| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 08/29/2002 | WO2002066708A1 Method for electrolytic production of ultra-pure zinc or zinc compounds from zinc primary and secondary raw materials |
| 08/29/2002 | WO2002066691A2 Sieve tray column and process for recovery of metal value |
| 08/29/2002 | WO2002066690A2 Method of purification of a redox mediator solution before electrolytic regeneration thereof |
| 08/29/2002 | WO2002066689A1 Adaptation of bacteria for leaching |
| 08/29/2002 | WO2002016262A3 Slurry treatment |
| 08/29/2002 | WO2001091873A3 Polysulfonamide matrices |
| 08/29/2002 | US20020119085 Process for recovering palladium from a solution |
| 08/29/2002 | US20020117025 High purity cobalt, method of manufacturing thereof, and high purity cobalt targets |
| 08/29/2002 | US20020117022 Converting trivalent iron ions and impurity divalent copper ions in aqueous solution of iron chloride to divalent iron ions and monovalent copper ions using hydrochloric acid, separating monovalent copper ions using ion exchange resins |
| 08/29/2002 | CA2439220A1 Apparatus and process for recovery of metal values |
| 08/28/2002 | EP1234062A2 Recovery of metals from ore by bioleaching with sulfur addition |
| 08/28/2002 | EP0762918B1 Fluid extraction of metals and/or metalloids |
| 08/28/2002 | CN1365948A Process for preparing industrial beryllium oxide by sulfuric acid method |
| 08/27/2002 | US6440377 Neutralization of the waste acid with a calcium compound subject to precipitation; production of gypsum and also of an iron oxide pigment |
| 08/27/2002 | US6440376 Method for dissolving noble metals out of segregated ores containing noble metals |
| 08/27/2002 | US6440194 Recovery of precious metals from metal alloys produced aluminothermically from base metal smelter slag |
| 08/27/2002 | CA2204842C Method for producing high grade reduced silver |
| 08/22/2002 | US20020114748 Recycling of spent pot linings |
| 08/22/2002 | US20020112968 Production of high purity vanadium compound from vanadium-containing carbonaceous residues |
| 08/22/2002 | US20020112569 Grinding precious-metal-containing solids, leaching with hydrochloric acid and oxidizing agent, decanting, filtering, precipitating base metals, filtering, precipitating precious metals with reducing agent |
| 08/21/2002 | EP1232290A1 Method for leaching nickeliferous oxide ores of high and low magnesium laterites |
| 08/21/2002 | EP0963450B1 Leached nanocrystalline materials, method for making them and uses in the energetic sector |
| 08/21/2002 | CN1365397A Apparatus for heating flowing material containing solids |
| 08/20/2002 | US6436358 Metals removal from spent salts |
| 08/20/2002 | US6435249 Method of recycling disk recording medium and apparatus for recovering metal reflective film |
| 08/15/2002 | WO2002008125A3 Method for recovering copper from sulfide ore materials using high temperature pressure leaching, solvent extraction and electrowinning |
| 08/14/2002 | EP1231285A1 Process and equipment for the separation of gold particles |
| 08/14/2002 | EP1230406A2 Solvent extraction process for the recovery of valuable metals from acidic leachates |
| 08/14/2002 | EP1229977A1 Polyamide-containing ligands covalently bonded to supports, polyamide-containing resins, and methods for removing metals from solutions |
| 08/13/2002 | US6432370 An apparatus for receiving a dispersion of a liquid-liquid extraction, the apparatus comprising vessels |
| 08/13/2002 | US6432167 Processes for the recovery of copper from aqueous solutions containing nitrate ions |
| 08/13/2002 | US6432166 Dust control |
| 08/08/2002 | WO2002061157A2 Silica-polyamine based extraction materials for the separation of copper ions and ferric iron in aqueous leach liquids |
| 08/08/2002 | WO2002061156A1 Method for separating, enriching and recovering palladium |
| 08/08/2002 | WO2002061155A1 In-situ bio-oxidation of low-grade refractory sulphide minerals |
| 08/08/2002 | WO2002006541A3 Production of zinc oxide from acid soluble ore using precipitation method |
| 08/08/2002 | US20020104406 By removal of impurities contained in the material especially radionuclides; heating to form a solid titaniferous phase and a liquid oxide or glassy phase in the presence of a promoter, cooling and leaching |
| 08/07/2002 | EP1228259A1 Resin-in-pulp method for recovery of nickel and cobalt from oxidic ore leach slurry |
| 08/07/2002 | EP1228258A1 Method of removal of impurities from gold concentrate containing sulfides |
| 08/07/2002 | EP1228257A1 Atmospheric leach process for the recovery of nickel and cobalt from limonite and saprolite ores |
| 08/07/2002 | EP1228005A1 Process for reducing the concentration of dissolved metals and metalloids in an aqueous solution |
| 08/07/2002 | EP1082728B1 Method for reducing the level of radioactivity of a metal part |
| 08/07/2002 | CN1362999A Electrowinning cell incorporating metal ion filtration apparatus |
| 08/07/2002 | CN1362529A Green separation process of fluoride of Ce4+ and RE3+ in fluoric RE and sulfuric acid medium |
| 08/07/2002 | CN1362528A Two-section bacteria oxidation process to extract gold |
| 08/06/2002 | US6428604 Hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrate |
| 08/06/2002 | US6428602 Method for recovering platinum from platinum-containing coatings on gas turbine engine components |
| 08/06/2002 | US6428601 Cobalt recovery process |
| 08/06/2002 | US6428599 Iron-rich residue recyclable from the hydrometallurgical processing of flue dust |
| 08/06/2002 | US6428597 Using polyoxypropylene glycol, an alkylphenol ethoxylate and a paraffin oil solvent |
| 08/01/2002 | WO2002059387A1 Process for recovering palladium from a solution |
| 07/31/2002 | EP1226284A1 Apparatus for heating flowing material containing solids |
| 07/31/2002 | CN1361297A Basic sulfur and oxygen pressure leaching-out process of extracting gold/silver |
| 07/31/2002 | CN1361296A Basic pressure digestion process of high-calcium tungsten ore |
| 07/31/2002 | CN1361295A Direct zinc sulfide concentrate leaching-out process with coupled synergic leaching-out and solvent extraction and separation |
| 07/30/2002 | CA2237710C Recovery of nickel from copper refinery tankhouse electrolyte |
| 07/25/2002 | US20020096476 Separation method of goethite-containing red mud |
| 07/24/2002 | EP1224972A1 A method for recovering catalytic metals from a colloidal solution |
| 07/24/2002 | CN1360066A Catalyst for bacterial leaching of low-grade chalcopyrite-type copper sulfide ore |
| 07/24/2002 | CN1360065A Bacterial leaching-extraction-electric deposition process for extracting Zn from zinc ore |
| 07/24/2002 | CN1360064A Process for extracting Zn from Zn-containing sulfide ore |
| 07/23/2002 | US6423117 Extraction of valuable metal by acid cyanide leach |
| 07/18/2002 | US20020094564 Waste water treatment process; obtain water sanmple, incubate with sulfide ions, recover metal sulfides as they are precipated |
| 07/18/2002 | US20020092377 Method for thiosulfate leaching of precious metal-containing materials |
| 07/17/2002 | CN1358871A Method for extracting copper for copper containing sulfurized ore |
| 07/17/2002 | CN1087786C Cyclic carbamates noble metal extractant |
| 07/11/2002 | WO2002053788A1 Method for the recovery of base and precious metals by extractive chloridation |
| 07/11/2002 | WO2002006540A3 Method for extracting and separating metals using bacteria |
| 07/10/2002 | CN1357639A Purifying agent recovering method |
| 07/10/2002 | CN1087354C Solvent extraction process for improving purity of strontium and barium salts |
| 07/09/2002 | CA2162626C Process for leaching nickel-copper matte |
| 07/04/2002 | WO2002052050A1 Method for loparite concentrate processing |
| 07/04/2002 | WO2002052049A1 Method for processing nitrate solutions of the rare and non-ferrous metal industry and other chemical industries |
| 07/04/2002 | WO2002042505A8 Method for loparite concentrate processing |
| 07/04/2002 | US20020084220 Recovering a copper component from a cleaning agent that has been used for removing a phosphine or a silane contained as a harmful component in a harmful gas. |
| 07/04/2002 | US20020083795 Oxidizing the manganese constituent with a SO2/O2 mixture |
| 07/03/2002 | EP1218797A1 Method to extract silver from a photographic developer |
| 07/03/2002 | EP1218554A1 Reclamation of metals like uranium from contaminated solids such as incinerator ash by fluorination and leaching |
| 07/03/2002 | EP1115891A4 Process for extracting and recovering copper |
| 07/02/2002 | US6413296 Cyanide leaching of gold tellurides at 60-80 degrees c in alkaline environment with entrained air; no pretreatment; increased yield |
| 07/02/2002 | CA2289967C Methods for separation of titanium from ore |
| 07/02/2002 | CA2040541C Method for stripping metals in solvent extraction |
| 06/27/2002 | WO2002050321A2 Acid leaching of nickel laterite ores for the extraction of their nickel and cobalt values |
| 06/27/2002 | WO2002050319A1 Method for leaching copper concentrate |
| 06/27/2002 | WO2002049964A1 Production of synthetic rutile by continuous leaching |
| 06/27/2002 | WO2002002833A3 Preparation of pure ferric chloride from hydrochloric acid solutions by solvent extraction |
| 06/27/2002 | US20020079234 Solution mining; treating ore with a solution of acetic acid and hydrogen peroxide to form a leachate of lead ions, solvent extraction and treating the resulting aqueous solution of lead ions electrochemically to form lead oxide |
| 06/27/2002 | CA2431466A1 Method for leaching copper concentrate |
| 06/26/2002 | EP1217083A2 Production of synthetic rutile |
| 06/26/2002 | EP1064223B1 METHOD FOR REPROCESSING WASTE ACID RESULTING FROM TiO2 PRODUCTION |
| 06/26/2002 | CN2496876Y Ionic lare earth ore in-situ leaching pressure-regulation priming device |
| 06/26/2002 | CN1086741C Biochemical oxidation system and process |
| 06/25/2002 | US6410304 Method of biotreatment for solid materials in a nonstirred surface bioreactor |
| 06/25/2002 | US6409980 Process and apparatus for treating foundry sludge to recover magnesium |
| 06/25/2002 | US6409979 Selective precipitation of nickel and cobalt |
| 06/25/2002 | US6409022 Mineral collector compositions and processes for making and using same |
| 06/25/2002 | CA2236362C Method of solvent extraction of nickel sulfate |
| 06/25/2002 | CA2236125C Method for purifying nickel sulfate |
| 06/25/2002 | CA2147760C Production of metallic cobalt powder |
| 06/20/2002 | WO2002048046A2 Process for recovering arsenic from acidic aqueous solution |