| Patents for C22B 61 - Obtaining metals not elsewhere provided for in this subclass (484) |
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| 01/24/2002 | US20020009402 Method of producing an active mineral liquid from granite |
| 10/23/2001 | CA2035591C Thallium separation process |
| 10/10/2001 | CN1072729C Method for recovering cobalt from cobalt containing waste catalyst used in carbonylation synthesizing process |
| 09/27/2001 | WO2001032943A3 Atmospheric leach process for the recovery of nickel and cobalt from limonite and saprolite ores |
| 09/19/2001 | EP1133576A1 Recovering metals from soil |
| 09/04/2001 | US6284013 Semiconductor thin film applications; ozone-containing gas conversion into ruthenium tetraoxide, blowing chlorine gas into sodium hydroxide solution; absorbing in acid, evaporating, salting out and sintering in hydrogen atmosphere |
| 07/17/2001 | US6261527 Atmospheric leach process for the recovery of nickel and cobalt from limonite and saprolite ores |
| 07/11/2001 | EP1114796A1 Process for the winning of osmium and ruthenium from precious metal concentrates |
| 07/05/2001 | US20010006612 Concentrate, by treating with nitric acid, then heating the suspension, collecting osmium tetroxide in a hydroxide absorption solution, and alkalinizing the remaining suspension, then finally oxidative extraction of ruthenium |
| 05/10/2001 | WO2001032943A2 Atmospheric leach process for the recovery of nickel and cobalt from limonite and saprolite ores |
| 05/10/2001 | CA2389635A1 Atmospheric leach process for the recovery of nickel and cobalt from limonite and saprolite ores |
| 05/03/2001 | DE10000274C1 Process for recovering osmium and ruthenium from precious metal concentrates comprises collecting osmium tetroxide in an absorption solution and leaching out ruthenium with an agent |
| 04/04/2001 | EP0854765B1 Process for the production of ultrafine particles |
| 03/20/2001 | US6203768 Process for the production of ultrafine particles |
| 01/30/2001 | US6179981 Method for separating technetium from a nitric solution |
| 12/14/2000 | WO2000047784A3 Method for producing metallic silicon |
| 12/05/2000 | CA2076613C Recovery of thallium from metallurgical flue dusts |
| 08/17/2000 | WO2000047784A2 Method for producing metallic silicon |
| 08/09/2000 | EP1026283A1 Method for preparing high purity ruthenium sputtering target and high purity ruthenium sputtering target |
| 05/31/2000 | CN1053017C Method for extracting palladium metal |
| 05/18/2000 | WO2000028093A1 Recovering metals from soil |
| 05/02/2000 | CA2138777C Production of metals from minerals |
| 03/14/2000 | US6036932 Method for purification of silicon |
| 03/14/2000 | US6036741 Process for producing high-purity ruthenium |
| 01/27/2000 | WO2000004202A1 Method for preparing high purity ruthenium sputtering target and high purity ruthenium sputtering target |
| 01/27/2000 | CA2278834A1 Improved tellurium extraction from copper electrorefining slimes |
| 01/12/2000 | CN1048250C Macrocyclic polyether cryptand joined to inorganic carrier, and process for removing, separating and concentrating metals |
| 09/15/1999 | EP0646185B1 Production of metals from minerals |
| 08/17/1999 | US5939042 Extracting from mixture with silver by slurrying, adding selenium, sulfur, leaching, separation |
| 07/08/1999 | DE19858560A1 Caustic soda stripping of rare earth-loaded liquid ion exchanger used in solvent extraction |
| 06/01/1999 | US5908489 Process for removing antimony from hydrofluoric acid solutions which contain Ta/Nb |
| 02/02/1999 | CA2143254C Method for the removal of thallium |
| 01/14/1999 | WO1999001591A1 Method for separating technetium from a nitric solution |
| 01/13/1999 | EP0789784B1 Process for decomposing and recovering the metal components from superalloys |
| 12/23/1998 | EP0854765A4 Process for the production of ultrafine particles |
| 11/11/1998 | CN1040663C Recovery of palladium catalyst |
| 10/14/1998 | EP0701630B1 Solid bonded oxygen-donor macrocyclic ligands for removing and concentrating metals |
| 07/29/1998 | EP0854765A1 Process for the production of ultrafine particles |
| 07/07/1998 | US5776329 Method for the decomposition and recovery of metallic constituents from superalloys |
| 06/23/1998 | US5770126 High producing rate of nano particles by laser liquid interaction |
| 06/17/1998 | CN1184858A Method for recovering cobalt from cobalt contg. waste catalyst used is carbonylation syntehsizing process |
| 05/13/1998 | CN1038348C Prodn. of metal from minerals |
| 12/16/1997 | US5698169 Methods and agents for the extraction of cesium and strontium from nuclear waste |
| 11/25/1997 | US5691211 Method for gettering noble metals from mineral acid solution |
| 11/20/1997 | DE19619228A1 Removing antimony from hydrofluoric acid solutions |
| 11/18/1997 | CA2047728C Process for recovering germanium |
| 09/09/1997 | US5666642 Extraction of cesium and strontium ions from nuclear waste |
| 08/20/1997 | EP0789784A1 Process for decomposing and recovering the metal components from superalloys |
| 07/31/1997 | WO1997027143A1 Production of high purity silicon metal, aluminium, their alloys, silicon carbide and aluminium oxide from alkali alkaline earth alumino silicates |
| 06/11/1997 | CN1151443A Recovery method of rhodium |
| 05/28/1997 | EP0723599B1 Recovery of palladium catalyst |
| 04/23/1997 | CN1034674C Recovery method of rhodium |
| 04/03/1997 | WO1996039702A3 Methods and agents for the extraction of cesium and strontium from nuclear waste |
| 04/02/1997 | CN1146495A Method for extracting palladium metal |
| 04/01/1997 | CA2049276C Method of tellurium separation from copper electrorefining slime |
| 03/19/1997 | EP0701630A4 Process for removing, separating, and concentrating metals |
| 03/13/1997 | WO1997009454A1 High production rate of nano particles by laser liquid interaction |
| 03/06/1997 | WO1997007917A1 Process for the production of ultrafine particles |
| 02/11/1997 | US5603074 Preparation and use of tetra-alkyl cobalt dicarbollide for extraction of cesium and strontium into hydrocarbon solvents |
| 12/12/1996 | WO1996039702A2 Methods and agents for the extraction of cesium and strontium from nuclear waste |
| 10/24/1996 | WO1996033132A1 Extraction of cesium and strontium ions from nuclear waste |
| 10/09/1996 | CN1133071A Recovery of palladium catalyst |
| 08/14/1996 | EP0726329A1 A method for separating technetium and apparatus therefor |
| 07/31/1996 | EP0723599A1 Recovery of palladium catalyst |
| 07/10/1996 | CN1126499A Process for removing, separating, and concentrating metals |
| 05/17/1996 | WO1996014440A1 Process for decomposing and recovering the metal components from superalloys |
| 05/09/1996 | DE4439041A1 Verfahren zum Aufschluß und Rückgewinnung der metallischen Bestandteile aus Superlegierungen Method for the decomposition and recovery of metallic components from superalloys |
| 03/26/1996 | US5501767 Method for gettering noble metals from mineral acid solution |
| 03/20/1996 | EP0701630A1 Solid bonded oxygen-donor macrocyclic ligands for removing and concentrating metals |
| 02/07/1996 | EP0695369A1 Method for accelerated bioremediation and method of using an apparatus therefor |
| 01/30/1996 | US5487819 Production of metals from minerals |
| 11/21/1995 | CA1337578C Method for removing thallium from pig-lead and high-purity lead |
| 09/19/1995 | CA1337019C Biorecovery of selenium |
| 08/22/1995 | US5443731 Process for extracting technetium from alkaline solutions |
| 05/30/1995 | US5419882 Adsorption by manganese dioxide sludge |
| 05/23/1995 | US5417942 Process for trapping gaseous ruthenium on polyvinyl pyridine, more particularly usable for recovering radioactive ruthenium from irradiated nuclear fuels |
| 04/20/1995 | WO1995010636A1 Recovery of palladium catalyst |
| 04/05/1995 | EP0646185A1 Production of metals from minerals |
| 02/28/1995 | US5393892 Processes for removing, separating and concentrating lead, thallium, alkali metals, alkaline earth metals from concentrated matrices using macrocyclic polyether cryptand ligands bonded to inorganic supports |
| 11/30/1994 | CN1026800C Processing for removal of thallium from coarse lead |
| 11/24/1994 | WO1994026943A1 Process for removing, separating, and concentrating metals |
| 11/15/1994 | US5364445 Recovery method of rhodium |
| 08/24/1994 | CN1091157A Production of metal from minerals |
| 08/09/1994 | US5336450 Process to remove rare earth from IFR electrolyte |
| 08/02/1994 | CA1331099C Removal of thallium from impure lead |
| 08/02/1994 | CA1331098C Recovery of thallium |
| 06/28/1994 | US5324851 Recovery of palladium catalyst |
| 06/22/1994 | CN1088269A Recovery method of rhodium |
| 03/30/1994 | EP0468978B1 Process for recovering germanium |
| 03/22/1994 | US5296204 Thallium extraction process |
| 01/06/1994 | WO1994000606A1 Production of metals from minerals |
| 12/21/1993 | US5271909 Method of tellurium separation from copper electrorefining slime |
| 11/03/1993 | EP0568407A1 Process for reclaiming used Rhenium |
| 09/22/1993 | CN1076543A Process for trapping gaseous ruthenium on polyvinyl pyridine, more particularly usable for recovering radioactive ruthenium from irradiated nuclear fuels |
| 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 |
| 08/17/1993 | US5236491 Contacting with selective anionic resin; maintaining pH between 4.0 and 5.5; elution with mineral acid; treating eluate |
| 07/06/1993 | CA1319826C Treatment of sulphuric acid solutions containing tellurium, copper sulphate and minor impurity elements |
| 04/07/1993 | EP0535837A1 Decontamination of radioactive metals |
| 02/24/1993 | EP0528361A1 Improved method of tellurium separation from copper electrorefining slime |