| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 01/09/2003 | WO2003002774A1 A method for the removal of metals from an aqueous solution using lime precipitation |
| 01/09/2003 | WO2002042504A3 Bioproduct production during oxidisation of metal sulphide minerals by means of microorganisms |
| 01/09/2003 | US20030008145 Complex of metal and ligand; using reducing agent; catalyst |
| 01/08/2003 | EP1273013A2 A method for isolating and purifying ?90 y from ?90 strontium in multi-curie quantities |
| 01/08/2003 | EP1272680A2 Heap leaching of nickel containing ore with sulfuric acid |
| 01/08/2003 | EP1090150B1 Preparation of collector compositions of fatty hydroxamic acids in admixture with an oil for ore flotation |
| 01/08/2003 | CN1098361C Process for extracting and separating cerium and thorium from hamartite leachate |
| 01/07/2003 | CA2101078C Regeneration of hydrochloric acid |
| 01/03/2003 | WO2002050321A3 Acid leaching of nickel laterite ores for the extraction of their nickel and cobalt values |
| 01/02/2003 | EP1269554A1 A method for recycling spent lithium metal polymer rechargeable batteries and related materials |
| 01/02/2003 | EP1268867A1 Method and a plant for removing mercury contamination from metal with a reducing liquid |
| 01/01/2003 | CN1388256A Method of recovering Pd from low-concentration waste Pd ion liquid with becteria thallus |
| 01/01/2003 | CN1388255A Method of processing antimong-containing material |
| 01/01/2003 | CN1097643C Process for making copper foil |
| 01/01/2003 | CN1097637C Method for extracting gold from alkaline cyanide liquid |
| 12/31/2002 | US6500396 Separation of titanium halides from aqueous solutions |
| 12/31/2002 | US6500395 Removing metals such as lead, cadmium and mercury from air pollution control residues using alkaline wash followed by acid wash |
| 12/31/2002 | US6500231 Selectively dissolving into a dissolution solution a portion of substrate so that portion of precious metal-containing coating is physically released from substrate, wherein dissolution solution is different from leach solution |
| 12/31/2002 | US6500229 Method for treating steel works dust by wet process |
| 12/27/2002 | WO2002103068A1 Device for loparite concentrate and other concentrates breaking down by highly volatile acids and compounds |
| 12/27/2002 | WO2002022899A3 Removal of base metals during cyanide/cip processing of gold and silver ores |
| 12/26/2002 | US20020198097 Method of adsorbing metals and organic compounds from vaporous streams |
| 12/26/2002 | US20020194963 Separating clays and fines from a crushed refractory sulfide ore, forming a heap, adding concentrate of separated sulfide fines to the heap, bioleaching (biooxidation) and hydrometallurgically treating bioleached ore |
| 12/26/2002 | US20020194962 Biooxidation, with heap having a given concentration of the exposed sulfide mineral particles per tonne of solids; copper extraction from copper sulfide ores |
| 12/25/2002 | CN1387584A Method for reduction of nickel |
| 12/25/2002 | CN1387583A Method for reduction of nickel from aqueous solution |
| 12/25/2002 | CN1387582A Recovery of zinc from zinc bearing sulphide minerals by bioleaching and electrowinning |
| 12/25/2002 | CN1387581A Bioleaching of sulphide minerals |
| 12/25/2002 | CN1387580A Base metal recovery from tailings drum by bacterial oxidation |
| 12/25/2002 | CN1386870A Process for recovering Mo from low-grade molybdenite by dump leaching |
| 12/25/2002 | CN1097094C Method for solubilization of metal component from non-soluble fluoride-contg. Ta-Nb ore |
| 12/24/2002 | US6498031 Column reactor for testing and evaluating refractory ores |
| 12/24/2002 | US6497850 Production of low sodium lithium carbonate and lithium chloride from a brine concentrated to about 6.0 wt % lithium are disclosed. methods and apparatus for direct recovery of technical grade lithium chloride from the concentrated brine |
| 12/24/2002 | US6497745 Method for processing elemental sulfur-bearing materials using high temperature pressure leaching |
| 12/24/2002 | CA2028324C Method for the solvent extraction of zinc |
| 12/19/2002 | WO2002101182A2 Solvent extraction mixture comprising substituted imidazole or benzimidazole for the separation of groups of base metals |
| 12/19/2002 | WO2002101101A2 Solvent extraction mixture comprising substituted imidazole or benzimidazole for the purification of base metals |
| 12/19/2002 | WO2002092862A8 Improved leaching process |
| 12/18/2002 | EP1190105B1 Recovery of noble metals by lixiviation with thiourea controlled acidic solution |
| 12/18/2002 | CN1385545A Method for recovering platinum, palladium and rhodium from waste catalyst in car tail gas |
| 12/17/2002 | US6494932 Recovery of natural nanoclusters and the nanoclusters isolated thereby |
| 12/17/2002 | CA2225798C Liquid medium extraction purification method |
| 12/17/2002 | CA2215963C Atmospheric mineral leaching process |
| 12/12/2002 | WO2002099145A1 Method for recovering metals from the flying ashes generated in an integrated gasification combined cycle-type (igcc) thermal station |
| 12/12/2002 | WO2002099144A1 Selective recovery of precious metal(s) |
| 12/12/2002 | US20020184972 Contacting ore of zircon, baddeleyite, and uranium at 135-255 degrees C with sulfuric acid; leach liquor of zirconium and uranium values and solids of baddeleyite and silica |
| 12/12/2002 | CA2449353A1 Selective recovery of precious metal(s) |
| 12/11/2002 | CN1384890A Recovery of copper from copper bearing sulphide minerals by bioleaching with controlled oxygen feed |
| 12/11/2002 | CN1384214A Carbon reducting roast process of producing RE chloride with mixed RE concentrate |
| 12/11/2002 | CN1095809C Treatment of solution cintaining iron salts |
| 12/05/2002 | WO2002097144A2 Process for selectively removing molybdenum from solutions containing molydenum and vanadium using a xanthate complexant |
| 12/05/2002 | US20020179451 Apparatus and method for recovery of gold and silver from ore |
| 12/04/2002 | EP1261750A1 Process for refining silver bullion with gold separation |
| 12/04/2002 | EP1261749A2 Process for organic acid bioleaching of nickel ore |
| 12/04/2002 | CN1383456A Method for producing platinum material reinforced with dispersed oxide |
| 12/04/2002 | CN1383389A Method for reducing size of solvent extraction process steps and cell for using in solvent extraction process |
| 12/04/2002 | CN1382813A Fully wet technology for extracting Mg from Mg contained dust |
| 12/03/2002 | CA2376883C Recovery of nickel and cobalt values from a sulfidic flotation concentrate by chloride assisted oxidative pressure leaching in sulfuric acid |
| 11/28/2002 | US20020174744 Method for producing metal or metal compound comprising process of treating with fluorine and adjusted raw material used therein |
| 11/27/2002 | EP1259652A1 Process and apparatus for recovery of cyanide and metals |
| 11/27/2002 | EP0951571B1 Fluid extraction of metals or metalloids |
| 11/27/2002 | CN1382227A Production of zinc oxide from complex sulfide concentrates using chloride processing |
| 11/27/2002 | CN1381599A Semi-dry desorption process for preparing ammonium paratungstate by ion exchange method |
| 11/27/2002 | CN1094986C Improved beta-diketones for extraction of copper from aqueous ammoniacal solutions |
| 11/27/2002 | CN1094984C Process for extracting fold and silver by removing impurities with acid and alkali |
| 11/26/2002 | US6485629 Process for separation of heavy metals from residues by use of ethylene-diamine-disuccinic acid (edds) complexant |
| 11/26/2002 | CA2113650C N-ethyl hydroxamic acid chelants |
| 11/21/2002 | WO2002092863A1 Extraction process |
| 11/21/2002 | WO2002092862A1 Improved leaching process |
| 11/21/2002 | WO2002066691A3 Sieve tray column and process for recovery of metal value |
| 11/21/2002 | US20020174451 Recovering metals from soil |
| 11/21/2002 | DE10121952A1 Removing platinum and/or palladium from an aqueous nitric acid solution comprises contacting the solution with a weakly basic ion exchanger, and eluting the charged ion exchanger with concentrated aqueous hydrochloric acid |
| 11/20/2002 | EP1258535A1 Process for electrolytic production of highly pure zinc or zinc compounds from primary and secondary zinc raw materials |
| 11/20/2002 | EP1257674A1 Method for upgrading steel plant dust |
| 11/20/2002 | CN1380429A High calcium tungsten mineral decomposition method by means of normal pressure alkali boiling process |
| 11/19/2002 | US6482372 Process for recovering palladium from a solution |
| 11/19/2002 | US6482250 Nozzle for low pressure flash tanks for ore slurry |
| 11/14/2002 | WO2002090605A1 Acid digestion process for treating alumina-bearing ores to recover metal values therefrom |
| 11/14/2002 | WO2002090263A1 Autoclave control mechanisms for pressure oxidation of molybdenite |
| 11/14/2002 | WO2002089944A1 Production of pure molybdenum oxide from low grade molybdenite concentrates |
| 11/14/2002 | US20020168310 Process for upgrading a titaniferous material containing silica |
| 11/14/2002 | US20020168309 Method for recovering catalytic metals |
| 11/14/2002 | US20020166761 For removal of contaminants such as mercury from a gas stream |
| 11/13/2002 | EP1255697A1 Method for recovering rhodium from reaction products of oxosynthesis |
| 11/13/2002 | EP0764042B1 Fluid extraction |
| 11/13/2002 | CN1379738A Process for reducing concentration of dissolved metals and metalloids in aqueous |
| 11/07/2002 | US20020162417 Producing cobalt carbonyl and nickel carbonyl and iron carbonyl from metallic species mixture; separating cobalt carbonyl; treating cobalt carbonyl with nitric oxide and carbon monoxide to form complex; decomposition |
| 11/06/2002 | WO2001086010A1 Method for eliminating nickel ions and lead ions from ferrous salt solutions |
| 11/06/2002 | CN1378604A Method for producing metal or metal compound comprising process of treating with fluorine and adjusted raw material used therein |
| 11/06/2002 | CN1377980A Process for preparing high purity ammonium para-tungstate using hihg-molybdenum tungsten ore |
| 11/06/2002 | CA2408356A1 Method for eliminating nickel ions and lead ions from ferrous salt solutions |
| 11/05/2002 | US6476040 Processes and intermediates for preparing anti-cancer compounds |
| 11/05/2002 | US6475450 Method of leaching zinc concentrate |
| 11/05/2002 | US6475449 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 |
| 11/05/2002 | US6475448 Heating; adding chlorate; forming ruthenium tetraoxide |
| 11/05/2002 | CA2189631C Process for recovering rare earth metal from oxide ore by concentration and separation |
| 10/31/2002 | WO2002086173A1 Removal of non-water soluble substances from solutions of aqueous metal extracts |
| 10/31/2002 | WO2002085498A1 Method of adsorbing metals and organic compounds from vaporous streams |
| 10/31/2002 | WO2002068701A3 Production of zinc oxide from complex sulfide concentrates using chloride processing |
| 10/31/2002 | US20020159927 Leaching the complex sulfide material with hydrochloric acid, ferric chloride, and oxygen; precipitating iron from leach using lime and oxygen, removing copper, silver, lead etc. by cementation with zinc dust, precipitating ZNO using lime |