| Patents for C22B 11 - Obtaining noble metals (5,080) |
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| 08/03/1993 | US5232486 Heating the alloys in hermetic sealed furace at low pressure to vaporizing the zinc and condensing to solids |
| 07/28/1993 | EP0552846A1 Recovery of precious metals from catalyst residue |
| 07/24/1993 | CA2087808A1 Recovery of precious metals from catalyst residue |
| 07/22/1993 | WO1993014231A1 Cyanide recycling process |
| 07/21/1993 | EP0551593A1 Process for the separation of rhodium from organic solutions |
| 07/20/1993 | US5229085 Using pure oxygen gas instead of air |
| 07/16/1993 | CA2077488A1 Process for the separation of rhodium from organic solutions |
| 07/07/1993 | CN1073986A Process for the recovery of noble metals and tertals and tertiary phosphines |
| 07/07/1993 | CN1073985A Method for agglomeration of gold and its coenobiums by coal-oil ploymers |
| 06/29/1993 | US5223023 Recovery of gold from solution by reduction-precipitation with stabilized alkali metal borohydride |
| 06/16/1993 | EP0546324A1 Process for the recovery of precious metals |
| 06/16/1993 | EP0546168A1 Silver recovery element and process |
| 06/16/1993 | EP0546153A1 Silver recovery process |
| 06/08/1993 | CA1318768C Cyanide recovery process |
| 06/02/1993 | CN1072729A Smelting method for antimon-gold mine containing low ferrous sulfide (fes) |
| 06/02/1993 | CN1021059C Treatment method for lower grade goldmine |
| 06/01/1993 | US5215575 Recovery of gold, silver and platinum group metals with various leachants at low pulp densities |
| 06/01/1993 | US5215574 Method of improving precious metal yield in a Merrill-Crowe recovery process |
| 06/01/1993 | CA1318641C Process and apparatus for recovering precious metals from soil materials |
| 06/01/1993 | CA1318480C Cyanide regeneration process |
| 05/25/1993 | US5213609 Recovering gold from ore, peroxysulfuric acid, alkaline cyanide solution |
| 05/19/1993 | CN1072120A Process for making finely divided particles of silver metals |
| 05/11/1993 | US5210009 System for recovering silver from a photographic developer solution |
| 04/29/1993 | WO1993008310A1 Extraction or recovery of metal values |
| 04/29/1993 | WO1993007980A1 Process for making finely divided particles of silver metals |
| 04/29/1993 | CA2119240A1 Extraction or recovery of metal values |
| 04/28/1993 | CN1071465A Gold-extracting process with liquid film of soaking while grinding |
| 04/28/1993 | CN1020381C Conversion treatment of lead-base gold or lead ores with soda |
| 04/27/1993 | US5206000 Process for the recovery of rhodium from aqueous solutions containing rhodium complexes |
| 04/27/1993 | US5205858 Cyanide extraction coupled with carbon adsorption; slurrying; flotation; drying; direct fusion |
| 04/14/1993 | EP0537133A1 Process for the preparation of platinum of high purity |
| 03/30/1993 | US5198021 Ion exchange resin adsorption |
| 03/24/1993 | CN1070229A Process for extracting gold and recovering sodium cyanide by emulsifying liquid film method |
| 02/23/1993 | US5188662 Silver recovery process |
| 02/23/1993 | US5188660 Process control by adding aqueous solution of silver salt and formate into heated |
| 02/03/1993 | CN1068600A Gold dissolving process and liquid for gold coated article |
| 01/21/1993 | DE4122717A1 Recovery of precious metals from automotive catalytic converter - includes crushing metallic substrate and coatings into particles of differing weight, shape, and size and mechanically sepg. the precious particles |
| 01/12/1993 | US5178665 Precipitation, heating; purification |
| 01/07/1993 | DE4122729A1 Recovery of silver@ from suspension after enzymatic sepn. from film waste - by acidifying, flocculating with sodium sulphite and precoat filtration |
| 01/05/1993 | US5176886 In cyanide complex form, contact with strong base, elution with solvent |
| 12/29/1992 | WO1993000611A1 Silver recovery element and process |
| 12/29/1992 | WO1993000610A1 Silver recovery process |
| 12/25/1992 | CA2072188A1 Metal recovery process |
| 12/23/1992 | WO1992022674A1 Low pressure drop, high surface area platinum recovery system in a nitric acid plant |
| 12/23/1992 | EP0519701A1 Low pressure drop, high surface area platinum recovery system in a nitric acid plant |
| 12/23/1992 | CN1067271A Process for extracting au or ag using mixture of lime and sulfur |
| 12/23/1992 | CN1067270A Process for compounding mixture of lime and sulfur for extracting au or ag |
| 12/23/1992 | CA2111198A1 Low pressure drop, high surface area platinum recovery system in a nitric acid plant |
| 12/22/1992 | US5173247 Polystyrene support particles, steel ion exchanger |
| 12/20/1992 | WO1992022673A1 Method for processing complex metal sulphide materials |
| 12/20/1992 | CA2102791A1 Method for processing complex metal sulphide materials |
| 12/15/1992 | US5171546 Use of thioether ligands for separating palladium from aqueous solutions and in particular nitric solutions for dissolving irradiated nuclear fuel elements |
| 12/15/1992 | CA1311362C Screen cleaning in cil and cip systems |
| 12/10/1992 | WO1992021419A1 Treating rhodium, iridium and ruthenium solutions |
| 12/08/1992 | US5169883 Product for the absorption of dissolved ions |
| 12/07/1992 | CA2070723A1 Glandox: extraction of metal values from metal bearing ores |
| 12/07/1992 | CA2070722A1 Multox: extraction of metal values from metal bearing ores |
| 12/04/1992 | CA2103144A1 Treating rhodium, iridium and ruthenium solutions |
| 11/29/1992 | CA2069173A1 Process and device for recovering gold particles |
| 11/12/1992 | WO1992019779A1 Oxidative secondary rhodium recovery process |
| 11/11/1992 | EP0512959A2 Process of recovering platinum group metal |
| 11/11/1992 | EP0512247A2 Method for leaching gold and silver |
| 11/10/1992 | US5162404 Ion-absorbent sponge product |
| 11/10/1992 | US5162105 Processes to recover and reconcentrate gold from its ores with microorganisms |
| 11/04/1992 | CA2067841A1 Process for leaching gold and silver |
| 11/04/1992 | CA2061825A1 Oxidative secondary rhodium recovery process |
| 10/29/1992 | WO1992018654A1 Process for the treatment of ion flotation froths |
| 10/29/1992 | WO1992018422A1 Inorganic perbromide compositions and methods of use thereof |
| 10/29/1992 | WO1992018249A1 The recovery of a valuable species from an ore |
| 10/29/1992 | CA2107895A1 Inorganic perbromide compositions and methods of use thereof |
| 10/28/1992 | EP0510358A1 Recovery process of rhodium contained in the distillation residue from the oxosynthesis production |
| 10/28/1992 | EP0510297A2 One step process for the treatment of Parkes desilvering crust to recover zinc and produce a suitable feed for cupellation |
| 10/23/1992 | WO1992018655A1 Method for extraction of gold and silver from mineral raw material |
| 10/23/1992 | CA2086008A1 Method for recovering gold and silver from ore starting materials |
| 10/22/1992 | DE4042031A1 Selectively sepg. platinum@ and palladium@ from soln. - by adding oxidising agent and boiling to remove chloride ions followed by precipitating out palladium@ by adding bromide ions |
| 10/14/1992 | EP0508542A2 Process for treating ore having recoverable metal values including arsenic containing components |
| 10/14/1992 | CN1065220A Process for recovering rhodium from distillation residues of products of oxo synthesis |
| 10/07/1992 | CN2118078U Vibrating continuous automatic mercury mixer |
| 10/06/1992 | US5152969 Processes to recover and reconcentrate gold from its ores with microorganisms |
| 09/16/1992 | CN2116011U Tower-type immersing-by-grinding machine |
| 09/15/1992 | US5147619 Feeding a sludge containing fine particles of nickel catlayst and fat into a fluidized bed, combustion or degradation of fat to produce waste gases and separating catalysts particles from fluidized bed and waste gases |
| 08/25/1992 | US5142549 Remelting apparatus and method for recognition and recovery of noble metals and rare earths |
| 08/25/1992 | CA1306613C Recovery of gold from aqueous solutions |
| 08/18/1992 | US5139752 Pulverizing ore, complexing metal, dissolving complex |
| 08/06/1992 | WO1992012779A1 A rapid, ambient-temperature process for stripping gold bound to activated carbon |
| 07/28/1992 | US5133846 Silver recovery device |
| 07/02/1992 | DE4042030A1 Platinum pptn. from nitric acid also contg. silver and palladium - with ammonium chloride, excess chloride and oxidant after precipitating silver as chloride |
| 07/01/1992 | EP0492691A1 Two-step method for recovering dispersed noble metals |
| 07/01/1992 | CN1062302A Magnetic carbon and process for extracting gold with magnetic carbon as adsorbent |
| 07/01/1992 | CN1017216B Recovery of noble metals |
| 06/23/1992 | CA1303859C Process for recovery of silver from spent, waste, acidic processing fluids |
| 06/16/1992 | US5122185 Bringing lost precious metal into contact with a foraminate element fabricated from palladium by itself or with a minor amount of another metal |
| 06/15/1992 | CA2032357A1 Pressure oxidation methods for gold extraction and toxic waste treatment |
| 06/09/1992 | US5120443 Processes for removing, separating and concentrating rhodium, iridium, and ruthenium from solutions using macrocyclic and nonmacrocyclic polyalkylene-polyamine-containing ligands bonded to inorganic supports |
| 06/09/1992 | US5120353 Hydrometallurgic method for processing raw materials containing zinc sulphide |
| 06/02/1992 | US5118344 From silver halide emulsion |
| 05/26/1992 | US5116417 Heap leach bed of gold or silver and a binder of lime, gypsum, and fly ash |
| 05/19/1992 | US5114687 Using ammonia and ammonium salts for extraction followed by oxidation and heating |
| 05/19/1992 | CA1300893C Fluidised bed process |
| 05/16/1992 | WO1992008812A1 Base metals recovery by adsorption of cyano complexes on activated carbon. |