| Patents for C22B 11 - Obtaining noble metals (5,080) |
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| 09/19/1989 | CA1259471A1 Catalyst recovery process |
| 09/13/1989 | EP0332314A2 Solvent extraction process |
| 08/30/1989 | EP0330335A1 Precious metal refining |
| 08/22/1989 | US4859293 Making gold iodide solution in electrolytic cell; basification, reduction, precipitation |
| 08/22/1989 | US4859236 Process for producing molybdenum-ruthenium metal powder |
| 08/16/1989 | EP0327695A1 Process for leaching gold and silver from ores and concentrates as well as from precious metal-bearing wastes and scrap by the use of cyanidic leach solutions |
| 08/15/1989 | US4857107 Gold inquartation process |
| 08/08/1989 | US4854552 Apparatus for recovery of silver from spent, waste, acidic processing fluids |
| 08/01/1989 | CA1257970A1 Process to manufacture silver chloride |
| 07/26/1989 | EP0221136B1 Catalyst recovery process |
| 07/25/1989 | US4851129 Process for the detoxification of effluents from ore processing operations with hydrogen peroxide, using a magnetic pre-separation stage |
| 07/20/1989 | DE3812501A1 Process and apparatus for precipitating and recovering silver and mercury from spent, titrated solutions, which are strongly acid with sulphuric acid, for the determination of chemical oxygen demand |
| 07/19/1989 | CN1034023A Process for recovery of gold |
| 07/18/1989 | CA1257482A1 Metal recovery |
| 07/12/1989 | CN1033748A Recovery of noble metals |
| 07/05/1989 | EP0322661A2 Process for the recuperation of rhodium from aqueous solutions containing complex rhodium compounds |
| 06/27/1989 | US4842644 Silver recovery method |
| 05/23/1989 | US4832925 Leaching, oxidation, precipitation of impurities |
| 05/17/1989 | EP0316094A2 Separation process |
| 05/03/1989 | EP0314352A1 Recovery of noble metals |
| 04/27/1989 | DE3816697C1 Process for recovering rare metals |
| 04/18/1989 | US4822413 Using ferric sulfate generated by thiobacillus |
| 03/28/1989 | US4816235 Silver and manganese recovery using acidified thiourea |
| 03/28/1989 | US4816234 Utilization of oxygen in leaching and/or recovery procedures employing carbon |
| 03/21/1989 | US4814007 Solvent extraction, guanidine compound |
| 03/21/1989 | US4814003 To vaporize or melt metals |
| 03/08/1989 | EP0305418A1 Process for recovering platinum group metals. |
| 03/01/1989 | EP0305131A2 A process for the recovery of gold |
| 02/22/1989 | EP0304231A2 Method of separating metals from catalyst material |
| 02/07/1989 | US4802920 Sulfonating asphaltene extraction of metal, oxidation, recover ing gold and silver |
| 01/31/1989 | US4801329 Gold, silver, platinum group; oxidation; complex of iron, copper, vanadium or manganese as promoter |
| 01/24/1989 | US4799954 Recovery of silver from photographic film with high shear and caustic |
| 12/28/1988 | CN87102039A Antimony and gold smelting technology |
| 11/29/1988 | CA1245459A1 Sulfide as a hypochlorite kill agent |
| 11/22/1988 | US4786323 Process for the recovery of noble metals from ore-concentrates |
| 11/22/1988 | US4786318 Thickening of gold process slurries |
| 11/22/1988 | CA1245057A1 Gold recovery process |
| 11/22/1988 | CA1245056A1 Process for hydroformylation with rhodium catalysts and the separation of rhodium therefrom |
| 11/15/1988 | CA1244749A1 Method and composition for the recovery of precious metals from ores |
| 11/15/1988 | CA1244654A1 Method for recovering precious metals |
| 11/08/1988 | CA1244476A1 Extractants and method for the recovery of palladium |
| 10/18/1988 | US4778519 Recovery of precious metals from a thiourea leach |
| 09/27/1988 | US4774069 Palladium-ceramic catchment trap |
| 09/13/1988 | US4770700 Hydrometallurgical process for the separation and enrichment of gold, platinum, and palladium, together with recovery of selenium from the anode sludge of copper electrolysis |
| 08/30/1988 | CA1241271A1 Metal value recovery |
| 08/25/1988 | WO1988006193A1 Process and apparatus for recovering precious metal particles from soil materials |
| 08/25/1988 | WO1988006192A1 Process for recovering platinum group metals |
| 08/23/1988 | US4765827 Metal value recovery |
| 08/09/1988 | US4762597 Recovering gold, rotor cathode, anode housing |
| 08/09/1988 | US4762556 Absorption on diallylamine homo or copolymer |
| 08/03/1988 | EP0276215A1 Process for extracting precious metals from ore concentrates. |
| 07/19/1988 | US4758413 Reactive resins useful for precious metal recovery |
| 07/13/1988 | EP0274059A2 Process for the recycling of electrical batteries, assembled printed circuit boards and electronic components |
| 07/05/1988 | US4755453 Method for recovering silver from waste solutions containing thiosulfate compounds |
| 07/05/1988 | US4754953 Utilization of oxygen in leaching and/or recovery procedures employing carbon |
| 07/05/1988 | CA1238790A1 Recovery of silver from photographic films by high shear conditions |
| 07/05/1988 | CA1238789A1 Process for the extraction of platinum group metals |
| 06/21/1988 | US4752332 Treating manganese-containing ores with a metal sulfide |
| 06/16/1988 | WO1988004476A1 Process for the recycling of electrical batteries, assembled printed circuit boards and electronic components |
| 06/08/1988 | CN87105351A Heap leaching with oxygen |
| 05/31/1988 | CA1237283A1 Method for recovering precious metals from precious metal-bearing materials such as ore and tailings |
| 05/24/1988 | CA1236980A1 Process for the recovery of gold from a precious metal bearing sludge concentrate |
| 05/17/1988 | US4744825 Removal and recovery of silver from waste stream |
| 05/11/1988 | CN86106293A A method of extracting gold from gold-containing aqua regia |
| 05/04/1988 | EP0266337A1 Hydrometallurgical process for recovering silver from electrolytic copper refinery slimes and from similar raw materials |
| 05/04/1988 | EP0265940A2 Process for recovery of silver from spent, waste, acidic processing fluids |
| 05/04/1988 | EP0265736A2 Process for leaching noble metals from ores or their concentrates using cyanidic solutions with additions of hydrogen peroxide |
| 05/04/1988 | EP0265695A2 Recording apparatus |
| 05/03/1988 | CA1235908A1 Process for the isolation of noble metals |
| 05/03/1988 | CA1235907A1 Recovery of gold from refractory auriferous iron- containing sulphidic concentrates |
| 04/26/1988 | US4740244 Process for recovery of silver from spent, waste, acidic processing fluids |
| 04/26/1988 | US4740243 Metal value recovery from metal sulfide containing ores |
| 04/20/1988 | EP0263910A1 Hydrometallurgical process for separating and concentrating gold, platinum and palladium, as well as recovering selenium from electrolytic copper refinery slimes and similar non-metallic materials |
| 04/20/1988 | CN86102411B Method for extracting gold and silver directly from gold concentrates |
| 04/19/1988 | US4738718 Slurrying, oxidation of ore before leaching |
| 04/12/1988 | CA1234991A1 Recovery of gold from auriferous refractory iron- containing sulphidic ore |
| 03/29/1988 | US4734171 Reducing iodine to iodide while reducing and precipitating gold |
| 03/29/1988 | US4734129 Oxidizing lead to form lead oxide slag |
| 03/23/1988 | CN86106014A Utilization of oxygen in leaching and / or recovery procedures employing carbon |
| 03/22/1988 | CA1234291A1 Recovery of gold from auriferous refractory iron- containing sulphidic material |
| 03/22/1988 | CA1234290A1 Recovery of gold from refractory auriferous iron- containing sulphidic material |
| 03/22/1988 | CA1234289A1 Recovery of platinum group metals from nickel-copper- iron matte |
| 03/15/1988 | US4731114 Recovery of precious metals from refractory low-grade ores |
| 03/15/1988 | US4731113 Method for the recovery of precious metals from ores |
| 03/03/1988 | DE3711800C1 Process for separating off and purifying the platinum group metals by solvent extraction |
| 03/02/1988 | EP0257548A1 Process for the recovery of silver from zinc plant calcines and neutral or low acid leach residues with thiourea |
| 03/01/1988 | US4728400 Method and apparatus for extraction of amalgamatable metals from a slurry |
| 02/23/1988 | US4726939 Process for the removal of mercury from precious metal-cyanide liquors |
| 02/23/1988 | CA1233028A1 Process for recovering silver from sulfate solutions |
| 02/16/1988 | US4725313 Method of extracting a precious metal from an ore |
| 02/10/1988 | EP0255673A2 Process for the recovery of rhodium from aqueous solutions containing rhodium complex compounds |
| 02/09/1988 | US4723998 Recovery of gold from carbonaceous ores by simultaneous chlorine leach and ion exchange resin adsorption process |
| 02/03/1988 | EP0255389A1 Process for recovering metals |
| 02/02/1988 | US4722831 Leaching with hydrochloric acid, leaving gold in residues |
| 02/02/1988 | CA1232142A1 Leaching and washing a flocculated slurry having a fiber content |
| 02/02/1988 | CA1232139A1 Process for separately recovering gold and silver from solution by carbon adsorption |
| 01/28/1988 | EP0236456A4 Refining precious metals. |
| 01/26/1988 | US4721605 Selective removal of metals from aqueous solutions with dithiophosphinic acids |
| 01/26/1988 | US4721526 Heap leaching with oxygen |
| 01/20/1988 | EP0253783A1 Process for refining gold and apparatus employed therefor |