| Patents for C22B 11 - Obtaining noble metals (5,080) |
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| 04/26/2000 | CN1051809C Method of chemically and electrolyticaly recovering and extracting gold |
| 04/26/2000 | CN1051806C Selectively smelting tech. and apparatus for fine particle contamination type primary gold ore |
| 04/12/2000 | EP0991786A1 Separating metal ions absorbed on a resin and installation for recycling photographic effluents including an exchanger and an electrolysis vessel |
| 04/11/2000 | CA2045659C Air concentrator |
| 03/30/2000 | WO2000016904A1 Method of producing metal flakes |
| 03/28/2000 | US6043022 Apparatus and method for the generation and use of ferric ions |
| 03/28/2000 | US6042775 Silver reclamation system |
| 03/23/2000 | WO2000015856A1 A process for gold extraction |
| 03/21/2000 | US6039789 Removal of boron and fluoride from water |
| 03/21/2000 | CA2123382C Processing of compositions containing precious metals and other valuable elements for recovery purposes |
| 03/15/2000 | CN1247105A Process for comprehensive recovery of gold from iron ore |
| 03/14/2000 | US6036741 Process for producing high-purity ruthenium |
| 03/07/2000 | US6034985 Remelting method for recognition and recovery of noble metals and rare earths |
| 02/29/2000 | US6030048 In-situ chemical reactor for recovery of metals or purification of salts |
| 02/24/2000 | WO2000009915A1 Intertank screen sealing system |
| 02/24/2000 | WO2000009771A1 Liquid carton waste material recycling process and apparatus for recycling liquid carton waste material |
| 02/24/2000 | WO2000009770A1 Process and apparatus for recovering metal material from waste material |
| 02/24/2000 | CA2339851A1 Liquid carton waste material recycling process and apparatus for recycling liquid carton waste material |
| 02/23/2000 | EP0980442A1 In-situ chemical reactor for recovery of metals or purification of salts |
| 02/09/2000 | EP0742843B1 Material beneficiation process and use of a device for carrying out the process |
| 01/26/2000 | EP0865508B1 Treatment of waste products that contain organic substances |
| 01/25/2000 | CA1340885C Agglomerating agents for clay containing ores |
| 01/12/2000 | EP0970263A1 Electrolytic method for recovering and recycling silver from a nitric solution |
| 01/12/2000 | CN1048289C Method for integrated recovery of gold, silver, Pb and Sn as valuabele metals from chloride slag |
| 01/11/2000 | US6012658 Comminution porous sponge structure of metal; flattening |
| 01/05/2000 | EP0832306B1 Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulphide ores |
| 12/29/1999 | EP0966325A1 Method for enriching silver or other precious metals by flotation from a suspension, for example from zinc-leaching residues |
| 12/29/1999 | CN1047802C Material beneficiation process and device |
| 12/29/1999 | CN1047801C Method for extracting gold from refractory ore |
| 12/15/1999 | CN1238420A In-situ chemical reactor for recovery of metals or purification of salts |
| 12/09/1999 | WO1999063123A1 Heap leach agglomeration/percolation extraction aids for enhanced gold and silver recovery |
| 12/09/1999 | CA2332243A1 Heap leach agglomeration/percolation extraction aids for enhanced gold and silver recovery |
| 12/08/1999 | CN1237645A New type adjuvant for gold-extracting process by using wet synergistic oxidation, cyanidation and leaching-out method |
| 12/08/1999 | CN1237644A New process for refining high-purity gold by wet method |
| 12/01/1999 | CN1237223A Placer gold mining method, placer gold mining boat used in this method, placer gold digging and separating method and system therefor, and placer gold separating method and system therefor |
| 11/30/1999 | US5993635 Processing a sulphide mineral composition which at least partly comprises an iron-containing mineral. |
| 11/30/1999 | US5992640 Precious metals recovery from ores |
| 11/25/1999 | WO1999060178A1 Hydrometallurgical treatment process for extraction of platinum group metals obviating the matte smelting process |
| 11/16/1999 | US5985221 Method of recovering precious metals |
| 10/30/1999 | CA2270744A1 Method for removal of gold by liquid-liquid extraction from gold-cyanide complex in aqueous solution |
| 10/28/1999 | WO1999054515A1 Nozzle for low pressure flash tanks for ore slurry |
| 10/27/1999 | EP0951522A1 Method of removing reactive metal from a metal-coated reactor system |
| 10/27/1999 | CN1232879A Salt adding roast and cyanidation process to extract Au, Ag and Cu comprehensively for copper containing aurin ore |
| 10/26/1999 | US5972302 Method for the microwave induced oxidation of pyritic ores without the production of sulphur dioxide |
| 10/20/1999 | EP0950122A1 Method for microwave induced oxidation of sulphidic ore material in fluidized bed without sulphur dioxide emissions |
| 10/20/1999 | EP0871787B1 Electrochemical processing method for catalyst substrates containing noble metals for the recovery thereof |
| 10/20/1999 | CN1045796C Method for extraction of gold, silver and other noble metals from arsenic- and copper-bearing anode mud |
| 10/20/1999 | CN1045795C Method for recovering platinum and lead in anode mud from electrolytic hydrogen peroxide solution production |
| 10/20/1999 | CN1045794C Method for obtaining gold, silver and other noble metals from anode mud contg. high concn. arsenic and lead |
| 10/07/1999 | WO1999050465A1 Recovery of precious metals and copper from copper/gold ores using resin technology |
| 10/07/1999 | WO1999050187A1 Removal of boron and fluoride from water |
| 10/07/1999 | CA2326168A1 Recovery of precious metals and copper from copper/gold ores using resin technology |
| 10/05/1999 | US5961833 Gold ore is treated with an aqueous cyanide solution to produce a liquid product containing a gold-cyanide complex and a copper-cyanide complex. the liquid product is then delivered to a nanofiltration membrane allows passage of the gold |
| 09/28/1999 | US5958657 Regeneration of spent fixer solution |
| 09/23/1999 | WO1999047714A1 Apparatus and methods for recovering valuable metals |
| 09/22/1999 | CN1045191C Regeneration of cyanide from thiocyanate |
| 09/16/1999 | DE19810874A1 Verfahren zur Aufbereitung von Edel- und/oder Halbedelmetallen aus Leiterplatten Process for the preparation of precious and / or semi-precious metals from printed circuit boards |
| 09/15/1999 | EP0942070A1 Recovery of metal values from polyester circuit boards by treatment in alkaline solutions of higher alcohols |
| 09/15/1999 | EP0646185B1 Production of metals from minerals |
| 09/10/1999 | WO1999045159A1 Extraction of valuable metal by acid cyanide leach |
| 09/10/1999 | WO1999045158A1 Gold recovery process |
| 09/07/1999 | US5948375 Biological oxidation of sulphide minerals to recover gold, silver, platinum group metals and base metals |
| 09/07/1999 | US5948140 Complexing with sodium or potassium halides and calcium orbarium halides; reduction or electrodeposition |
| 09/07/1999 | CA2086384C Process for the recovery of noble metals and tertiary phosphines |
| 09/01/1999 | CN2335974Y Pretreatment device for extracting gold with high yield from gold concentrate contg high arsenic and high sulfur |
| 09/01/1999 | CN1227268A Gold-extracting cyanidation process decomposing primary gold ore in temperature controlling and oxygen admixing gas burning pyrolysis furnace |
| 09/01/1999 | CN1227187A Regeneration of cyanide by oxidation of thiocyanate |
| 08/25/1999 | CN1226605A Technology for gold extraction by cyanide process with mixed auxiliary |
| 08/25/1999 | CN1226604A Pretreating method for fine gold mineral containing multiple elements |
| 08/25/1999 | CN1044824C Method for extracting noble metals by using modified lime-sulfur mixture |
| 08/25/1999 | CN1044823C Process for activating and dissolving sulfide ores containing gold |
| 08/24/1999 | US5942098 Method of treatment of water and method and composition for recovery of precious metal |
| 08/24/1999 | US5942024 Solvent extracting from gold bearing chlorination leach solution with dibutyl carbitol, scrubbing with hydrochloric acid, centrifuging, filtering, reducing gold |
| 08/19/1999 | DE19805893A1 Precious metal especially gold recovery from slags and melting furnace residues |
| 08/18/1999 | EP0752013B1 Hydrometallurgical extraction process |
| 08/18/1999 | CN1044690C Process for recovery of group VIII noble metals |
| 08/17/1999 | US5939034 Complexing with the quanidyl or the quaternary amine extractants, stripping with aqueous stripping solution and demetallization |
| 07/27/1999 | US5927508 Method and apparatus for recovering fine gold from low grade ores |
| 07/22/1999 | WO1999036582A1 Method for microwave induced oxidation of sulphidic ores and ore concentrates without the production of sulphur dioxide gas |
| 07/21/1999 | EP0930373A1 Recovery of nickel and/or cobalt from a hydroxide concentrate with an ammonium leach solution |
| 07/14/1999 | CN1222582A Additive for cyaniding gold extraction from auriferous ore powder |
| 07/14/1999 | CN1222581A Preparation for cyaniding gold extraction from auriferous copper-zinc ore |
| 07/01/1999 | WO1999032675A1 A process for recovering zinc values as complex zinc cyanide solution and use of the same for stripping copper from loaded anion exchange material |
| 06/29/1999 | US5916534 Solubilizing base metal in slurry by adding solubilizing agents |
| 06/24/1999 | WO1999031286A1 Methods for treating ores |
| 06/24/1999 | CA2315163A1 Methods for treating ores |
| 06/24/1999 | CA2225980A1 Process for removing the refractory character of ashes containing coinage metals |
| 06/23/1999 | EP0924307A1 Solvent extraction of cobalt and nickel values from a magnesium containing solution |
| 06/19/1999 | CA2225370A1 A process for recovering zinc values |
| 06/10/1999 | WO1999028286A1 Process to separate rhodium from an organic mixture |
| 06/10/1999 | CA2312328A1 Process to separate rhodium from an organic mixture |
| 06/02/1999 | EP0919534A1 Process to separate rhodium from an organic mixture |
| 05/11/1999 | US5902474 Chloride assisted hydrometallurgical extraction of metal |
| 05/06/1999 | WO1999022036A1 Method for opening up materials containing noble metals by chloridization with uv radiation |
| 05/05/1999 | CN1043247C Recovery of noble metal |
| 05/04/1999 | US5900041 Ion exchanging |
| 04/28/1999 | CN2316322Y Machine for producing gold from gulch-gold |
| 04/27/1999 | US5896997 Dynamic mining system comprising hydrated multiple recovery sites and related methods |
| 04/14/1999 | CN1042957C Method for extracting silver and gold in difficult infusion independent silver mine by flotating silver concentrate ore |
| 04/07/1999 | EP0906962A1 Interseparation of platinum group metals |