| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 04/06/1999 | CA2113039C Process for biolixiviating copper sulfides by indirect contact with separation of effects |
| 04/01/1999 | WO1999015707A1 Detection and extraction of an ion in a solution, particularly uranium ion |
| 03/31/1999 | EP0905264A1 Recovery of precious metal |
| 03/31/1999 | CN1212732A Process for recovery of zinc from sphalerite containing ores or concentrates |
| 03/31/1999 | CN1212292A Method for separating micrometallic element from pregnant solution by load fibre column |
| 03/30/1999 | US5888462 Method of solvent extraction of nickel sulfate solutions |
| 03/30/1999 | US5888398 Composition and process for separating cesium ions from an acidic aqueous solution also containing other ions |
| 03/25/1999 | WO1999014386A1 Method for separating trivalent actinides from at least one trivalent lanthanide by means of (bis)aryldithiophosphonic acid as organophosphate as synergist |
| 03/25/1999 | WO1999014385A1 Separation of platinum group metals |
| 03/25/1999 | DE19746134C1 Sequential recovery of platinum group metals from solution |
| 03/24/1999 | EP0804624B1 Chloride assisted hydrometallurgical copper extraction |
| 03/24/1999 | CN1211627A Fermentation type preoxidation technique for difficult-treating gold mine |
| 03/23/1999 | US5885536 Process for alkaline leaching a titaniferous material |
| 03/23/1999 | US5885535 Process for extracting and recovering silver |
| 03/23/1999 | US5885324 Method for the production of synthetic rutile |
| 03/18/1999 | WO1999013116A1 Process for recovery of gold and/or silver |
| 03/18/1999 | WO1999013115A1 Method for reprocessing materials containing precious metals by means of chromatographic separation and fractionation |
| 03/18/1999 | WO1999012878A1 Solvent and process for extracting cesium from alkaline waste solutions |
| 03/18/1999 | WO1998058090A3 A method and a device for recovering metals comprising dissolving, concentrating and electrowinning means with rotatable cathode |
| 03/18/1999 | DE19834152A1 Separating trivalent actinide elements from lanthanides |
| 03/18/1999 | CA2342899A1 Process for recovery of gold and/or silver |
| 03/18/1999 | CA2303046A1 Method for reprocessing materials containing precious metals by means of chromatographic separation and fractionation |
| 03/17/1999 | CN1210895A Solvent extraction process for improving purity of strontium and barium salts |
| 03/17/1999 | CN1210894A Producing pure tungsten compound using tungsten-containing material |
| 03/17/1999 | CN1210893A Process for extracting manganese ore with sulfuric acid at ordinary temperature |
| 03/17/1999 | CN1042554C Method for removing copper from nickel anolyte by solvent extraction |
| 03/16/1999 | US5882502 Electrochemical apparatus and system for extracting and recovering metals from their compounds |
| 03/16/1999 | CA2137124C Pressure leaching of nickel and cobalt sulphides with chlorine under controlled redox potential conditions |
| 03/16/1999 | CA2055207C Processing of carbon steel furnace dusts |
| 03/15/1999 | CA2215465A1 An improved gold retrieving pan |
| 03/11/1999 | WO1999011831A1 Carbon catalyzed leaching of metal-containing ores in ferric sulphate or sulphuric acid solution |
| 03/11/1999 | WO1999011830A1 Method and apparatus for controllably conducting a solution obtained from liquid-liquid extraction of two solutions and mixed into dispersion, to a wide settler |
| 03/10/1999 | EP0900249A1 Integral multi-layered ion-exchange composite membranes |
| 03/10/1999 | EP0682806B1 Process for the treatment of particulate material |
| 03/10/1999 | CN1210563A Improved beta-diketones for extraction of copper from aqueous ammoniacal solutions |
| 03/10/1999 | CN1210152A Copper recovery |
| 03/10/1999 | CN1042445C Prepn. of pure tungstate by extracting tungsten from alkali leaching liquor of tungsten ore |
| 03/09/1999 | US5881359 Metal and fluorine values recovery from fluoride salt matrices |
| 03/09/1999 | US5881358 Contacting the transition metal with a cyclic phenol sulfide and an extraction accelerator to extract transition metal from the material |
| 03/09/1999 | US5879644 Interseparation of platinum group metals |
| 03/09/1999 | CA2145054C A process for the extraction and separation of nickel and/or cobalt |
| 03/04/1999 | WO1999010546A1 Process for the extraction of metals from ammoniacal solution |
| 03/04/1999 | WO1999010545A1 Method for separating actinides and lanthanides by liquid-liquid extraction using calixarenes |
| 03/04/1999 | CA2302353A1 Process for the extraction of metals from ammoniacal solution |
| 03/03/1999 | CN1042349C Method for upgrading titanium-contained materials |
| 03/02/1999 | USRE36118 Chemical process of separating metals from an organic complex |
| 03/02/1999 | US5876588 Process for removing and recovering copper, silver and zinc from sulfide ores |
| 03/02/1999 | CA2101495C Recovery of precious metal values from refractory ores |
| 02/25/1999 | WO1999009226A1 Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulphide or laterite ores |
| 02/25/1999 | WO1999009225A1 Chloride assisted hydrometallurgical extraction of copper from sulphide ore materials |
| 02/25/1999 | WO1999009223A1 Method for dissociating metals or dissociating metal compounds |
| 02/25/1999 | DE19737452A1 Microbiological recovery of dissolved copper@ as pure metal |
| 02/25/1999 | CA2297678A1 Method for dissociating metals or dissociating metal compounds |
| 02/24/1999 | CN1208773A Extraction of metal silver by modified active carbon fiber reduction adsorption |
| 02/23/1999 | US5874055 Oxidizing ore under pressure in presence of acidic solution containing halide and sulfate ions to produce slurry,filtering, solvent extracting filtrate to produce copper concentrate, recycling depleted raffinate |
| 02/23/1999 | US5873927 Integrated, tank/heap biooxidation process |
| 02/23/1999 | CA2173271C Purification of elemental sulphur |
| 02/17/1999 | CN2307796Y Desorption column integrating heating with desorption |
| 02/17/1999 | CN1208080A In-situ ionic rare earth deposit impregnating technology |
| 02/17/1999 | CN1042147C Method for selectively extraction separating Ge |
| 02/17/1999 | CN1042146C Preparation method for crystal rare earth carbonate |
| 02/17/1999 | CN1042145C Method of recovering cerium from solid mixture containing cerium oxide and fluoride |
| 02/16/1999 | US5872279 Bis(1,1,3,3-tetramethylbutyl) phosphinic acid compound, a production method thereof and an extracting agent |
| 02/16/1999 | US5872074 Forming composites or alloys and leaching nanocrystalline material having a specific surface area |
| 02/11/1999 | WO1999006603A1 Selective precipitation of nickel and cobalt |
| 02/10/1999 | CN1207777A Process for extracting metals directly from metal oxides |
| 02/09/1999 | US5869012 Chloride assisted hydrometallurgical extraction of metal |
| 02/09/1999 | US5868995 Dynamic mining system comprising hydrated multiple recovery sites and related methods |
| 02/09/1999 | CA1340385C Recovery of precious metals |
| 02/03/1999 | CN1206747A Process of chlorine complexing oxidation method for slective leaching nickel cobalt copper sulfurized ore |
| 02/03/1999 | CN1041946C Wet type copper smelting-extracting process for cupric sulfide ore |
| 01/28/1999 | DE19731349A1 Dissolving metal oxide, metal hydroxide or metal which is not easily soluble |
| 01/27/1999 | EP0871800A4 Method for recovering copper |
| 01/27/1999 | CN1206048A Cyclic carbamates noble metal extractant |
| 01/27/1999 | CN1041845C Method for treatment of residues from organochlorosilane and/or chlorosilane synthesis |
| 01/26/1999 | US5863491 Outer housing enclosing a light-irradiated, reactor having transparent walls and containing porous strata of photocatalyst implanted with metal nucleation seeds of same metal to be recovered |
| 01/20/1999 | EP0891298A1 Method for recovering sodium from alkaline industrial waste |
| 01/20/1999 | CN1205363A Method of preparing cerium by separating and removing fluorine from bastnaesite raw material |
| 01/20/1999 | CN1041694C Method for expected ions thickened and separated from multi-ion source solution and used solid compound |
| 01/19/1999 | US5861091 Process for electrochemically dissolving a metal such as zinc or tin |
| 01/19/1999 | CA2063031C Process for upgrading copper sulphide residues containing nickel and arsenic |
| 01/13/1999 | EP0789784B1 Process for decomposing and recovering the metal components from superalloys |
| 01/13/1999 | EP0776378B1 Hydrometallurgical conversion of zinc sulfide to sulfate from zinc sulfide containing ores and concentrates |
| 01/13/1999 | CN1204691A Microbe and its application |
| 01/12/1999 | US5858315 Process for the extraction of zinc from sulphide concentrates |
| 01/12/1999 | US5858061 Process for the recovery of metals from used nickel/metal hydride storage batteries |
| 01/07/1999 | EP0889009A1 Process for removing heavy metal ions |
| 01/07/1999 | EP0806059B1 Process for recovery of metals from used nickel-metal hydride accumulators |
| 01/06/1999 | CN1203955A Pressure oxidation pretreatment process of insoluble gold ore |
| 01/05/1999 | US5855858 Process for the recovery of nickel and/or cobalt from an ore or concentrate |
| 01/05/1999 | US5855645 Production of more concentrated iron product from industrial waste materials streams |
| 12/30/1998 | WO1998059093A1 Copper solvent extraction and electrowinning process |
| 12/30/1998 | WO1998059081A1 Separating metal ions absorbed on a resin and installation for recycling photographic effluents including an exchanger and an electrolysis vessel |
| 12/30/1998 | WO1998059080A1 Method for phytomining of nickel, cobalt and other metals from soil |
| 12/30/1998 | EP0795046A4 Process for making copper metal powder, copper oxides and copper foil |
| 12/30/1998 | EP0792247A4 Metal and fluorine values recovery from mineral ore treatment |
| 12/30/1998 | CN1203279A Process for removing Mo, As, Sb and Sn by precipitating of tungstate solution |
| 12/23/1998 | WO1998058092A1 Method and installation for recovering precious metals from solutions using laser-induced reduction and precipitation |
| 12/23/1998 | WO1998058090A2 A method and a device for recovering metals comprising dissolving, concentrating and electrowinning means with rotatable cathode |
| 12/23/1998 | WO1998058089A1 Method for smelting noble metal |