Patents
Sitemap › C22 - Metallurgy; Ferrous or non-ferrous alloys; Treatment of alloys or non-ferrous metals › C22B - Production or refining of metals; Pretreatment of raw materials › C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes
Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429)
06/2003
06/18/2003CN1424414A Method for removing iron and thorium impurities in rare earth sulfuric acid double salt
06/18/2003CN1424413A Method for extracting copper from mixed copper ores
06/18/2003CN1111510C Process for preparing activated zinc oxide
06/17/2003US6579504 Leaching flotation concentrate to dissolve metal sulfides; filtration, separation, roasting, chlorination, precipitation
06/17/2003CA2186356C Hydrometallurgical extraction process for treating ores containing copper alone or copper and gold
06/12/2003WO2003048400A2 Process for the treatment of molybdenum concentrate also containing copper
06/12/2003WO2003047768A1 Method for inhibiting oxidation of metal sulfide-containing material
06/12/2003US20030108464 Method for separating metal ions
06/12/2003US20030108462 For wood; chelation of toxic material; separation
06/11/2003CN2555269Y Deep heat pressure oxidation treatment equipment for hard immersion gold ore
06/11/2003CN1422967A Method for preparing nickel and aluminium chemical product from catalyst refuse containing nickel and AL2O3
06/11/2003CN1422809A Method for separating rhenium
06/11/2003CN1111204C Preparation of high-purity chloro-osmate solution
06/10/2003US6576590 Materials for the separation of copper ions and ferric iron in liquid solutions
06/10/2003US6576041 Introducing a feed of sulfide mineral in particulate form into a reactor, introducing oxygen gas to contact with slurry and oxidize mineral to form metal value; agitation
06/05/2003WO2003046236A1 Method for processing loparite concentrate
06/05/2003WO2003046235A1 Method for breaking down loparite concentrate
06/05/2003WO2003046234A1 Method for processing loparite concentrate
06/05/2003WO2003046233A1 Integrated ammoniacal solvent extraction and hydrogen reduction of nickel
06/05/2003WO2003046232A1 Integration processes of the treatments of zinc silicate concentrates or zinc silicate ore and roasted concentrates of zinc sulphides
06/05/2003CA2468518A1 Integrated ammoniacal solvent extraction and hydrogen reduction of nickel
06/04/2003EP1315693A1 Recovery of metals by incineration of metal containing basic ion exchange resin
06/04/2003EP1171641A4 Method for treating precious metal bearing minerals
06/04/2003EP0771370B1 Process for electrochemically dissolving a metal such as zinc or tin
06/04/2003CN1421534A One-step conversion and grouping process of extracting RE sulfuric acid solution with di (2-ethylhexyl) phosphoric acid
06/03/2003US6572677 Recovering silver from waste photographic processing solution comprising silver ions by contacting with body of material comprising fine iron particles dispersed in binder matrix of crosslinked gelatin, which reduces silver ions to silver metal
06/03/2003CA2364213A1 Process for the treatment of molybdenum concentrate
05/2003
05/28/2003EP1314788A2 A method for recovering catalytic metals using a porous metal filter
05/28/2003EP1165847B1 Cyanide recovery from aqueous ore processing solutions by solvent extraction
05/28/2003EP1064411B1 Extraction of valuable metal by acid cyanide leach
05/28/2003EP1019553B1 Method for dissociating metals or dissociating metal compounds
05/28/2003CN1420185A Obtaining product by solubilizing metal component from Ta-Nb metal ore contg. insoluble fluoride
05/28/2003CN1420184A Method for extracting indium concentrate form indium and tin oxide waste
05/27/2003US6569339 Method for reducing the size of solvent extraction process steps and cell for using in the solvent extraction process
05/27/2003US6569224 Hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrate
05/27/2003CA2255874C Disposal of arsenic from sulfur dioxide-containing solutions
05/27/2003CA2239960C Biological oxidation of sulphide minerals
05/22/2003WO2003042604A1 An air distributor for a bioleaching system
05/22/2003WO2002061157A3 Silica-polyamine based extraction materials for the separation of copper ions and ferric iron in aqueous leach liquids
05/21/2003EP1312686A2 Electrochemical dissolution process for disintegrating superalloy scraps
05/21/2003CN1418985A Electrochemical decomposition method for high-temp. alloy
05/21/2003CN1418972A Method for preparing nano active zinc oxide from low grade zinc containing material
05/20/2003US6566561 Phenoxy fluoro-alcohols, their preparation, and their use as phase modifiers and solvating agents
05/20/2003US6566161 Tantalum sputtering target and method of manufacture
05/15/2003US20030089619 Process and apparatus for recovery of cyanide and metals
05/15/2003US20030089202 Elution with a concentrated aqueous hydrochloric acid solution and an oxidizer; extend the life of ion exchangers; one step process
05/15/2003US20030089201 Bio-oxidizing the sulphidic ore with acidophilic microorganisms by providing air to the bottom of the heap, irrigating the top of the heap with a sulphuric acid solution, then solvent extraction, electrowinning
05/14/2003EP1310459A1 Process for recovering Rhenium
05/14/2003EP1218554B1 Reclamation of metals like uranium from contaminated solids such as incinerator ash by fluorination and leaching
05/09/2003CA2411345A1 Process for isolating rhenium
05/08/2003WO2003038137A1 Recovery of copper from chalcopyrite
05/08/2003US20030086864 Forming aqueous slurry of low grade molybdenite concentrates; oxidizing; filtering discharge; leaching solid filter cake with an alkaline solution; filtering second discharge; recovering the molybdenum value; crystallization
05/08/2003US20030086849 Method for processing elemental sulfur-bearing materials using high temperature pressure leaching
05/07/2003EP0970258B1 Polymeric combinations used as copper and precious metal heap leaching agglomeration aids
05/07/2003EP0879301B1 Improved beta-diketones for the extraction of copper from aqueous ammoniacal solutions
05/06/2003US6558642 Removal of mercury and other metals, as well as furans, dioxins and other organic compounds from high temperature and high moisture gaseous streams; utilizes an adsorption powder containing a carbon-based powder and cupric chloride
05/06/2003US6558449 Waste metal removal systems and methods
05/01/2003WO2003035916A1 A method for purifying the solution in the hydrometallurgical processing of copper
05/01/2003WO2003010345B1 Method for improving metals recovery using high temperature pressure leaching
05/01/2003WO2002097144A3 Process for selectively removing molybdenum from solutions containing molydenum and vanadium using a xanthate complexant
05/01/2003US20030082864 Tantalum sputtering target and method of manufacture
05/01/2003US20030082084 Methods for removing heavy metals from water using chemical precipitation and field separation methods
04/2003
04/30/2003CN1415022A Process for electrolytic production of highly pure zinc or zinc compounds from primary and secondary zinc raw materials
04/30/2003CN1414123A Method of recovering waste copper foil
04/30/2003CN1414121A Method of treating low grade zinc oxide ore
04/30/2003CN1414120A Method of producing tungstic acid by closed type hydrochloric acid decompose tunstite
04/30/2003CN1413912A Process for preparing thiomolybdate for molybdenum separated from sodium tungstate solution containing molybdenum
04/30/2003CN1413911A Process for preparing high-purity Nano-class zinc oxide
04/29/2003US6555010 Forming colloid metal particles
04/29/2003US6555008 Aluminosilicate polymer bearing on its surface organic radicals with functions of SH or -S(CH2)nS- where n is 11-14; and a silver complexing agent that is released into an aqueous developer for silver halide photographic products.
04/24/2003WO2003033747A1 Separation and recovery of precious metals using polymer materials
04/24/2003US20030075510 Purification via hyperstoichiometric addition of sodium sulfide, adhesion, filtration, then precipitation
04/24/2003US20030075021 Using sulfuric acid to recover titanium, iron, nickel, colbalt, silver and gold
04/23/2003EP1303642A2 Method for recovering copper from sulfide ore materials using high temperature pressure leaching, solvent extraction and electrowinning
04/23/2003EP1303641A2 Method for recovery of copper from sulfidic ore materials using super-fine grinding and medium temperature pressure leaching
04/23/2003EP1303640A2 Processing elemental sulfur-bearing materials using high temperature pressure leaching for sulfuric acid production and metal recovery
04/23/2003CN2546456Y Apparatus for recovering gold from tailings liquid
04/23/2003CN1412327A Ammonium salt liquid phase oxidation direct leaching method for nonferrous metal sulfide mineral
04/22/2003US6551378 Recovery of precious metals from low concentration sources
04/17/2003WO2003031666A1 Chloride melt process for the separation and recovery of zinc
04/17/2003WO2003031664A1 Treatment of a wide range of titanium compounds
04/17/2003CA2460883A1 Chloride melt process for the separation and recovery of zinc
04/16/2003CN1410564A Method of oxidating extracting cerium from cerium containing rare earth sulfuric acid solution
04/16/2003CN1410563A Biological gold extraction method of difficult separation concentrate and special equipment
04/16/2003CN1410562A United decomposition technology of tungstite, wolframite alkali decomposition
04/16/2003CN1410352A Comprehensive utilization method of converting chromium slag totally into light magnesium carbonate and fine iron breeze
04/10/2003US20030066389 Forming nickel sulfide from nickel oxide ore; hydrometallurgy; reacting with copper; chlorine leaching nickel
04/09/2003CN1409772A Bacterially assisted heap leaching method
04/09/2003CN1409771A Recovery of precious metals
04/03/2003WO2003027339A1 Metal ion recovery
04/03/2003WO2002101182A3 Solvent extraction mixture comprising substituted imidazole or benzimidazole for the separation of groups of base metals
04/03/2003WO2002101101A3 Solvent extraction mixture comprising substituted imidazole or benzimidazole for the purification of base metals
04/03/2003US20030064013 Solvent extraction of impurity metals from a valuable metal sulphate solution
04/03/2003US20030061910 Processes for the recovery of copper from aqueous solutions containing nitrate ions
04/03/2003CA2460813A1 Metal ion recovery
04/02/2003CN1407120A Process for oxidation leaching-out, cuprous chloride and refining copper from cupric sulfide
04/01/2003CA2222900C Method of biotreatment for solid materials in a nonstirred surface bioreactor
03/2003
03/27/2003WO2003025235A1 Process for the recovery of lead from scrap batteries
03/27/2003WO2003025234A2 Method for obtaining cobalt and nickel from ores and ore concentrates
03/27/2003WO2003006695B1 Hydrometallurgy method for leaching oxidised ores and metal recovery
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