| Patents for C22B 11 - Obtaining noble metals (5,080) |
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| 08/27/2002 | US6440194 Recovery of precious metals from metal alloys produced aluminothermically from base metal smelter slag |
| 08/27/2002 | CA2204842C Method for producing high grade reduced silver |
| 08/22/2002 | WO2002018663A3 Selective recovery of aluminium, cobalt and platinum values from a spent catalyst composition |
| 08/22/2002 | US20020112569 Grinding precious-metal-containing solids, leaching with hydrochloric acid and oxidizing agent, decanting, filtering, precipitating base metals, filtering, precipitating precious metals with reducing agent |
| 08/21/2002 | CN1365397A Apparatus for heating flowing material containing solids |
| 08/14/2002 | EP1231285A1 Process and equipment for the separation of gold particles |
| 08/14/2002 | EP1230408A1 Recovery of precious metals from coal burning slag by multiple crushing/suspension stages |
| 08/14/2002 | EP1229977A1 Polyamide-containing ligands covalently bonded to supports, polyamide-containing resins, and methods for removing metals from solutions |
| 08/14/2002 | CN1363696A Process for removing As and S elements from high-As and high-S gold ore concentrate |
| 08/13/2002 | CA2264865C A method for processing refractory auriferous sulfide ores involving preparation of a sulfide concentrate |
| 08/13/2002 | CA2232631C Treatment of waste products that contain organic substances |
| 08/08/2002 | WO2002061156A1 Method for separating, enriching and recovering palladium |
| 08/07/2002 | CN1362532A Amminochloride process of purifying gold |
| 08/06/2002 | US6428679 Electrodeposition of silver in form of silver metal and redissolution of deposited silver to give final solution, in which electrodeposition is carried out at prescribed current and both steps are carried out in same apparatus |
| 08/06/2002 | US6428602 Method for recovering platinum from platinum-containing coatings on gas turbine engine components |
| 08/06/2002 | US6428597 Using polyoxypropylene glycol, an alkylphenol ethoxylate and a paraffin oil solvent |
| 08/01/2002 | WO2002059387A1 Process for recovering palladium from a solution |
| 07/31/2002 | EP1226284A1 Apparatus for heating flowing material containing solids |
| 07/24/2002 | EP1224972A1 A method for recovering catalytic metals from a colloidal solution |
| 07/24/2002 | CN1360063A Temp-controlled multi-stage sinter process and equipment for fixating S and As of impregnated superfine gold ore |
| 07/23/2002 | US6423117 Extraction of valuable metal by acid cyanide leach |
| 07/18/2002 | US20020092377 Method for thiosulfate leaching of precious metal-containing materials |
| 07/16/2002 | US6419986 Supplying getter; removal; fixing |
| 07/11/2002 | WO2002053788A1 Method for the recovery of base and precious metals by extractive chloridation |
| 07/04/2002 | WO2002028529A3 Ion exchanging resins for gold cyanide extraction |
| 07/03/2002 | EP1218797A1 Method to extract silver from a photographic developer |
| 07/02/2002 | US6413296 Cyanide leaching of gold tellurides at 60-80 degrees c in alkaline environment with entrained air; no pretreatment; increased yield |
| 06/25/2002 | US6410304 Method of biotreatment for solid materials in a nonstirred surface bioreactor |
| 06/25/2002 | US6409798 Process for recovering metal material from waste material |
| 06/20/2002 | US20020074265 Method and equipment for separating gold particles |
| 06/18/2002 | US6406675 Method for reducing cyanide consumption during processing of gold and silver ores to remove base metals |
| 06/13/2002 | WO2002046483A2 Silver stain removal from dna detection chips by cyanide etching or sonication |
| 06/11/2002 | US6401635 Liquid carton waste material recycling process and apparatus for recycling liquid carton waste material |
| 06/06/2002 | WO2002008474A3 Processing elemental sulfur-bearing materials using high temperature pressure leaching for sulfuric acid production and metal recovery |
| 06/05/2002 | CN1352310A Technological method for reextracting gold from cyanide gold refining wast slag |
| 05/21/2002 | US6391165 Reclaiming cadmium and tellurium from solar cells |
| 05/21/2002 | US6390395 Using cesium or rubidium salt |
| 05/21/2002 | CA2360608A1 Recovery of precious metals from metal alloys produced aluminothermically from base metal smelter slag |
| 05/14/2002 | US6387243 Contactors cationic exchange resin with solvent; circulationdirect current |
| 05/14/2002 | US6387155 Method for recovering metal values from concentrates of sulfide minerals |
| 05/14/2002 | CA2038165C Process for recovery of gold from refractory ores |
| 05/10/2002 | WO2002036837A1 Chromatographic method of separating ruthenium from platinum group metals |
| 05/10/2002 | WO2002004919A3 Method and apparatus for the assay of precious metals |
| 05/08/2002 | DE10053491A1 Processing shredder residues of metal-containing waste comprises producing raw shred fraction by separating ferromagnetic fraction, non-ferrous metal-containing fraction, granulate fraction and sand fraction |
| 05/07/2002 | US6383460 Subjecting the concentrate containing nickel and cobalt hydroxide to a leaching stage with an ammonium solution to produce a leach solution containing nickel or cobalt values and a residue, and controlling the concentration of metals |
| 05/07/2002 | CA2176147C Biooxidation of refractory sulfide ores |
| 05/02/2002 | WO2002034399A1 Installation and method for processing shredder residues and use of a shred fraction so produced |
| 04/25/2002 | WO2002033135A1 Precious metal scavenging from a liquid medium with a functionalised polymer fiber |
| 04/24/2002 | CN1346334A Sodium cyanide paste composition |
| 04/23/2002 | CA2163058C Improvements to precious metals recovery from ores |
| 04/16/2002 | CA2169140C Gold recovery from refractory carbonaceous ores by pressure oxidation and thiosulfate leaching |
| 04/11/2002 | WO2002028529A2 Ion exchanging resins for gold cyanide extraction |
| 04/09/2002 | CA2203258C Method for heap biooxidation of ore |
| 04/04/2002 | WO2001098548A3 Chromatographic interseparation of platinum group metals |
| 04/03/2002 | CN1342786A Process for preparing high-purity gold by electrolyzing extracted gold-contained organic phase |
| 04/03/2002 | CN1082031C Method of biotreatment for solid materials in nonstirred surface bioreactor |
| 04/02/2002 | US6365049 Chromatography separation |
| 04/02/2002 | US6364931 Hydrochloric acid solution of actual feedstocks; no prior separation required; ion-exchange gel chromatography |
| 03/28/2002 | US20020037245 Method for segregating metals and minerals from one another by leaching |
| 03/27/2002 | EP1190203A1 Protection coating of wear-exposed components used for refining molten metal |
| 03/27/2002 | EP1190105A1 Recovery of noble metals by lixiviation with thiourea controlled acidic solution |
| 03/26/2002 | CA2356050C Process for the solvent extraction of nickel and cobalt values in the presence of magnesium ions from a solution |
| 03/26/2002 | CA2356048C Process for the recovery of nickel and/or cobalt from a concentrate |
| 03/21/2002 | WO2002022899A2 Removal of base metals during cyanide/cip processing of gold and silver ores |
| 03/21/2002 | US20020033076 Comminution, slurrying, heating, controlling temperature |
| 03/14/2002 | WO2002020857A1 Method for producing silver having high purity |
| 03/14/2002 | WO2002020451A1 Recovery of metals by incineration of metal containing basic ion exchance resin |
| 03/13/2002 | EP1185717A1 Oxidative pressure leach recovery of precious metals using halide ions |
| 03/13/2002 | CN1339611A Method for recovering silver-platinum from platinum containing silver iodide slag |
| 03/12/2002 | US6355175 Method for separating and isolating precious metals from non precious metals dissolved in solutions |
| 03/12/2002 | CA2294176C Nozzle for low pressure flash tanks for ore slurry |
| 03/07/2002 | WO2002018663A2 Selective recovery of aluminium, cobalt and platinum values from a spent catalyst composition |
| 03/07/2002 | WO2001083835A3 Gold recovery process with hydrochloric acid lixiviant |
| 02/20/2002 | CN1336251A Catalysis type ammonia prepn. method, and method of prepn. and recovery of catalyst of ammonia synthesis |
| 02/13/2002 | EP1179604A2 Method of extracting metals from minerals by bioleaching |
| 02/10/2002 | CA2327532A1 Method of extraction of metals from minerals |
| 02/06/2002 | EP1036056B1 Process to separate rhodium from an organic mixture |
| 02/05/2002 | US6344068 Process for recovering gold from thiosulfate leach solutions and slurries with ion exchange resin |
| 02/05/2002 | US6344067 Precious metal-containing concentrates are subjected to high temperature chlorination using hcl gas, an optional reduction, an oxidation and finally a reduction, to remove most of the base metals especially the amphoteric elements. |
| 02/01/2002 | CA2354376A1 Material treatment method and apparatus |
| 01/31/2002 | WO2002008474A2 Processing elemental sulfur-bearing materials using high temperature pressure leaching for sulfuric acid production and metal recovery |
| 01/31/2002 | US20020012621 Process for the recovery of nickel and / or cobalt from a concentrate |
| 01/29/2002 | US6342539 Non-metallic constituent components of printed wiring assemblies and printed wiring boards |
| 01/29/2002 | US6342190 Grinding crushed ore chunks in dry environment to size that can be moved by blowing, mixing with air, flash roasting mixture to heat ore, quenching in quenching chamber water bath to cool ore, causing ore to crack and break down |
| 01/17/2002 | WO2002004919A2 Method and apparatus for the assay of precious metals |
| 01/16/2002 | CN1331760A Method for extracting anions of IVB to VIII metals using alkyl-substituted 1,3-diaminopropanes |
| 01/10/2002 | US20020004451 Ruthenium and promoter on catalyst support |
| 01/09/2002 | EP1170255A2 Process for catalytic ammonia production-preparation and recovery of ammonia synthesis catalyst |
| 01/09/2002 | CN1077604C Technlogy for gold immersion by cyanide process with mixed auxiliary |
| 01/08/2002 | US6337056 Fixing cyanide complexes on ion exchange resin, etching with hydrochloric-nitric acid, separating chlorides of gold, platinum, palladium, treating with ammonium chloride, precipitating |
| 01/08/2002 | CA2221940C Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulphide ores |
| 01/06/2002 | CA2352548A1 Process for catalytic ammonia production-preparation and recovery of ammonia synthesis ruthenium catalyst |
| 01/03/2002 | WO2002000951A1 Method for producing platinum material reinforced with dispersed oxide |
| 01/02/2002 | EP1167555A1 Chromatographic interseparation of platinum group metals |
| 01/02/2002 | EP1165847A1 Cyanide recovery from aqueous ore processing solutions by solvent extraction |
| 12/27/2001 | WO2001098548A2 Chromatographic interseparation of platinum group metals |
| 12/26/2001 | CN1076758C All-mud zinc cyanid powder substitution and carbon pulp adsorption series-connection gold-extracting method |
| 12/25/2001 | US6333438 Hydroxylating adamantane compound in water/organic two-phase system in presence of ruthenium compound and hypochlorite salt, mixing product liquid with oxidizing agent, permitting mixture to separate, thereby extracting ruthenium compound |
| 12/19/2001 | CN1327483A Process and equipment for separation of gold particles |
| 12/19/2001 | CN1076401C Process for preparing gold by reduction of gold-contained chlorated liquid |