| Patents for C22B 11 - Obtaining noble metals (5,080) |
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| 04/29/1998 | CN1038199C Method for recovery of platinum family metal from waste catalysts |
| 04/22/1998 | CN1179556A Method for recovering silver from deposited silver mud of waste sensitive material |
| 04/22/1998 | CN1038148C Method for recovering silver from micro-silver contained waste liquid |
| 04/14/1998 | CA2038708C Removal of base metals and cyanide from gold-barren cip solutions |
| 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 | CN1177646A Gold quick-purification method |
| 04/01/1998 | CN1037916C Method for recovering silver from wast liquor containing silver chloride |
| 04/01/1998 | CN1037915C Technology for recovery of gold from waste carbon |
| 03/25/1998 | CN1177014A Method for obtg. gold, silver and other noble metals from anode and contg. high concn. arsenic and lead |
| 03/05/1998 | WO1998008989A1 Method for microwave induced oxidation of sulphidic ore material in fluidized bed without sulphur dioxide emissions |
| 03/05/1998 | DE19634710A1 Extraction of precious metals or ores and minerals from aqueous slurry |
| 03/05/1998 | CA2263497A1 Method for microwave induced oxidation of sulphidic ore material in fluidized bed without sulphur dioxide emissions |
| 03/04/1998 | EP0826784A2 Carbon support impregnated with anthrahydroquinone and metal for treating noble metal complex ions in aqueous solution |
| 03/04/1998 | CN1037618C Method for making pure iridium |
| 02/25/1998 | CN1037532C Process for making pure palladium |
| 02/25/1998 | CN1037531C Method for producing easily volatile metals, such as zinc, lead and cadmium of sulphidic raw materials |
| 02/19/1998 | WO1998006878A1 Precious metal recovery from refractory sulphidic ores |
| 02/13/1998 | CA2183124A1 Process for obtaining access to refractory gold and/or silver in arsenical ore |
| 02/04/1998 | CN2273713Y Bucket for obtaining gold |
| 01/28/1998 | CN2273312Y Self-cooling distiller for calomel |
| 01/27/1998 | CA2050625C Process of stripping gold and silver from carbon |
| 01/21/1998 | CN1037115C Method for cyaniding extraction of carbonaceous gold ore by adding compound inhibitor |
| 01/14/1998 | CN1170043A Method and apparatus for activating and dissolving sulfide ores containing gold |
| 01/08/1998 | DE19626868A1 Gold@ crystals preparation |
| 01/08/1998 | DE19626387A1 Metal extraction process from ores, especially for precious metals |
| 01/07/1998 | EP0815270A1 Atmospheric mineral leaching process |
| 12/31/1997 | WO1997049474A1 Process for the recovery of precious metal values from aqueous ammoniacal thiosulfate leach solutions |
| 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 |
| 12/25/1997 | CA2208665A1 Method and system for extracting and refining gold from ores |
| 12/23/1997 | US5700425 Device for the pretreatment of electronic scrap |
| 12/17/1997 | CN1167833A Integrated recovery of Pb and Sn as valuable metal from chloride slag |
| 12/10/1997 | EP0546168B1 Silver recovery element and process |
| 11/26/1997 | EP0808910A2 Apparatus and method for the generation and use of ferric ions produced by bacteria |
| 11/21/1997 | CA2205151A1 Apparatus and method for the generation and use of ferric ions |
| 11/18/1997 | US5688304 Method for improving the heap biooxidation rate of refractory sulfide ore particles that are biooxidized using recycled bioleachate solution |
| 10/30/1997 | WO1997040198A1 Method for extracting gold from auriferous sand and other materials |
| 10/29/1997 | CN1036283C Recovering method for noble metal |
| 10/29/1997 | CN1036248C Process for recovering rhodium from distillationr esidues of products of oxo synthesis |
| 10/21/1997 | US5678775 Apparatus and systems that separate and isolate precious and semi-precious metals from electronic circuit boards |
| 10/14/1997 | US5676733 Separation of clay and fines; forming concentrate; leaching; oxidation of iron sufide; hydrometallurgy |
| 10/08/1997 | EP0686205B1 Recovery of zinc values from a solution containing hydrocyanic acid |
| 10/08/1997 | CN1161379A Method for extracting gold from refractory ore |
| 10/01/1997 | CN1036029C Regenerating method of photographic fixing solution |
| 09/30/1997 | US5672194 Method and apparatus for extracting precious metals from their ores and the product thereof |
| 09/17/1997 | CN1035888C Process for the recovery of noble metals and tertals and tertiary phosphines |
| 09/16/1997 | US5667557 Hydrometallurgical extraction and recovery of copper, gold, and silver via cyanidation and electrowinning |
| 09/16/1997 | US5667156 Process for the separation and isolation of precious and semi-precious metals from electronic circuit boards |
| 09/16/1997 | US5667076 Gold retrieving pan |
| 09/11/1997 | DE19609286A1 Treating granular sulphidic ore containing gold and silver with improved metal recovery |
| 09/11/1997 | DE19609284A1 Treating granular sulphidic ores containing gold and/or silver |
| 09/10/1997 | CN1158905A Extraction of gold, silver and valued metals from arsenic-and copper-bearing anode sludge |
| 09/10/1997 | CN1158904A Recovering method of platinum and lead in anode sludge from electrolytic hydrogen peroxide solution production |
| 09/09/1997 | CA2199534A1 Process of treating gold-containing sulfide ores |
| 09/09/1997 | CA2199529A1 Process of treating sulfide ores containing gold and/or silver and as accompanying metal at least iron |
| 08/21/1997 | WO1997030377A1 Regeneration of spent fixer solution |
| 08/20/1997 | CN2260089Y Equipment for removing silver by adding zinc |
| 08/06/1997 | CN1035559C Recovering method for gold from tailing pulp |
| 08/05/1997 | US5653945 Method for processing gold-bearing sulfide ores involving preparation of a sulfide concentrate |
| 07/22/1997 | US5650057 Chloride assisted hydrometallurgical extraction of metal |
| 07/09/1997 | EP0782634A1 Leaching of precious metal ore with fluoroaliphatic surfactant |
| 06/26/1997 | DE19548213A1 Recycling of electronic circuit boards with circuit tracks |
| 06/25/1997 | CN1152621A Method for extracting silver and gold in difficult infusion independent silver mine by flotating silver concentrate ore |
| 06/25/1997 | CN1152487A Method for preparation of golden powder by decomposing aerosol |
| 06/19/1997 | WO1997021842A1 Process for thermal treatment of refractory gold ores |
| 06/19/1997 | DE19546538A1 Verfahren zur thermischen Behandlung refraktärer Golderze Method for the thermal treatment of refractory gold ores |
| 06/11/1997 | CN1151443A Recovery method of rhodium |
| 06/04/1997 | CN1151033A Method for recovery silver from solid sensitive material |
| 05/28/1997 | EP0723599B1 Recovery of palladium catalyst |
| 05/15/1997 | DE19542360A1 Precipitating free and complex bonded silver from waste and photographic processing solutions |
| 05/06/1997 | US5626816 Cartridges containing metal of higher electromotive force |
| 05/06/1997 | US5626739 Electrokinetic leaching |
| 05/06/1997 | US5626647 Method for recovering gold and other precious metals from carbonaceous ores |
| 04/24/1997 | WO1997014818A1 Gold extraction process including bioflotation |
| 04/23/1997 | CN1034675C Quick-cyaniding gold-extraction method in autoclave |
| 04/23/1997 | CN1034674C Recovery method of rhodium |
| 04/22/1997 | US5623725 High strength, high density |
| 04/17/1997 | WO1997013881A1 Treatment of waste products that contain organic substances |
| 04/09/1997 | EP0767243A1 Recovery of active components from carrier or monolythic catalysts |
| 04/08/1997 | US5617955 Dynamic-mining system comprising hydrated multiple recovery sites and related methods |
| 04/02/1997 | CN1146495A Method for extracting palladium metal |
| 04/01/1997 | US5616165 Method for making gold powders by aerosol decomposition |
| 03/27/1997 | WO1997011202A1 Process for the hydrometallurgical extraction of precious metals from raw material that is difficult to process |
| 03/25/1997 | CA2041066C One step process for the treatment of parkes desilvering crust to recover zinc and produce a suitable feed for cupellation |
| 03/20/1997 | WO1997010367A1 Recovery of gold using extraction reagents having guanidyl functionality |
| 03/20/1997 | CA2231725A1 Recovery of gold using extraction reagents having guanidyl functionality |
| 03/18/1997 | US5612431 Leaching of precious metal ore with fluoroaliphatic surfactant |
| 03/18/1997 | US5611839 Method for rendering refractory sulfide ores more susceptible to biooxidation |
| 03/12/1997 | EP0761349A1 Method for making gold powders by aerosol decomposition |
| 03/12/1997 | EP0588941B1 Treating rhodium and/or ruthenium and iridium containing solutions |
| 03/05/1997 | CN1144541A Hydrometallurgical extraction process |
| 02/27/1997 | WO1997007250A1 Fluorocarbon fluids as gas carriers to aid in precious and base metal heap leaching operations |
| 02/27/1997 | CA2227581A1 Fluorocarbon fluids as gas carriers to aid in precious and base metal heap leaching operations |
| 02/26/1997 | CN1143683A Char filtering method and impact type char filter for recovering gold and silver |
| 02/26/1997 | CN1034130C Method of recoverying gold, solver and orpiment from refractory gold ore containing arsenic |
| 02/25/1997 | US5605563 Ion exchanging, precipitation, separation, circulation |
| 02/25/1997 | CA2089554C Silver recovery element and process |