| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 03/20/1985 | EP0134435A2 A process for the recovery of valuable metals from the ashes of normal and complex pyrites |
| 03/12/1985 | CA1183690A1 Chloride leaching of nickel-cobalt-iron sulphides |
| 03/12/1985 | CA1183689A1 Method for separating and recovering nickel and copper from complex materials |
| 03/05/1985 | US4503017 Precipitation of sulfides |
| 03/05/1985 | US4503016 Process for extracting heavy metal ions from aqueous solutions |
| 03/05/1985 | US4503015 Method of removing arsenic from a copper electrolyte |
| 03/05/1985 | CA1183329A1 Process for reclaimation of high purity selenium, tellurium, and arsenic from scrap alloys |
| 02/26/1985 | US4501721 Removing metal from particlized metal ores |
| 02/26/1985 | CA1183004A1 Solvent extraction of tungsten from aqueous tungstate solutions |
| 02/19/1985 | US4500499 Production of high purity stable ferrate salts |
| 02/19/1985 | US4500498 Forming zinc ammine chloride, separation, and heating to recover zinc chloride |
| 02/19/1985 | US4500496 Adding ferrous chloride and chlorinating |
| 02/19/1985 | US4500495 Roasting, contacting with aqueous ammonia and sulfur dioxide, precipitation with hydrogen sulfide |
| 02/19/1985 | US4500494 Microencapsulated chelating agents and their use in removing metal ions from aqueous solutions |
| 02/19/1985 | US4500396 Copper recovery process |
| 02/19/1985 | CA1182646A1 Precious metal recovery cartridge and method |
| 02/13/1985 | EP0133104A1 Process for retaining a substance dissolved in a solution |
| 02/13/1985 | EP0132906A2 Extracting chromium (III) from aqueous solutions with 2-ethylhexyl acid phosphate |
| 02/12/1985 | US4499058 Solvent extraction using organic phorphous compound |
| 02/12/1985 | US4499057 Using 2,3-dioxycarbonylpropyl carbonates; hydrometallurgy |
| 02/12/1985 | CA1182277A1 Purification of ammonium tungstate solutions |
| 02/05/1985 | US4497778 Preroasting to convert pyrite to pyrrhotite |
| 01/31/1985 | WO1985000385A1 Metal sulphide extraction |
| 01/31/1985 | WO1985000384A1 Improvements in or relating to the dissolution of noble metals |
| 01/29/1985 | US4496523 Solvent extraction by forming complex of acid, nitrogen compound, and metal |
| 01/23/1985 | EP0132014A2 Process for removing fluorine from an acid sulfate solution |
| 01/22/1985 | US4495157 Recovery of metal values from spent hydrodesulfurization catalysts |
| 01/22/1985 | CA1181239A1 Simultaneous oxidation and extraction of vanadium from wet-process phosphoric acid |
| 01/08/1985 | US4492680 Removal of cadmium from acidic phosphatic solutions |
| 01/02/1985 | EP0129564A1 Bacterial beneficiation of minerals |
| 01/02/1985 | CA1180315A Stripping gold or silver from particulate materials |
| 01/02/1985 | CA1180195A Method and apparatus for removing metals from metal- salt solutions |
| 01/02/1985 | CA1180193A Hydrometallurgical process for extracting and recovering metal values from complex ores containing arsenic and sulphur |
| 12/27/1984 | EP0129448A1 Process for selectively extracting copper using 4-acyl(3H)-pyrazol-3-ones |
| 12/25/1984 | US4490338 Process for separating trivalent iron from an aqueous chloride solution |
| 12/25/1984 | US4490297 Solubilizing salt by joint action of hydrogen bromide, acetic anhydride and acetyl bromide |
| 12/19/1984 | EP0128439A2 Process for the recovery of noble metals of group VIII of the periodic table of the elements from a contaminated solution resulting from the carbonylation of methyl acetate and/or dimethyl ether |
| 12/18/1984 | US4489042 Uranium ore, solubilizing pyrites |
| 12/18/1984 | CA1179510A1 A process and an apparatus for pressure leaching a mineral material in the form of a metal ore |
| 12/18/1984 | CA1179508A1 Process for recovering magnesium and/or nickel by means of liquid-liquid extraction |
| 12/12/1984 | EP0128057A1 Process for purifying a mixture by forming two phases of distinct physical states and preferentially extracting the impurities |
| 12/12/1984 | EP0127999A1 Liquid phase oxidation |
| 12/12/1984 | EP0127906A1 Process for removing heavy metallic elements suspended in a liquid |
| 12/11/1984 | CA1179151A2 Extraction process for the selective romoval of cobalt (ii) from aqueous solutions |
| 12/11/1984 | CA1179147A1 Process for the extraction of arsenic from solutions containing carbonates, sulfates, possibly an alcaline hydroxide and at least one of the metals vanadium, uranium and molybdenum |
| 12/06/1984 | WO1984004759A1 Extraction of metals from ores |
| 12/04/1984 | US4486481 Trace material recovery from large water masses |
| 12/04/1984 | US4486391 Separation and recovery of ionic substances by fluorine-containing compound |
| 11/27/1984 | US4485076 Liquid/liquid extraction of gallium values from basic aqueous solutions thereof |
| 11/27/1984 | US4485075 Addition of lime |
| 11/27/1984 | US4485074 Process for the recovery of molybdenum from organic solutions |
| 11/27/1984 | US4485047 Copper and manganese oxidation catalysts recovery from aqueous solutions |
| 11/21/1984 | EP0125276A1 New chelate forming bisquinoline compounds and processes for recovering metals |
| 11/20/1984 | US4483845 Reduction of arsenic compound, then solvent extraction |
| 11/20/1984 | US4483827 Hydrometallurgical process for the recovery of valuable metals from sulfidic, silicate-containing raw materials |
| 11/20/1984 | CA1178063A1 Process for the extraction of precious metals for concentrates thereof |
| 11/20/1984 | CA1178062A1 Recovery of vanadium |
| 11/20/1984 | CA1178027A1 Process for selenium purification |
| 11/14/1984 | EP0124577A1 New chelate forming quinoline compounds and processes for recovering metals |
| 11/08/1984 | WO1984004333A1 High temperature pre-treatment by means of an aqueous alcolyne solution of clayish gangue ore containing at least one valuable element |
| 11/06/1984 | CA1177256A1 Extraction process for the selective removal of cobalt (ii) from aqueous solutions |
| 11/06/1984 | CA1177255A1 Extraction process for the selective removal of cobalt (ii) from aqueous solutions |
| 11/06/1984 | CA1177254A1 Process for the extraction of precious metals for concentrates thereof |
| 11/06/1984 | CA1177253A1 Elutriation desliming of silicious iron ore |
| 10/30/1984 | US4479922 Solvent treatment in the separation of palladium and/or gold from other platinum group and base metals |
| 10/23/1984 | US4478698 Roasting; solvent extraction; precipitation |
| 10/23/1984 | CA1176472A1 Method of leaching of metal sulphide-containing material |
| 10/16/1984 | CA1176030A1 Process for recovery of aluminum oxide from aluminum compounds containing fluorine |
| 10/09/1984 | US4475772 Leaching with ion exchange resins |
| 10/09/1984 | CA1175664A1 Process for the treatment of a raw material which contains oxide and ferrite of zinc, copper and cadmium |
| 09/18/1984 | US4472359 Method of pressure leaching |
| 09/18/1984 | CA1174475A1 Hydrometallurgical process for the treatment of a raw material which contains oxide and ferrite of zinc, copper and codmium |
| 09/18/1984 | CA1174474A1 Process for separating metals from aqueous solutions |
| 09/04/1984 | CA1173995A1 Phenolic chelate resin, process for producing the same, and method of recovering heavy metal ions with the same |
| 08/30/1984 | WO1984003305A1 Extractant for use in extractive separation of nickel and cobalt and process of using same |
| 08/29/1984 | EP0116989A1 Process for removing heavy metals from aqueous media |
| 08/29/1984 | EP0116988A1 Process for removing heavy metals from aqueous media |
| 08/28/1984 | US4468461 Microbiological removal of chromate from contaminated waste water |
| 08/28/1984 | US4468373 Process for solvent extraction of vanadate and molybdate anions |
| 08/28/1984 | US4468303 Metal recovery |
| 08/28/1984 | CA1173255A1 Process for reducing the iron content of iron-, silicon- and aluminum-containing raw materials and for producing ferric oxids, optionally along with an alumina concentrate |
| 08/22/1984 | EP0116483A1 Process for recovering uranium, yttrium, thorium and rare earth metals from an organic phase |
| 08/21/1984 | US4466948 Process for removing heavy metal ions and arsenic from wet-processed phosphoric acid |
| 08/21/1984 | US4466828 Process for smelting nickel |
| 08/14/1984 | US4465569 Method of producing zinc from chloride solutions which contain chiefly iron, copper and zinc |
| 08/14/1984 | CA1172426A1 Process for the purification of a gallium solution using liquid-liquid extraction with alcohols |
| 08/07/1984 | US4464348 Selective extraction of cobalt from ores |
| 08/07/1984 | US4464346 Extraction of uranium with triphosphonic esters |
| 08/01/1984 | EP0114747A2 Winning metal from ore |
| 07/25/1984 | EP0113912A2 Selective extraction of rhenium from aqueous sulfuric acid solutions |
| 07/24/1984 | US4461748 Using organophosphorus compounds |
| 07/24/1984 | US4461747 Method for separating actinides from lanthanides in an acidic aqueous solution |
| 07/24/1984 | CA1171287A1 Acid leaching of lateritic nickel ores |
| 07/24/1984 | CA1171286A1 Recovery of silver and gold from ores and concentrates |
| 07/18/1984 | EP0113649A1 A method for working-up complex sulphidic ore concentrates |
| 07/18/1984 | EP0113454A2 Extraction of silver and palladium metals from aqueous solutions using tertiary phosphine sulfides |
| 07/17/1984 | US4460548 Extraction of uranium with diphosphonic compounds |
| 07/17/1984 | CA1170839A1 Extraction process for the separation of a highly nickel-free cobalt product from aqueous solutions of cobalt and nickel |
| 07/11/1984 | EP0113281A1 Process for reducing metallic compounds using polyols, and metallic powders produced thereby |
| 07/10/1984 | USRE31629 Extraction process for purification of phosphoric acid |