| Patents for C22B 11 - Obtaining noble metals (5,080) |
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| 12/18/2001 | US6331200 From noble metal solutions containing nitrate, gold ions are reduced to gold by the addition of an acid fe.sup.2+ solution, the concentration of h.sup.+ in the fe.sup.2+ |
| 12/05/2001 | EP0991786B1 Separating metal ions absorbed on a resin and installation for recycling photographic effluents including an exchanger and an electrolysis vessel |
| 12/05/2001 | CN1325460A Liquid carton waste material recycling process and apparatus for recycling liquid carton waste material |
| 12/05/2001 | CN1075839C Treatment method for reusable cyanide gold-leaching lean solution |
| 11/22/2001 | WO2001088212A2 Method for thiosulfate leaching of precious metal-containing materials |
| 11/22/2001 | WO2001088211A2 Method for the treatment of work pieces with a palladium colloid solution |
| 11/22/2001 | CA2756715A1 Method for thiosulfate leaching of precious metal-containing materials |
| 11/22/2001 | CA2745928A1 Method for thiosulfate leaching of precious metal-containing materials |
| 11/22/2001 | CA2745806A1 Method for thiosulfate leaching of precious metal-containing materials |
| 11/22/2001 | CA2698578A1 Method for thiosulfate leaching of precious metal-containing materials |
| 11/22/2001 | CA2404620A1 Method for the treatment of work pieces with a palladium colloid solution |
| 11/15/2001 | US20010039854 Adding at least one peroxy oxidant, the oxidant oxidizes the sulphite contained in the gold sulfite complex to sulfate and reduces the gold contained in the complex to its metallic form |
| 11/15/2001 | DE10023373A1 Heat treatment apparatus used for pyrolyzing electronic scrap comprises a container as a vacuum chamber with a suction device arranged in the upper region and immersed in a crucible containing a liquid heat carrier |
| 11/13/2001 | US6315812 Subjecting host material to an oxidative pressure sulfuric acid leach process in the presence of a chloride salt, and at 210-230 degrees c.; solution has an acid strength of at least 1 g/l, to form a precious metal-bearing chloride complex |
| 11/13/2001 | US6315811 Method for producing platinum |
| 11/08/2001 | WO2001083835A2 Gold recovery process with hydrochloric acid lixiviant |
| 11/08/2001 | WO2001083834A1 Precious metal recovery from organics-precious metal compositions with supercritical water reactant |
| 10/31/2001 | EP1149927A1 Method and equipment for the processing of a gold bath |
| 10/24/2001 | CN1073463C Quick dissolving method for pure platinum or platinum alloy and use |
| 10/24/2001 | CA2344129A1 Assaying and/or recovering precious metals |
| 10/18/2001 | WO2001077011A1 Metal bearing membranes |
| 10/18/2001 | US20010031313 Method for removing reactive metal from a reactor |
| 10/18/2001 | CA2403164A1 Metal bearing membranes |
| 10/17/2001 | EP1144699A1 Method for extracting anions of ivb to viii metals using alkyl-substituted 1,3-diaminopropanes |
| 10/09/2001 | US6300402 Compositions created by the separation and isolation of the metallic and non-metallic constituent components of printed wiring assemblies and printed wiring boards |
| 10/04/2001 | US20010025548 Forming adduct of rhodium chloride and metal halide; carbonylation to rhodium halogen carbonyl; oxidation to hydrate; reduction to rhodium sponge |
| 10/04/2001 | EP1138791A1 Process for the recovery and refining of rhodium |
| 10/02/2001 | US6296773 Removal of boron and fluoride from water |
| 10/02/2001 | CA2021292C Recovery of precious metals |
| 09/25/2001 | US6294028 For reducing the risk of environmental contamination by mercury and mercury salts used during removal of gold ballbonds from the pads of a semiconductor device |
| 09/21/2001 | CA2301482A1 An aluminothermic method for the assay and recovery of metals and precious metals from ores and their concentrates |
| 09/20/2001 | DE10024239C1 Process for galvanically treating workpieces used e.g. in the production of circuit boards comprises contacting the workpieces with a palladium colloidal solution, and recovering the solution after use |
| 09/18/2001 | US6290747 Conversion of impure silver halide to ultra-pure silver metal |
| 09/13/2001 | WO2001066811A1 Methods for reducing cyanide consumption in precious metals extraction from sulfur bearing ores |
| 09/13/2001 | US20010021361 Heating; adding chlorate; forming ruthenium tetraoxide |
| 09/13/2001 | DE10005084C1 Recovery of rhodium from rhodium complexes, for reuse as a hydroformylation catalyst, comprises extraction with a phosphate or phosphonate, oxidization and treatment with an arylphosphine. |
| 09/12/2001 | CN1312393A Conversion of non-pure silver halide into super-pure metal silver |
| 08/30/2001 | WO2001062993A1 Process and apparatus for recovery of cyanide and metals |
| 08/30/2001 | CA2400806A1 Process and apparatus for recovery of cyanide and metals |
| 08/28/2001 | CA2197285C Method of platinum recovery |
| 08/23/2001 | US20010015113 Used in recording, acoustic or image transmission applications, which contains sulfur, iron, copper, palladium, gold and lead |
| 08/22/2001 | CN2443971Y Apparatus of working up positive mud for electrolysing gold |
| 08/16/2001 | EP1123740A1 Process for grinding noble metals in liquid medium |
| 08/14/2001 | CA2071626C Activation of a mineral species |
| 08/09/2001 | WO2001056932A1 Method for recovering rhodium from reaction products of oxosynthesis |
| 08/08/2001 | EP1122323A1 Method for recovering platinum from platinum-containing coatings on gas turbine engine components |
| 08/08/2001 | EP1019551B1 Separation of platinum group metals |
| 08/08/2001 | CN1069348C Wet-metallurgical non-cyanogen process and its special equiopment |
| 08/07/2001 | US6270555 Process for treating precious metal ores |
| 08/02/2001 | WO2001055462A1 Process for refining silver bullion with gold separation |
| 08/01/2001 | EP1119646A1 Liquid carton waste material recycling process and apparatus for recycling liquid carton waste material |
| 08/01/2001 | EP1119645A1 Process and apparatus for recovering metal material from waste material |
| 08/01/2001 | CN1306190A Direct-combustion hot air cupola furnace |
| 07/24/2001 | US6264847 Decomposing free cyanide ion and metallic cyano complex ions in a liquid by contacting with ozone gas in alkaline ph |
| 07/24/2001 | US6264039 Method for precious metal recovery from slag |
| 07/19/2001 | US20010008617 Using sulfuric acid |
| 07/18/2001 | CA2296827A1 Process for eluting precious metals from activated carbon |
| 07/12/2001 | WO2001049889A1 Process for treating precious metal ores |
| 07/11/2001 | EP1114796A1 Process for the winning of osmium and ruthenium from precious metal concentrates |
| 07/11/2001 | EP1114795A1 Process for the separation of ruthenium from precious metal solutions |
| 07/11/2001 | CN1302911A Process for extracting gold (silver) from gold (silver) ore by cyanation |
| 07/10/2001 | CA1341274C Polymeric ore agglomeration aids |
| 07/05/2001 | US20010006612 Concentrate, by treating with nitric acid, then heating the suspension, collecting osmium tetroxide in a hydroxide absorption solution, and alkalinizing the remaining suspension, then finally oxidative extraction of ruthenium |
| 07/04/2001 | EP1112389A1 Process for recovery of gold and/or silver |
| 07/03/2001 | USRE37251 Pressure oxidation of an ore or concentrate in the presence of oxygen and an acidic solution containing halogen ions and a source of bisulfate or sulfate ions to extract non-cuprous metals |
| 06/14/2001 | WO2001042531A1 Dense refractory material for use at high temperatures |
| 06/14/2001 | WO2001042519A1 Recovery of precious metals |
| 06/14/2001 | WO2001042168A1 Aluminium-wettable protective coatings for carbon components used in metallurgical processes |
| 06/14/2001 | CA2393769A1 Recovery of precious metals |
| 06/14/2001 | CA2393491A1 Aluminium-wettable protective coatings for carbon components used in metallurgical processes |
| 06/14/2001 | CA2393351A1 Dense refractory material for use at high temperatures |
| 06/06/2001 | CA2327602A1 Method for the regeneration of sorbent materials |
| 05/31/2001 | WO2001018262A3 Bioleaching of sulphide minerals |
| 05/23/2001 | EP1101829A1 The recovery of gold from refractory ores and concentrates of such ores by cyanide leaching |
| 05/22/2001 | US6235093 Solutions of water and noble metals for reduction |
| 05/22/2001 | US6234318 Flotation and cyanidation process control |
| 05/16/2001 | CN1295136A Gold adsorbing agent |
| 05/15/2001 | US6231637 Process for producing high-purity silver materials |
| 05/10/2001 | US20010001065 Method of biotreatment for solid materials in a nonstirred surface bioreactor |
| 05/08/2001 | US6228334 Method of recovering gold from the fine carbon residue from a coarse carbon gold recovery process |
| 05/03/2001 | DE10000275C1 Process for removing ruthenium from precious metal solutions comprises adding chlorate to a ruthenium-containing solution and feeding a carrier gas through the suspension/solution to collect the ruthenium tetroxide produced |
| 05/03/2001 | DE10000274C1 Process for recovering osmium and ruthenium from precious metal concentrates comprises collecting osmium tetroxide in an absorption solution and leaching out ruthenium with an agent |
| 04/26/2001 | WO2001029275A1 Recovery of precious metals from coal burning slag by multiple crushing/suspension stages |
| 04/25/2001 | EP0840808B1 Method of purifying gold |
| 04/25/2001 | EP0832303B1 Chloride assisted hydrometallurgical extraction of metal |
| 04/05/2001 | WO2001023067A1 Polyamide-containing ligands covalently bonded to supports, polyamide-containing resins, and methods for removing metals from solutions |
| 04/05/2001 | CA2384631A1 Polyamide-containing ligands covalently bonded to supports, polyamide-containing resins, and methods for removing metals from solutions |
| 04/03/2001 | US6210648 Using an oxygen-deficient flotation gas. |
| 03/28/2001 | EP1055009A4 Methods for treating ores |
| 03/28/2001 | CN1288965A Preparation of high-purity osmium powder |
| 03/21/2001 | EP1084280A1 Hydrometallurgical treatment process for extraction of platinum group metals obviating the matte smelting process |
| 03/15/2001 | WO2001018602A1 Method to extract silver from a photographic developer |
| 03/15/2001 | WO2001018269A1 Recovery of copper from copper bearing sulphide minerals by bioleaching with controlled oxygen feed |
| 03/15/2001 | WO2001018268A1 Recovery of nickel from nickel bearing sulphide minerals by bioleaching |
| 03/15/2001 | WO2001018267A1 Recovery of precious metal from sulphide minerals by bioleaching |
| 03/15/2001 | WO2001018266A1 Recovery of zinc from zinc bearing sulphide minerals by bioleaching and electrowinning |
| 03/15/2001 | WO2001018263A1 Method and apparatus for achieving enhanced oxygen mass transfer in slurry systems |
| 03/15/2001 | WO2001018262A2 Bioleaching of sulphide minerals |
| 03/13/2001 | US6200545 Cyanide recovery by solvent extraction |
| 03/13/2001 | US6200364 Process for eluting precious metals from activated carbon |