| Patents for C22B 11 - Obtaining noble metals (5,080) |
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| 01/14/1988 | DE3641136C1 Metallurgical vessel |
| 12/31/1987 | CN87206544U Auxiliary device for rapid gold-extraction using percolating cyanidation |
| 12/15/1987 | US4713110 Reducing salts with magnesium and catalyst |
| 12/09/1987 | EP0248518A1 Separation of nickel from copper in autoclave |
| 11/24/1987 | CA1229487A1 Process for the recovery of silver from a residue essentially free of elemental sulphur |
| 11/11/1987 | EP0244921A2 Method for recovering platinum in a nitric acid plant |
| 11/11/1987 | EP0244433A1 Method for separation and recovery of metals from mixtures of metal sulfides such as lead ores |
| 11/10/1987 | CA1228989A1 Recovery of precious metals from materials containing same |
| 10/27/1987 | CA1228483A1 Process for the pressure oxidation acid leaching of non-ferrous metal and iron-containing sulphidic material |
| 10/22/1987 | WO1987006271A1 Leaching and adsorption of a precious metal |
| 10/21/1987 | CN86106560A Separating and recovery method of leftover bits and pieces of silver and copper bimetal |
| 10/06/1987 | US4698425 Chelating agents |
| 09/30/1987 | EP0239227A1 Fluidised bed process for the recovery of finely divided metals |
| 09/30/1987 | EP0192651A4 1,3 disubstituted aromatic cyclohexane imides and method of use thereof as chelating agents. |
| 09/22/1987 | US4695317 Reducing agent |
| 09/22/1987 | CA1227041A1 Method for recovering metal values from materials containing copper and/or precious metals |
| 09/16/1987 | EP0236456A1 Refining precious metals |
| 09/02/1987 | EP0233918A1 Process for metal recovery and compositions useful therein |
| 09/02/1987 | CN87100396A Catalyst recovery process |
| 09/02/1987 | CN86107005A Method of recovering noble metals from concentrated mineral |
| 08/27/1987 | WO1987005052A1 Fluidised bed process for the recovery of finely divided metals |
| 08/18/1987 | US4687559 Extraction using alkali cyanide and carbonate solution |
| 08/18/1987 | US4687514 Process for the recovery of noble metals from solutions |
| 08/12/1987 | EP0231309A1 Process for manufacturing electrically conductive polythiophene. |
| 08/11/1987 | US4685963 Process for the extraction of platinum group metals |
| 08/11/1987 | CA1225241A1 Process of recovering copper and of optionally recovering silver and gold by a leaching of oxide- and sulfide-containing materials with water-soluble cyanides |
| 08/05/1987 | EP0230906A2 Process for the recovery of iodine and noble metal catalyst |
| 08/05/1987 | CN86102510A Metal recovery cell |
| 08/04/1987 | US4684404 Extraction of gold from ores |
| 08/04/1987 | CA1224927A2 Recovering metals from spent hydroprocessing catalysts |
| 08/04/1987 | CA1224926A1 Method for working-up complex sulphidic ore concentrates |
| 07/21/1987 | US4681628 Gold cyanide ion; thiourea; complexing; silver, copper, mercury |
| 07/14/1987 | US4680168 Extraction of Group 8 metals from organic solutions |
| 06/30/1987 | US4676909 Process for recovering noble metals from their cyanide complexes |
| 06/23/1987 | CA1223185A1 Dissolution of noble metals |
| 06/18/1987 | WO1987003623A1 An electrolytic process for the simultaneous deposition of gold and replenishment of elemental iodine |
| 06/16/1987 | US4673492 Gaseous effluent of said mixture and bring in contact with baffles; dentistry; efficient |
| 06/09/1987 | US4671868 Method for recovering gold, platinum or silver from an ore containing gold dust, platinum dust or silver dust |
| 06/09/1987 | CA1222716A1 Pyrolysis reaction apparatus and method |
| 06/03/1987 | EP0224239A2 Process for preparing finely divided metal powders |
| 06/02/1987 | US4670052 Process for the recovery of gold from a precious metal bearing sludge concentrate |
| 06/02/1987 | CA1222380A1 Method for processing copper smelting materials and the like containing high percentages of arsenic and/or antimony |
| 05/27/1987 | CN86105464A Recovery of noble metal values from carbonylation residues using immiscible liquids |
| 05/26/1987 | US4668368 Method and apparatus for extraction of amalgamatable metals from a slurry |
| 05/26/1987 | US4668289 Method for reclaiming gold |
| 05/19/1987 | US4666514 Hydrometallurgical process for recovering silver from copper-electrolysis anode sludge |
| 05/19/1987 | US4666212 Metal value recovery |
| 05/19/1987 | CA1221842A1 Treatment of ores |
| 05/13/1987 | EP0221136A1 Catalyst recovery process. |
| 05/13/1987 | CN86106820A Purifying method |
| 05/06/1987 | EP0220811A1 Process and apparatus for removing precious metals from solutions |
| 05/06/1987 | EP0220198A1 Preparing metal compounds by pyrolysis. |
| 05/06/1987 | CN85107774A Recovery of gold from refractory auriferous iron-containing sulphidic concentrate |
| 05/05/1987 | US4662938 Recovery of silver and gold |
| 04/21/1987 | CA1220629A1 Compact precious metal furnace and recovery method |
| 04/15/1987 | CN86101940A Gold recovered by the method of floatation and absorption |
| 04/15/1987 | CN85107626A Process for the pressure oxidation of acid leaching of non-ferrous metal and iron-containing sulphide |
| 04/14/1987 | CA1220345A1 Process for the recovery of noble metals from ores |
| 04/09/1987 | WO1987002068A1 Method for separation and recovery of metals from mixtures of metal sulfides such as lead ores |
| 04/01/1987 | EP0216493A1 Platinum recovery using perforation resistant gauzes |
| 03/31/1987 | US4654079 Process for improving the extraction yield of silver and gold in refractory ores |
| 03/31/1987 | US4654078 Ball milling, iron, extraction, cementation |
| 03/26/1987 | WO1987001733A1 Process for extracting precious metals from ore concentrates |
| 03/26/1987 | WO1987001732A1 Refining precious metals |
| 03/17/1987 | US4650649 Catalyst recovery process |
| 03/17/1987 | CA1219132A1 Hydrometallurgical arsenopyrite process |
| 03/12/1987 | WO1987001366A1 Process for purifying silver refinery slimes |
| 03/10/1987 | CA1218961A1 Mineral separation |
| 03/04/1987 | EP0212982A2 Recovery of rhodium from carbonylation residues using immiscible liquids |
| 03/04/1987 | EP0212453A1 Process for the recovery of gold from a precious metal bearing sludge concentrate |
| 03/03/1987 | US4647307 Process for recovering gold and silver from refractory ores |
| 03/03/1987 | CA1218530A1 Treatment of anode slimes in a top blown rotary converter |
| 02/26/1987 | WO1987001139A1 Process for metal recovery and compositions useful therein |
| 02/24/1987 | US4645535 Method for the recovery of precious metals from ores |
| 02/04/1987 | EP0210387A1 Selective removal of metals from aqueous solutions with dithiophosphinic acids |
| 02/03/1987 | US4640710 Process for recovering silver from sulfate solutions |
| 01/29/1987 | WO1987000677A1 Electrically conductive polythiophene and procedure for its manufacturing, and its use |
| 01/20/1987 | US4637865 Process for metal recovery and compositions useful therein |
| 01/14/1987 | EP0061468B1 Recovery of silver from ores and concentrates |
| 01/14/1987 | EP0040243B1 Process and apparatus for producing metals at porous hydrophobic catalytic barriers |
| 01/13/1987 | CA1216618A1 Plasma arc furnaces |
| 01/07/1987 | EP0207694A2 Process for the manufacture of nitric oxide |
| 01/07/1987 | EP0207656A1 Recovery of metals from their alloys with lead |
| 12/30/1986 | US4632701 Process for the recovery of silver from a residue essentially free of elemental sulphur |
| 12/30/1986 | EP0206377A2 Extraction of transition metals from organic solutions |
| 12/30/1986 | CA1215843A1 Leaching refractory gold ores |
| 12/23/1986 | CA1215546A1 Process for recovering noble metals belonging to group viii of the periodic system of the elements from a contaminated catalyst solution originating from the carbonylation of methyl acetate and/or dimethylether |
| 12/16/1986 | US4629502 Pressurized reaction of refractory ores with heat recovery |
| 12/09/1986 | CA1214943A1 Recovery of metal values from a pulp containing such values in dissolved form |
| 12/02/1986 | US4626279 Decomposition at low temperatures in the presence of oxygen |
| 11/25/1986 | CA1214435A1 Ore beneficiation |
| 11/25/1986 | CA1214430A1 Gold recovery in fractionating column containing particulate absorbent using organic liquid |
| 11/25/1986 | CA1214334A1 Method for the recovery of silver from waste photographic fixer solutions |
| 11/20/1986 | WO1986006750A1 Catalyst recovery process |
| 11/18/1986 | US4623522 Complexing |
| 11/06/1986 | WO1986006361A1 Preparing metal compounds, alloys and metals by pyrolysis |
| 10/28/1986 | CA1213150A1 Recovery of precious metals |
| 10/14/1986 | CA1212550A1 Recovering gold and silver from an aqueous solution containing cyanic compounds of gold and silver |
| 10/07/1986 | US4615731 Hydrometallurgical processing of precious metal-containing materials |
| 10/07/1986 | CA1212242A1 Recovery of zinc from zinc-containing sulphidic material |