| Patents for C22B 11 - Obtaining noble metals (5,080) |
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| 10/21/1995 | CA2147307A1 Noble metal recovery |
| 10/18/1995 | CN1030088C Method for extracting gold from cyanated extract or cyanated ore pulp of vein gold deposit or gold concentrate |
| 10/17/1995 | US5458866 Process for preferentially oxidizing sulfides in gold-bearing refractory ores |
| 10/12/1995 | WO1995027085A1 Solvent extraction process |
| 10/12/1995 | CA2181722A1 Solvent extraction process |
| 10/05/1995 | WO1995026418A1 Hydrometallurgical extraction process |
| 09/28/1995 | DE4417495C1 Prodn. of pure platinum materials reinforced with yttrium oxide |
| 09/27/1995 | EP0652979A4 Inorganic perbromide compositions and methods of use thereof. |
| 09/20/1995 | CN1029792C Technology for extracting gold by using emulsion film method and recovering sodium cyanide |
| 09/12/1995 | US5449397 Biocatalyzed leaching of precious metal values |
| 09/12/1995 | US5449396 Method for recovering gold and silver from ore starting materials |
| 09/05/1995 | CA1336862C Recovery of silver values from chlorides including silver chloride |
| 08/29/1995 | CA2012971C Recovery of metal values from ores |
| 08/22/1995 | US5443621 Improved leaching |
| 08/22/1995 | CA1336748C Reactive resins useful for precious metal recovery |
| 08/08/1995 | US5439503 Mixing iron bearing ore with flux and copper, heating at high temperature to form a molten slag and molten mass containing copper, silver, gold and iron metals, settling in two layers discarding slag and leaching molten mass, electrolysis |
| 08/08/1995 | CA2063644C Process for the recovery of rhodium from the residues of the distillation of products of the oxo synthesis |
| 08/01/1995 | US5437792 Process of recovering silver from photographic solutions |
| 07/20/1995 | DE4400796A1 Recovery of precious metals from non-oxidised (semi-) refractory ores |
| 07/13/1995 | WO1995018870A1 Method of recovering platinum metals and an apparatus therefor |
| 07/11/1995 | US5431717 Method for rendering refractory sulfide ores more susceptible to biooxidation |
| 07/05/1995 | CN1029242C Smelting process for Sb-Au ores with low content of ferrous sulfide |
| 06/28/1995 | CN1104266A Technology for extracting gold by directly electrolysing noble liquid cyanide |
| 06/27/1995 | US5427606 Stripping cyano-base metal complexes leaving adsorbed cyano-noble metal complexes |
| 06/27/1995 | CA1336043C Method for the interseparation of noble metals |
| 06/21/1995 | EP0658215A1 Extraction or recovery of metal values |
| 06/20/1995 | US5425800 Recovery of precious metal values from refractory ores |
| 06/20/1995 | US5425799 Process for roasting refractory gold ores |
| 06/14/1995 | CN1103669A Method of rocoverying gold silver and orpiment from refractory gold ore containing arsenic |
| 06/14/1995 | CN1028881C Coal-oil coalescence agglomerative gold and its intergrowth method |
| 06/08/1995 | WO1995015403A1 Biooxidation of refractory sulfide ores |
| 06/08/1995 | DE4340884A1 Process for continually exchanging cations and anions in washing water |
| 05/23/1995 | US5417942 Process for trapping gaseous ruthenium on polyvinyl pyridine, more particularly usable for recovering radioactive ruthenium from irradiated nuclear fuels |
| 05/17/1995 | EP0652979A1 Inorganic perbromide compositions and methods of use thereof |
| 05/04/1995 | WO1995012001A1 Recovery of precious metal values from refractory ores |
| 05/03/1995 | EP0651064A1 A device and process for the pretreatement of electronic scrap |
| 05/03/1995 | EP0651063A1 Improvements in or relating to the recovery of silver |
| 05/02/1995 | US5411575 Treatment of ores for copper and gold with cyanide |
| 05/02/1995 | US5411573 Recovery of precious metals from acid solutions by N-containing electroactive polymers |
| 04/29/1995 | CA2134585A1 Recovery of silver |
| 04/27/1995 | WO1995011319A1 Gold lixiviation using nitrogen and sulfur heterocyclic aromatic compounds |
| 04/26/1995 | CN1101948A Method for raising cyaniding extraction rate and recovery percent of carbonaceous gold ore by compound inhibitor |
| 04/20/1995 | WO1995010636A1 Recovery of palladium catalyst |
| 04/19/1995 | EP0648848A1 Process for the recovery of platinum group metals from exhaust gas catalysts for motor vehicles |
| 04/11/1995 | US5405430 Leaching with sodium thiosulfate solution; precipitation |
| 04/05/1995 | EP0646185A1 Production of metals from minerals |
| 04/04/1995 | US5403380 Method for producing easily volatile metals, such as zinc, lead, mercury and cadmium, of sulfidic raw materials |
| 03/30/1995 | WO1995008651A1 Process for the elution of precious metals adsorbed on active carbon |
| 03/28/1995 | US5401296 Precious metal extraction process |
| 03/28/1995 | US5401005 Silver recovery cell |
| 03/14/1995 | US5397380 Recovery of metal values |
| 03/02/1995 | WO1995006141A1 Methods for assaying and recovering precious metals |
| 02/28/1995 | US5393322 Process for recovering noble metals from solutions deriving from the treatment of nuclear fuels |
| 02/22/1995 | CN1099071A Recovery of precious metal values from pefractory ores |
| 02/15/1995 | EP0565518B1 Photographic fixer regeneration |
| 02/14/1995 | US5389124 Heating in solvent; cooling to precipitate |
| 02/09/1995 | WO1995004164A1 Hydrometallurgical process for the recovery of precious metal values from precious metal ores with thiosulfate lixiviant |
| 02/08/1995 | EP0637635A2 Metal leaching and recovery process |
| 02/01/1995 | CN1098142A Hydrometallurgical process for the recovery of precious metal values from precious metal ores with thiosulfate lixiviant |
| 01/18/1995 | EP0634221A1 Process for the recovery of silver from zinc leaching residues by flotation |
| 01/14/1995 | CA2127839A1 Process for the recovery of silver by flotation from the residue from the wet extraction of zinc |
| 01/09/1995 | CA2126899A1 Metal leaching and recovery process |
| 01/03/1995 | US5378437 Processes to recover and reconcentrate gold from its ores |
| 12/28/1994 | EP0630418A1 Recovery of precious metal |
| 12/27/1994 | US5375720 Dry separation of particulate material of different densities |
| 12/21/1994 | EP0629712A1 A process for treating compositions containing noble metals and, optionally, other valuable elements in order to recover said valuables |
| 12/15/1994 | DE4331948C1 Process for recovering platinum metals from motor vehicle exhaust catalysts |
| 12/13/1994 | US5372631 Increasing silver recovery |
| 12/07/1994 | CN1096057A Quick-cyaniding gold-extracting method in autoclave |
| 11/29/1994 | US5368541 Method of extraction of mercury and gold from mine tailings |
| 11/23/1994 | CN1095422A Gold-silver wet seperation technology with gold |
| 11/22/1994 | CA1333199C Process for the recovery of silver from the pb/ag cake |
| 11/15/1994 | US5364822 Process for the recovery of group VIII noble metals |
| 11/15/1994 | US5364453 Method for recovering gold and other precious metals from carbonaceous ores |
| 11/15/1994 | US5364445 Recovery method of rhodium |
| 11/15/1994 | US5364444 Metal leaching and recovery process |
| 11/15/1994 | CA1333107C Process for the detoxification of effluents from ore processing operations with hydrogen peroxide, using a magnetic pre-separation stage |
| 11/10/1994 | WO1994025633A1 Method of dissolving and recovering metal |
| 11/09/1994 | EP0623685A1 Purification of molten aluminum using upper and lower impellers |
| 11/06/1994 | CA2122421A1 Purification of molten aluminum using upper and lower impellers |
| 11/02/1994 | EP0658215A4 Extraction or recovery of metal values. |
| 11/02/1994 | EP0622467A1 Process for roasting refractory gold ores |
| 10/31/1994 | CA2121542A1 Process of roasting refractory gold ores |
| 10/25/1994 | US5358699 Isolation of gold, silver and/or platinum by oxidation using lignins or tannins containing ortho-quinones or catechol as oxidation promoters before treatment with other chemicals |
| 10/19/1994 | CN1026215C Technology for preparation of magnetic active carbon |
| 10/11/1994 | US5354359 Hydrometallurgical process for the recovery of precious metal values from precious metal ores with thiosulfate lixiviant |
| 09/29/1994 | WO1994021345A1 Removing toxic metals from solutions |
| 09/29/1994 | CA2157923A1 Process for the removal of toxic cyanide and heavy metal species from alkaline solutions |
| 09/27/1994 | CA1332110C Procedure for leaching precious metals using a cyanide-containing leaching solution and hydrogen peroxide |
| 09/21/1994 | CN1092473A Purifying method for jewelry gold |
| 09/20/1994 | US5348712 Use of carbonates in metal ion extraction |
| 09/14/1994 | EP0557274B1 Recovery of palladium |
| 09/14/1994 | CN1092111A New process for extracting copper from underground water of copper mine |
| 09/07/1994 | EP0476078B1 Extraction and recovery of gold |
| 09/06/1994 | US5344625 Lignin or tannin derivatives |
| 09/06/1994 | CA2001173C Relating to the recovery of silver |
| 09/01/1994 | WO1994019500A1 Recovery of zinc values from a solution containing hydrocyanic acid |
| 08/31/1994 | EP0612853A1 Method for recovering metals from used exhaust gas catalysts |
| 08/30/1994 | US5342526 Solvent extraction using dialkylthietane |
| 08/30/1994 | US5342429 Purification of molten aluminum using upper and lower impellers |