| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 04/22/1998 | EP0836523A1 Process for making shaped copper articles |
| 04/22/1998 | CN1179472A Method for treating high-germanium alum precipitation liquid |
| 04/21/1998 | CA2098638C Method for preventing the formation of jarosite and ammonium and alkali based double salts in solvent extraction circuits connected to acidic leaching processes |
| 04/16/1998 | WO1998015666A1 Production process to obtain precious metals especially zinc from raw materials containing chlorine or fluorine |
| 04/14/1998 | US5739396 Chiral compound comprising chiral backbone to which is bound two or three metal binding moieties |
| 04/14/1998 | US5738791 Contacting with hydrophobic, isotropic, microporous polymer having compatible hydrophobic organic complexing liquid immobilized in solidified polymer mass |
| 04/14/1998 | CA2038708C Removal of base metals and cyanide from gold-barren cip solutions |
| 04/09/1998 | WO1998014623A1 Hydrometallurgical extraction of copper, zinc and cobalt from ores containing manganese dioxide |
| 04/09/1998 | WO1998014621A1 Use of hydrocarbon-soluble aminomethylenephosphonic acid derivatives for the solvent extraction of metal ions from aqueous solutions |
| 04/09/1998 | CA2261626A1 Use of hydrocarbon-soluble aminomethylenephosphonic acid derivatives for the solvent extraction of metal ions from aqueous solutions |
| 04/08/1998 | EP0834584A1 Recovery of tantalum and/or niobium from metalfluoride containing materials and ore residues with use of sulfuric acid roasting |
| 04/08/1998 | EP0834583A1 Wet process for the entraction of zinc and other metal values form chlorine and fluorine bearing raw materials such as Waelz oxides |
| 04/08/1998 | EP0834581A1 Use of hydrocarbon-soluble aminomethylenephosphonic acid derivatives for the solvent extraction of metal ions from aqueous solutions |
| 04/08/1998 | EP0833961A1 Ammoniacal metal solution recycling process |
| 04/08/1998 | CN1178261A Method for recovering etchant from etching waste liquid containing iron chloride |
| 04/08/1998 | CN1178251A Electrolytic separating process for ilmenite |
| 04/07/1998 | US5736053 Contacting liquid hydrocarbon with activated carbon which has been activated with gas comprising specified amount of water vapor |
| 04/02/1998 | DE19632543C1 Verfahren zur Herstellung von LiPF¶6¶ A process for preparing LiPF¶6¶ |
| 04/01/1998 | EP0832306A2 Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulphide ores |
| 04/01/1998 | EP0832303A1 Chloride assisted hydrometallurgical extraction of metal |
| 04/01/1998 | EP0832302A1 Chloride assisted hydrometallurgical extraction of metal |
| 04/01/1998 | EP0815270A4 Atmospheric mineral leaching process |
| 04/01/1998 | CN1177645A Process for direct extraction of sulfide mineral by combound catalytic oxidation |
| 03/31/1998 | US5733431 Method for removing copper ions from copper ore using organic extractions |
| 03/31/1998 | CA2135360C Method of leaching mineral values from oil sand tailings |
| 03/26/1998 | CA2212714A1 Process for recovering tantalum and/or niobium compounds from compositescontaining a variety of metal compounds |
| 03/25/1998 | CN2276941Y high efficiency gold impregnating and ore dressing vehicle |
| 03/25/1998 | CN1177014A Method for obtg. gold, silver and other noble metals from anode and contg. high concn. arsenic and lead |
| 03/25/1998 | CN1177012A Process for separation molybdenum and nickel from black shale by sodium carbonate conversion treatment |
| 03/25/1998 | CN1177011A Vertical solid-liquid counter-current extraction column |
| 03/25/1998 | CN1037835C Method for separating boric acid from magnesium sulfate mixed solution |
| 03/24/1998 | US5730874 Extraction of metals using supercritical fluid and chelate forming legand |
| 03/19/1998 | WO1998011019A1 Method for pressure oxidizing gold-bearing refractory sulfide ores having organic carbon |
| 03/18/1998 | EP0829549A1 Process for the removal of heavy metal impurities from a concentrated alkali chloride solution down to a rest value of 0,01 ppm |
| 03/18/1998 | EP0828689A1 Metal and fluorine values recovery from fluoride salt matrices |
| 03/18/1998 | EP0828552A1 Process for recovery of metal ions |
| 03/18/1998 | CN1037786C Polyhydroxy aromatic acids reduction leaching method of manganese oxide ore |
| 03/18/1998 | CN1037785C Arylamine reduction leaching method of ocean manganese nodules |
| 03/18/1998 | CN1037784C Ascorbic acid reduction leaching method of manganese oxide ore |
| 03/17/1998 | US5728854 Method for separating iron from nickel and/or cadmium from a waste containing the same |
| 03/17/1998 | US5728853 Chemical process |
| 03/11/1998 | CN1175982A Modifiers for aldoxime extractant of metal values |
| 03/05/1998 | WO1998008991A1 Method for phytomining of nickel, cobalt and other metals from soil |
| 03/05/1998 | WO1998008585A1 Leaching of metal chalcogenide (sulfide-type) minerals with oxidizing and chelating agents |
| 03/04/1998 | EP0826784A2 Carbon support impregnated with anthrahydroquinone and metal for treating noble metal complex ions in aqueous solution |
| 03/04/1998 | EP0734355B1 Recovery of spent catalyst |
| 02/26/1998 | WO1998007900A1 Method for removing copper ions from copper ore using organic extractants |
| 02/26/1998 | WO1998007892A1 Method and apparatus for biocatalyzed anaerobic oxidation of metal sulfides |
| 02/26/1998 | CA2257126A1 Method and apparatus for biocatalyzed anaerobic oxidation of metal sulfides |
| 02/25/1998 | CN1174576A Chloride assisted hydrometallurgical copper extraction |
| 02/24/1998 | CA2161308C Selective bismuth and antimony removal from copper electrolyte |
| 02/19/1998 | WO1998006879A1 Method for leaching zinc concentrate in atmospheric conditions |
| 02/19/1998 | WO1998006756A1 Biodegradable complexing agents for heavy metals |
| 02/19/1998 | WO1998006666A1 LiPF6 PRODUCTION PROCESS |
| 02/19/1998 | CA2259985A1 Lipf6 production process |
| 02/17/1998 | US5718874 Solvent extraction method of separating ferric chloride from nickel chloride |
| 02/10/1998 | CA2031165C Recovery of cobalt catalyst values |
| 02/05/1998 | WO1998004754A1 Method and apparatus for back-extracting metal chelates |
| 02/05/1998 | WO1998004753A1 Fluid extraction of metals or metalloids |
| 02/05/1998 | WO1998004752A1 Hydrometallurgical zinc recovery process and apparatus |
| 02/05/1998 | CA2261967A1 Fluid extraction of metals or metalloids |
| 02/05/1998 | CA2260831A1 Method and apparatus for back-extracting metal chelates |
| 02/04/1998 | CN1172167A Smelting-rust corrosion-extraction process for extracting valuable metals from oceanic multi-metal aggregate |
| 01/28/1998 | CN1171450A Regeneration of dithiophosphorus acid metal extractants |
| 01/28/1998 | CN1171449A Wet process for extracting silver from high-manganese S-Fe-Ag ore |
| 01/27/1998 | US5711922 Preferential hydrometallurgical conversion of zinc sulfide to sulfate from zinc sulfide containing ores and concentrates |
| 01/27/1998 | US5711784 Method for phytomining of nickel, cobalt and other metals from soil |
| 01/27/1998 | CA2151289C Treatment of lead sulphide bearing minerals |
| 01/27/1998 | CA2050625C Process of stripping gold and silver from carbon |
| 01/22/1998 | WO1998002594A1 Selective separation of dissolved metal species with substituted 1,3,5 triazine extractants |
| 01/22/1998 | DE19628816A1 Ammonium para-tungstate production in good yield without neutralising excess soda and acidification |
| 01/21/1998 | CN1171171A Process for recovery of metals from used nickel-metal hydride accumulators |
| 01/21/1998 | CN1171170A Process for recovery of metals from used nickel-metal hydride accumulators |
| 01/20/1998 | US5709731 Slurry pipeline leaching method |
| 01/20/1998 | US5709730 Calcium chloride, hydrochloric acid mixture with flue dust, oxidation of metals, mixing with hematite, complexing, filtration and recovering metal oxides such as zinc oxides, circulation and demetallization |
| 01/15/1998 | WO1998001393A1 Process for preparing pure alkali and/or ammonium tungstate solutions |
| 01/15/1998 | CA2259461A1 Process for preparing pure alkali and/or ammonium tungstate solutions |
| 01/14/1998 | CN1170045A Method and production line system for extracting copper oxide |
| 01/14/1998 | CN1170044A Method for recovering zinc from dregs containing zinc ferrite |
| 01/14/1998 | CN1170043A Method and apparatus for activating and dissolving sulfide ores containing gold |
| 01/13/1998 | US5708958 Method of separating trivalent actinides and rare earth elements |
| 01/08/1998 | DE19724183A1 Production of pure alkali metal or ammonium tungstate solutions |
| 01/08/1998 | DE19626387A1 Metal extraction process from ores, especially for precious metals |
| 01/07/1998 | EP0815270A1 Atmospheric mineral leaching process |
| 01/07/1998 | EP0787044A4 Polymerized phospholipid membrane mediated synthesis of metal nanoparticles |
| 01/07/1998 | EP0782577A4 Asymmetric ligands useful for transition metal catalyzed bond forming reactions and epoxide reactions therewith |
| 12/31/1997 | WO1997050092A1 Method for cesium removal from radioactive waste liquids and method for producing hexacyanoferrates |
| 12/31/1997 | WO1997049836A1 Apparatus and method for copper extraction by in-situ electrolysis in heap-leaching of ores |
| 12/31/1997 | WO1997049835A1 Process and apparatus for production of useful iron product from industrial waste streams |
| 12/31/1997 | WO1997049637A1 Beneficiation of furnace dust for the recovery of chemical and metal values |
| 12/31/1997 | WO1997049474A1 Process for the recovery of precious metal values from aqueous ammoniacal thiosulfate leach solutions |
| 12/31/1997 | CA2259423A1 Beneficiation of furnace dust for the recovery of chemical and metal values |
| 12/31/1997 | CA2259325A1 Process and apparatus for production of useful iron product from industrial waste streams |
| 12/31/1997 | CA2256764A1 Process for the recovery of precious metal values from aqueous ammoniacal thiosulfate leach solutions |
| 12/30/1997 | CA2051698C Recovery of gold and silver from complex refractory sulphide ores by cyanidisation and oxidation with peroxides |
| 12/29/1997 | EP0813614A1 Method for recovering heavy metals from acid and ammonia solutions |
| 12/29/1997 | EP0813500A1 Purification of metal containing solutions |
| 12/25/1997 | CA2208665A1 Method and system for extracting and refining gold from ores |
| 12/24/1997 | WO1997035945A3 Process for removal of organo-sulfur compounds from liquid hydrocarbons |
| 12/17/1997 | CN1167831A Simple method and apparatus for obtaining Cu, Ni and Co from ore by wet metallurgy |