279198C Zinc smelting process using oxidation zone and reduction zone |
| 01/08/1991 | US4983219 Technique for forming silicon carbide coated porous filters |
| 12/27/1990 | EP0403695A1 Process and plant for recycling scrap appliances |
| 12/18/1990 | US4978788 Copper as perchlorate using o-hydroxyaryloximes and branched aliphatic or aromatic alcohols or esters |
| 12/18/1990 | CA1277840C Method for continuous reduction of molten metallurgical slag in an electric furnace |
| 11/22/1990 | DE3690783C2 Oxide copper mineral concn. by flotation - involving pre-sulphidation with molten sulphur |
| 11/21/1990 | CN1010485B Process for the pressure oxidation of acid leaching of non-ferrous metal and iron-containing sulphide |
| 11/20/1990 | US4971662 Hydrometallurgical recovery of metal values from cooper containing sulphide materials |
| 11/14/1990 | EP0397327A1 Process for dissolving tin and tin alloys |
| 10/23/1990 | US4964920 Aqueous solution of nitric acid, ferric nitrate and anthra-nilic acid |
| 10/17/1990 | CN1010032B Immersion combustion in melt substance |
| 10/16/1990 | US4963264 Process for selective dialysis using polymeric affinity adsorbents and size selective membranes |
| 09/25/1990 | US4959102 Method for melting and refining copper metal |
| 09/13/1990 | DE4007835A1 Ore suspension smelting furnace - comprising side nozzles directed upwards to cause turbulence with flow from concentrate burner at top of shaft |
| 09/12/1990 | EP0233872B1 Method for the treatment of metals and alloys for the refining thereof |
| 09/04/1990 | US4954265 Removal of nickel and copper |
| 08/29/1990 | EP0384862A1 Copper-tin alloys, partly deoxidized with magnesium or calcium, for electrical and/or thermal conductors |
| 08/23/1990 | DE3918156C1 Recovery of copper when bus=bar is scrapped - by placing jaw round copper conductor to strip, using hydraulic system |
| 08/21/1990 | US4950326 Electroless metal deposition; polution control |
| 08/15/1990 | CA2010096A1 Process for removing impurities from flue dusts |
| 08/08/1990 | CN1044501A Method and apparatus for mfg. high-grade nickel matte |
| 07/31/1990 | CA1272020A1 Apparatus for the pyrometallurgical processing of fine-grained solids to make molten products |
| 06/26/1990 | CA1270638A1 Copper converter |
| 06/20/1990 | EP0373420A1 Process for the separation of copper from aqueous basic solutions |
| 06/13/1990 | EP0372057A1 Depressant for flotation separation of polymetallic sulphidic ores |
| 06/10/1990 | CA2004692A1 Process for separating copper from aqueous base solutions |
| 05/15/1990 | US4925488 Removal of copper from ferrous scrap |
| 05/09/1990 | CN1007923B Apparatus for producing ignitable solids-gas suspensions |
| 05/08/1990 | US4923686 Process for the extraction of metal values |
| 04/25/1990 | CN1041618A Method and burner for melting copper |
| 04/18/1990 | EP0363552A1 Process for preparing metal particles |
| 03/22/1990 | WO1990002909A1 Method and burner for melting copper |
| 03/07/1990 | EP0356943A1 Wear resistant metallurgical tuyere |
| 02/06/1990 | US4898368 Wear resistant metallurgical tuyere |
| 02/06/1990 | CA1265503A1 Composition and use of the composition for the extraction of metals from aqueous solutions |
| 01/23/1990 | US4895595 Oxidation and reduction zones |