| Patents for C22B 11 - Obtaining noble metals (5,080) |
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| 08/26/1994 | CA2090348A1 Recovery of zinc values from a solution containing hydrocyanic acid |
| 08/24/1994 | CN1091157A Production of metal from minerals |
| 08/23/1994 | US5340380 Using ion exchange resin with guanidine funcionality, eluting with caustic containing acid salt modifiers; gold and silver |
| 08/23/1994 | CA1331518C Process for leaching noble metals from ores and ore concentrates with cyanidic solutions while adding hydrogen peroxide |
| 08/23/1994 | CA1331515C Recovery of silver from photo sensitive materials |
| 08/19/1994 | CA2112605A1 Fire refining precious metals assay method |
| 08/17/1994 | EP0611041A1 Catchment device for platinum recovery |
| 08/16/1994 | US5338338 Improved leaching, pre-robbingly concentrating gold complex on ore, flotation, separation |
| 08/09/1994 | US5336474 Process for leaching of precious metals |
| 08/03/1994 | EP0608326A1 Process for making finely divided particles of silver metals |
| 08/03/1994 | CN1025556C Solvent extraction process |
| 07/28/1994 | CA2088204A1 Non-mechanical tank |
| 07/20/1994 | CN1089661A Description of related art |
| 07/20/1994 | CN1089523A Process for the recovery of group VIII noble metals |
| 07/13/1994 | EP0605748A1 Process and apparatus for the treatment of catalysts on metal supports |
| 07/06/1994 | CN1088992A A method for recovering gold and other precious metals from carbonaceous ores |
| 06/28/1994 | US5324851 Recovery of palladium catalyst |
| 06/22/1994 | CN1088269A Recovery method of rhodium |
| 06/14/1994 | US5320720 Extraction of precious metals from ores thereof |
| 06/14/1994 | US5320665 Leaching with thiourea, cementation with sulfur dioxide present prior to contact with steel |
| 05/17/1994 | CA1329485C Heap leaching with oxygen |
| 05/10/1994 | US5310629 Silver recovery element and method |
| 05/10/1994 | US5310413 Process and apparatus for extraction of metal values from metal bearing ores |
| 05/04/1994 | CN1086268A Separation and enrichment method for rhodium, iridium and aurum, platinum, palladium in solution |
| 04/27/1994 | EP0460203B1 Method for recovering metals from waste liquors |
| 04/19/1994 | US5304359 Dissolution of platinum group metals from materials containing said metals |
| 04/19/1994 | US5304233 Recovery of platinum group metals (PGM) from acidic solutions by reduction precipitation with sodium borohydride |
| 04/12/1994 | US5302183 Recovery of precious metals from catalyst residue |
| 04/12/1994 | CA1328352C Process for the removal of mercury from precious metal-cyanide liquors |
| 04/06/1994 | EP0590043A1 Method for processing complex metal sulphide materials |
| 04/06/1994 | EP0231309B1 Process for manufacturing electrically conductive polythiophene |
| 03/31/1994 | WO1994006944A1 A method for recovering gold and other precious metals from carbonaceous ores |
| 03/31/1994 | CA2123810A1 A method for recovering gold and other precious metals from carbonaceous ores |
| 03/09/1994 | EP0585489A1 Process for recovering noble metals from solutions deriving from the treatment of nuclear fuels |
| 03/08/1994 | US5292490 Recovery platinum group metals from oxides ores |
| 03/08/1994 | CA1327452C Separation of nickel from copper in autoclave |
| 03/02/1994 | EP0584964A1 Process for the recovery of group VIII noble metals |
| 03/01/1994 | US5290526 Processes to recover and reconcentrate gold from its ores |
| 03/01/1994 | US5290525 Demetallization, leaching and separation |
| 03/01/1994 | US5290339 Platinum recovery |
| 03/01/1994 | CA2101963A1 Process for the recovery of group viii noble metals |
| 03/01/1994 | CA1327273C Recovery of refractory gold using a combination omli process - roasting - cyanidation method |
| 02/23/1994 | EP0583362A1 Oxidative secondary rhodium recovery process |
| 02/22/1994 | US5288302 Method and apparatus for extraction of metal values from metal bearing ores |
| 02/17/1994 | WO1994003649A1 Inorganic perbromide compositions and methods of use thereof |
| 02/17/1994 | CA2141312A1 Inorganic perbromide compositions and methods of use thereof |
| 02/02/1994 | EP0580780A1 Inorganic perbromide compositions and methods of use thereof |
| 02/01/1994 | US5282884 Precipitate noble metal as tellurium alloy; separation |
| 01/18/1994 | US5279803 Precious metal recovery process from carbonaceous ores |
| 01/18/1994 | US5279802 Oxidation of metal sulfide at alkaline pH; complexing |
| 01/18/1994 | US5279644 Fire refining precious metals asay method |
| 01/18/1994 | US5279464 Comminuting metal containing and catalyst; separation |
| 01/06/1994 | WO1994000608A1 Electrokinetic leaching |
| 01/06/1994 | WO1994000606A1 Production of metals from minerals |
| 01/05/1994 | CN1080325A Method for producing easily volatile metals, such as zinc, lead and cadmium, of sulphidic raw materials |
| 01/04/1994 | US5275791 Agitation; adding diluted hydrogen peroxide; measuring dissolved oxygen concentration; adding manganese(II) salt |
| 12/08/1993 | CN1079258A Process for producing manganese sulfate and extracting silver from manganese-silver ore |
| 12/07/1993 | CA1325016C Process for the recovery of rhodium from aqueous solutions containing rhodium complexes |
| 12/07/1993 | CA1325015C Recovery process |
| 11/30/1993 | US5266203 Method for treating process streams containing cyanide and heavy metals |
| 11/24/1993 | EP0570942A1 Method for producing easily volatile metals, such as zinc, lead and cadmium, of sulfidic raw materials |
| 11/23/1993 | US5264600 Process for the recovery of rhodium from residues of the distillation of products of the oxo synthesis |
| 11/16/1993 | US5263044 Remelting method for recognition and recovery of noble metals and rare metals |
| 11/16/1993 | US5262136 Recovery of gold and silver from complex refractory sulphide ores by cyanidisation and oxidation with peroxides |
| 11/16/1993 | US5261945 Reduction precipitation with alkali metal borohydride |
| 11/09/1993 | US5260040 Reacting sample with thiourea and ferric ions while adding a complexing agent for ferric ions consumption of thiourea is reduced |
| 11/03/1993 | CN2145195Y Supersound strengthen dipping gold apparatus |
| 11/03/1993 | CN1077908A Recovery of rh from residue of reaction of carbonation |
| 11/02/1993 | CA1323854C Process for the recycling of electrical batteries, assembled printed circuit boards and electronic components |
| 10/28/1993 | WO1993019212A3 Recovery of precious metal |
| 10/26/1993 | US5256189 With zinc added to slurry before oxidation to render silver more extractable by cyanide leaching |
| 10/26/1993 | US5256188 Process for the separation of rhodium from organic solutions |
| 10/20/1993 | EP0565800A2 Process for the recovery of noble metals and tertiary phosphines |
| 10/20/1993 | EP0565518A1 Silver recovery from spent photographic solutions. |
| 10/20/1993 | EP0479814B1 Dissolving values of platinum group metals from ores and concentrates |
| 10/19/1993 | US5254153 Cyanide recycling process |
| 10/17/1993 | CA2094113A1 Methods and systems for contaminant removal by solvent leaching |
| 10/13/1993 | EP0564862A1 Process for recovering rhodium from waste material generated in carbonylation reactions |
| 10/13/1993 | CN1022423C Disposal method of tallings water contained Cn for a chlorinated gold extracting shop |
| 10/12/1993 | US5252305 Heating and melting with copper or its oxide and flux material to absorb PT group metal, separation |
| 10/12/1993 | CA1322855C Process for refining gold and apparatus employed therefor |
| 10/05/1993 | US5250273 Recovering gold, uranium, copper, zinc, mickel and lead from ores, calcines |
| 10/05/1993 | US5250272 Process for leaching precious metals with hydrogen-peroxide and a cyanide leaching solution |
| 10/05/1993 | CA1322657C Treating refractory gold ores via oxygen enriched roasting |
| 09/30/1993 | WO1993019212A2 Recovery of precious metal |
| 09/22/1993 | CN1076543A Process for trapping gaseous ruthenium on polyvinyl pyridine, more particularly usable for recovering radioactive ruthenium from irradiated nuclear fuels |
| 09/21/1993 | CA2063694A1 Ammonia extraction of gold and silver from ores and other materials |
| 09/16/1993 | WO1993018190A1 Composition and method for agglomerating ore |
| 09/14/1993 | US5244777 Method of recovering silver from photographic processing solutions |
| 09/08/1993 | EP0559536A1 Process for gettering gaseous ruthenium onto polyvinylpyridine, in particular useful for the recuperation of radioactive ruthenium from irradiated nuclear fuels |
| 09/04/1993 | CA2090810A1 Process for trapping gaseous ruthenium on polyvinyl pyridine, more particularly usable for recovering radioactive ruthenium from irradiated nuclear fuels |
| 09/01/1993 | EP0557274A1 Recovery of palladium. |
| 08/24/1993 | US5238662 Processes for recovering precious metals |
| 08/24/1993 | US5238485 Method for the assay and recovery of precious metals |
| 08/17/1993 | US5236676 Pressure chlorination of refractory gold ores |
| 08/17/1993 | US5236492 Recovery of precious metal values from refractory ores |
| 08/12/1993 | DE4203475A1 Recovering precious metals, esp. from electronic components - where components are charged into heated metal melt, the gaseous plastics components are burned in oxygen-enriched air, etc. |
| 08/10/1993 | CA1321077C Process for the recovery of silver from zinc plant calcines and neutral or low acid leach residues with thiourea |
| 08/03/1993 | US5232491 Milling |
| 08/03/1993 | US5232490 Oxidation/reduction process for recovery of precious metals from MnO2 ores, sulfidic ores and carbonaceous materials |