| Patents for C22B 11 - Obtaining noble metals (5,080) |
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| 04/01/1999 | WO1999015276A1 Modular transportable processing plant and mineral process evaluation unit |
| 03/31/1999 | EP0905264A1 Recovery of precious metal |
| 03/30/1999 | US5887805 Compositions of metallic and non-metallic components of wiring assemblies and printed wiring boards |
| 03/30/1999 | CA2123766C Extraction of mercury and gold from mine tailings |
| 03/25/1999 | WO1999014385A1 Separation of platinum group metals |
| 03/24/1999 | CN1042654C Adsorptive palladium-alloy net |
| 03/23/1999 | US5885327 Rapid elution of adsorbed aurocyanide from guanidine-functional ion exchange resin with caustic solution containing elution enhancing amount of alkali metal cyanide salt |
| 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 | 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 |
| 03/15/1999 | CA2215465A1 An improved gold retrieving pan |
| 03/09/1999 | US5879644 Interseparation of platinum group metals |
| 03/04/1999 | WO1999010625A1 Placer gold mining method, placer gold mining boat used in this method, placer gold digging and separating method and system therefor, and placer gold separating method and system therefor |
| 03/04/1999 | CA2269928A1 Placer gold mining method, placer gold mining boat used in this method, placer gold digging and separating method and system therefor, and placer gold separating method and systemtherefor |
| 03/02/1999 | CA2101495C Recovery of precious metal values from refractory ores |
| 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 |
| 02/09/1999 | 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 |
| 02/04/1999 | DE19733434A1 Preparation of filter dust material |
| 01/05/1999 | US5855858 Process for the recovery of nickel and/or cobalt from an ore or concentrate |
| 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 | CN1203280A Wet-metallurgical non-cyanogen process and its special equipment |
| 12/23/1998 | WO1998058092A1 Method and installation for recovering precious metals from solutions using laser-induced reduction and precipitation |
| 12/23/1998 | WO1998058089A1 Method for smelting noble metal |
| 12/23/1998 | EP0885170A1 Method of biotreatment for solid materials in a nonstirred surface bioreactor |
| 12/23/1998 | CN1202391A Quick dissolving method for pure platinum or platinum alloy and use |
| 12/17/1998 | WO1998056494A1 Method for separating and isolating precious metals from non precious metals dissolved in solutions |
| 12/15/1998 | CA2096665C Pyrometallurgical method for recovering volatile metals from sulfidic raw materials |
| 12/15/1998 | CA1340238C Adsorption recovery of metal values from a pulp or leach solution |
| 12/10/1998 | DE19723160A1 Recovery of valuable metals from catalysts having carrier bodies |
| 12/08/1998 | CA2036058C Hydrometallurgic method for processing raw materials containing zinc sulphide |
| 12/08/1998 | CA1340169C Hydrometallurgical process for extracting gold and silver ores with bromate/perbromide solutions and compositions therefor |
| 12/02/1998 | EP0880726A1 Regeneration of spent fixer solution |
| 12/02/1998 | CN1040999C Process for elution of precious metals adsorbed on active carbon |
| 11/25/1998 | CN1199780A Ag and Au extracting and Sb, Bi, Cu and Pb recovering process from lead slime |
| 11/19/1998 | WO1998051827A1 Integrated, tank/heap biooxidation process for the lixiviation of sulfide ores |
| 11/17/1998 | US5837210 Method for processing gold-bearing sulfide ores involving preparation of a sulfide concentrate |
| 11/12/1998 | WO1998050592A1 In-situ chemical reactor for recovery of metals or purification of salts |
| 11/12/1998 | CA2289126A1 In-situ chemical reactor for recovery of metals or purification of salts |
| 11/11/1998 | CN1040665C Method for recovering palladium from waste palladium carbon catalyst |
| 11/11/1998 | CN1040663C Recovery of palladium catalyst |
| 11/03/1998 | US5829694 Apparatus and systems that separate and isolate precious and semi-precious metals from electronic circuit boards |
| 10/28/1998 | CN1197485A Method of purifying gold |
| 10/27/1998 | US5827701 Method for the generation and use of ferric ions |
| 10/27/1998 | US5827348 Treating with solution of cyanide ion and fluoroaliphatic surfactant |
| 10/21/1998 | EP0871787A1 Electrochemical processing method for catalyst substrates containing noble metals for the recovery thereof |
| 10/15/1998 | WO1998045488A1 Extraction by sorption of platine group metals from part and instrumentation surfaces |
| 10/14/1998 | CN1196095A Method for recovery of gold using extraction having guanidyl functionality |
| 10/08/1998 | DE19713898A1 Metal extraction, e.g. silver@, gold@ and platinum@ |
| 10/04/1998 | CA2201797A1 Gold extraction apparatus |
| 10/01/1998 | WO1998042894A1 Electrolytic method for recovering and recycling silver from a nitric solution |
| 09/30/1998 | CN2292807Y Particle impregnation primary gold ore separating and extracting apparatus |
| 09/30/1998 | CN1040029C Hydrometallurgical process for recovery of precious metal values from precious metal ores |
| 09/24/1998 | WO1998041328A1 Fibre optic sagnac nterferometer |
| 09/23/1998 | EP0865508A1 Treatment of waste products that contain organic substances |
| 09/17/1998 | DE19710529A1 Verfahren zur Anreicherung von Silber oder anderen Wertmetallen durch Flotation aus einer Suspension, beispielsweise aus den Rückständen der Zinklaugung Method for the enrichment of silver or other precious metals by flotation from a suspension, for example, from the residues of wet extraction of zinc |
| 09/15/1998 | US5807421 Hydrometallurgical extraction process |
| 09/09/1998 | EP0863216A2 Method of treating metal/plastic composite waste material by heat decomposition |
| 09/09/1998 | EP0863138A1 A process for recovering mercapto-s-triazines from silver precipitate |
| 09/08/1998 | US5804150 Calcining sulfide ore with oxygen to form metal oxides and sulfur dioxide, forming aqueous sulfite solution, forming metal sulfates, separating gold from aqueous sulfite and sulfate solutions |
| 09/01/1998 | US5800593 Separation of clays from sulfides, oxidation and recovering metals |
| 08/26/1998 | CN1191521A Method of biotreatment for solid materials in nonstirred surface bioreactor |
| 08/25/1998 | US5797977 Neutralizing solution of chloroplatinic acid in two stages, filtering out precipitated impurities, adding hydrochloric acid and ammonium chloride, intensely heating ammonium chloroplatinate formed to yield sponge platinum |
| 08/19/1998 | CN1190676A Method for recoverying platinum from ammonia oxidation converter waste |
| 08/11/1998 | US5792235 Method for recovering gold and other precious metals from carbonaceous ores |
| 08/05/1998 | CN1189540A Furnace of retreating pozzuolite for sulfurized gold ore |
| 08/04/1998 | US5788937 Method for the recovery of silver value from aqueous solution |
| 07/28/1998 | US5785736 Elution from an ion exchange resins |
| 07/28/1998 | CA2096605C Aqueous oxidation of sulfidic silver ore |
| 07/21/1998 | US5783158 Process for treating sulfide ores containing gold and/or silver and as accompanying metal at least iron |
| 07/21/1998 | US5783062 Process for the treatment, by an electrochemical route, of compositions containing precious metals with a view to their recovery |
| 07/16/1998 | WO1998030656A1 Method of removing reactive metal from a metal-coated reactor system |
| 07/15/1998 | CN1039136C Enriching and activating and dissolving method for low grade and difficult treating noble metal materials |
| 07/14/1998 | US5779762 Method for improving the heap biooxidation rate of refractory sulfide ore particles that are biooxidized using recycled bioleachate solution |
| 07/08/1998 | CN2285775Y Continuous gold extracting apparatus |
| 07/08/1998 | CN1187220A Chloride assisted hydrometallurgical extraction of metal |
| 07/08/1998 | CN1186867A Method of extracting gold by mixed oxidant in cyaniding leaching |
| 07/01/1998 | CN1186524A Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulfide minerals |
| 07/01/1998 | CN1186523A Chloride assisted hydrometallurgical extraction of metal |
| 07/01/1998 | CN1186123A Extraction of gold from alkaline cyanide liquid |
| 06/23/1998 | US5769925 Process for the elution of precious metals absorbed on active carbon |
| 06/23/1998 | CA2193783A1 Dry chlorination of pgm-bearing chromite ores or concentrates |
| 06/23/1998 | CA2016562C Elution process for gold-iodine complex from ion-exchange resins |
| 06/23/1998 | CA2016561C Purification process for gold-bearing iodine lixiviant |
| 06/17/1998 | CN1184856A Arsenious-sulfur oven for pretreatment of vulcanizing gold ore |
| 06/16/1998 | US5766930 Method of biotreatment for solid materials in a nonstirred surface bioreactor |
| 06/10/1998 | EP0720661B1 Process for the elution of precious metals adsorbed on active carbon |
| 06/03/1998 | CN1183479A Method for extracting gold by non-cyanide desorption |
| 06/02/1998 | US5759410 Process for recovering mercapto-s-triazines from silver precipitate |
| 05/27/1998 | CN1182635A Energy-saving agitator |
| 05/27/1998 | CN1038519C Method for recovering precious metals from carbonaceous ores |
| 05/20/1998 | CN1182138A Pretreatment method and its special equipment for extracting gold from refracting sulfide ore and carbide ore |
| 05/13/1998 | EP0840808A1 Method of purifying gold |
| 05/13/1998 | CN1038348C Prodn. of metal from minerals |
| 05/12/1998 | US5749940 Method for producing high grade reduced silver |
| 05/12/1998 | US5749472 Dynamic mining system comprising hydrated multiple recovery sites and related methods |
| 04/30/1998 | WO1998017395A1 A method for processing refractory auriferous sulfide ores involving preparation of a sulfide concentrate |