| Patents for C22B 23 - Obtaining nickel or cobalt (3,818) |
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| 05/21/1991 | US5017220 Method for smelting reduction of Ni ore |
| 05/15/1991 | EP0427710A1 Smelting reduction |
| 05/07/1991 | US5013533 Process for recovering valuable metals from spent catalysts |
| 05/02/1991 | WO1991005879A1 Smelting of nickel laterite and other iron containing nickel oxide materials |
| 04/17/1991 | CN1012379B Microwave desulfurization plasma smelting of nickel matte |
| 03/13/1991 | EP0416738A1 Nickel-copper matte converters employing nitrogen enriched blast |
| 02/13/1991 | CN1011581B Production of elements and compounds by deserpentinization of ultramatic rock |
| 02/05/1991 | US4989839 Automatic tuyere puncher |
| 01/23/1991 | EP0372057A4 Depressant for flotation separation of polymetallic sulphidic ores |
| 01/22/1991 | CA1279197C Cobalt recovery method |
| 12/19/1990 | EP0402738A2 Nickel foam |
| 12/18/1990 | CA1277840C Method for continuous reduction of molten metallurgical slag in an electric furnace |
| 11/21/1990 | CN1010485B Process for the pressure oxidation of acid leaching of non-ferrous metal and iron-containing sulphide |
| 09/26/1990 | EP0364463A4 Separation and recovery of nickel and cobalt in ammoniacal systems |
| 09/19/1990 | CN1045423A Method for smelting reduction of ni ore |
| 09/18/1990 | US4957544 Lining durability; corrosion resistance |
| 09/18/1990 | US4957543 Nickel carbonyl decomposition on open-cell decomposable foam structure, sintering |
| 09/12/1990 | EP0386407A2 Method for smelting reduction of Ni ore |
| 09/12/1990 | EP0233872B1 Method for the treatment of metals and alloys for the refining thereof |
| 09/05/1990 | CN1045129A Method for smelting reduction of ni ore |
| 08/29/1990 | EP0384395A2 Method for smelting reduction of Ni ore |
| 08/08/1990 | CN1044501A Method and apparatus for mfg. high-grade nickel matte |
| 06/13/1990 | EP0372057A1 Depressant for flotation separation of polymetallic sulphidic ores |
| 04/25/1990 | EP0364463A1 Separation and recovery of nickel and cobalt in ammoniacal systems. |
| 03/13/1990 | US4908462 Cobalt recovery method |
| 03/06/1990 | CA1266368A1 Process of reducing higher metal oxides to lower metal oxides |
| 01/24/1990 | CN1039063A New processing technology for high ice nickel |
| 01/23/1990 | US4895595 Oxidation and reduction zones |
| 12/28/1989 | DE3920144A1 Orbital umgelagerte, monoatomare elemente, verfahrenzu ihrer herstellung und ihre weiterverarbeitung Orbital rearranged monoatomic, elements, verfahrenzu their production and their further processing |
| 12/13/1989 | EP0179865B1 Process for controlling slag chemistry in a refining vessel |
| 11/16/1989 | WO1989010791A1 Depressant for flotation separation of polymetallic sulphidic ores |
| 11/07/1989 | CA1262636A1 Pre-refining treatment of metals and alloys |
| 10/31/1989 | US4877517 Using crosslinked starch, polyacrylate, and lignin sulfonate |
| 10/05/1989 | WO1989009289A1 A 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 |
| 10/03/1989 | CA1262031A1 Production of elements and compounds by deserpentinization of ultramafic rock |
| 08/29/1989 | US4861371 Leaching nickel ore with sulfuric acid containing monovalent cation to suppress dissolution of aluminum |
| 08/15/1989 | US4857104 Process for reduction smelting of materials containing base metals |
| 07/26/1989 | EP0202311B1 Electrolytic reduction of cobaltic amine |
| 07/18/1989 | US4848754 Flash smelting furnace |
| 06/20/1989 | US4840776 Method for removing sodium and ammonia from cobalt |
| 06/20/1989 | US4840775 Method for removing sodium and chloride from cobaltic hydroxide |
| 05/16/1989 | US4830665 Process and unit for preparing alloyed and non-alloyed reactive metals by reduction |
| 04/25/1989 | US4824362 Method for operation of flash smelting furnace |
| 03/28/1989 | US4816236 Blending with alkali metal source, roasting, fusing, leaching with water, and filtration |
| 03/21/1989 | US4814004 Cleaning slag |
| 02/22/1989 | CN1031256A Microwave desulfurization plasma smelting of nickel matte |
| 02/07/1989 | US4803061 Desulfurization, demetallization |
| 02/07/1989 | CA1249885A1 Membrane processes for metal recovery and pollution control in metal process industries |
| 01/17/1989 | US4798717 Production of elements and compounds by deserpentinization of ultramafic rock |
| 01/17/1989 | US4798708 Process for recovering chromium and other metal values from chromium bearing material |
| 01/17/1989 | US4798532 Flash smelting furnace |
| 12/28/1988 | CA1247373A Method and apparatus for processing sulphide concentrates and sulphide ores into raw metal |
| 12/06/1988 | US4789580 Process of reducing higher metal oxides to lower metal oxides |
| 12/01/1988 | WO1988009389A1 Separation and recovery of nickel and cobalt in ammoniacal systems |
| 11/30/1988 | EP0292992A2 Non-ferrous metal recovery |
| 11/29/1988 | CA1245458A1 Process for the treatment of complex manganese ores, such as marine nodules |
| 08/16/1988 | CA1240594A1 Removal of hydrogen from cobalt and nickel metal by heat treating same in a rotary heat source |
| 08/09/1988 | US4762694 Molten salt extraction process for the recovery of valued transition metals from land-based and deep-sea minerals |
| 08/02/1988 | US4761177 Hydrogen reduction of sulfate solution in presence of base |
| 07/27/1988 | EP0276032A1 Instant smelting process for sulfidic ores |
| 07/26/1988 | CA1239540A1 Method for controlling slag chemistry in a refining vessel |
| 07/19/1988 | US4758266 Production of high surface area nickel powder |
| 07/12/1988 | US4756748 Processes for the smelting reduction of smeltable materials |
| 06/14/1988 | USRE32694 Separation of cobalt and nickel by solvent extraction |
| 05/11/1988 | EP0266975A1 Smelting reduction |
| 04/26/1988 | US4740239 Controlled reduction in rotary kiln |
| 04/12/1988 | US4737187 Method of treating nickel-containing and vanadium-containing residues |
| 04/12/1988 | US4737186 Using carbon dust |
| 04/06/1988 | EP0262964A2 Recovery of nickel or cobalt from solvent extraction strip solutions |
| 01/28/1988 | EP0236480A4 Production of hydrogen by deserpentinization of ultramafic rock. |
| 01/26/1988 | US4721606 Recovery of metal values from spent catalysts |
| 01/26/1988 | US4721605 Selective removal of metals from aqueous solutions with dithiophosphinic acids |
| 01/19/1988 | CA1231534A1 Treatment for spent petroleum cracking catalyst |
| 12/15/1987 | US4713110 Reducing salts with magnesium and catalyst |
| 12/09/1987 | EP0248518A1 Separation of nickel from copper in autoclave |
| 11/10/1987 | US4705559 Agglomeration |
| 10/27/1987 | CA1228483A1 Process for the pressure oxidation acid leaching of non-ferrous metal and iron-containing sulphidic material |
| 10/20/1987 | US4701217 Smelting reduction |
| 09/30/1987 | EP0239227A1 Fluidised bed process for the recovery of finely divided metals |
| 09/29/1987 | CA1227336A1 Metal recovery process |
| 09/16/1987 | EP0236542A2 Novel organic phosphinic acid compounds |
| 09/16/1987 | EP0236480A1 Production of hydrogen by deserpentinization of ultramafic rock. |
| 09/01/1987 | US4690710 Process for producing cobalt metal powder |
| 08/27/1987 | WO1987005052A1 Fluidised bed process for the recovery of finely divided metals |
| 08/11/1987 | CA1225243A1 Winning metal from ore |
| 08/04/1987 | US4684401 From chlorides; two-step reduction |
| 08/04/1987 | CA1224920A1 Rotary kiln for use in reduction-smelting ores of oxides of iron group elements and smelting method thereof |
| 07/14/1987 | US4680168 Extraction of Group 8 metals from organic solutions |
| 07/14/1987 | CA1224048A1 Process of continuously treating an alloy melt |
| 06/10/1987 | CN86106147A Production of elements and compounds by deserpentinization of ultramafic rock |
| 06/09/1987 | US4671821 Extracting cobalt from aqueous solutions containing nickel with mono-ester of benzylphosphonic acid |
| 06/03/1987 | EP0224239A2 Process for preparing finely divided metal powders |
| 05/26/1987 | US4668483 Process for recovery of chromium |
| 05/20/1987 | EP0222452A1 Process for reducing the oxidation level of metallic oxides |
| 05/06/1987 | EP0220198A1 Preparing metal compounds by pyrolysis. |
| 05/05/1987 | US4662936 Method of treating nickel-containing and vanadium-containing residues |
| 05/05/1987 | CA1221244A1 Recovering metals from spent hydroprocessing catalysts |
| 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 | US4657585 Method for separating cobalt, nickel and the like from alloys |