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)
11/2003
11/27/2003WO2003097533A1 Process for removal of radioactive impurities from zirconium containing materials
11/27/2003WO2003097207A1 Method and equipment for compressing a dispersion in liquid-liquid extraction
11/27/2003WO2003097206A1 Method and equipment for guiding a dispersion in liquid-liquid extraction
11/27/2003WO2003097205A1 Method and equipment to control separation of a dispersion in liquid-liquid extraction
11/27/2003US20030219367 Process for the utilization of vanadium in chromium ore as ammonium metavanadate
11/26/2003EP1364073A2 Sieve tray column and process for recovery of metal value
11/26/2003CN1458291A Noble metalregeneration recovering method for electronic waste material
11/26/2003CN1458290A Leaching metal sulfide of life waste water and waste solid organism
11/25/2003US6652819 Combusting the carbonaceous residues at 500-690 degrees C.; heating the residues at a specific temperature and oxygen partial pressure to obtain a tetravalent vanadium compound; leaching with sulfuric acid; basification to precipitate
11/25/2003US6652623 Method and kit for working up a gold bath
11/25/2003US6652622 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
11/25/2003CA2167571C Hydrometallurgical process for the recovery of precious metal values from precious metal ores with thiosulfate lixiviant
11/20/2003WO2003095687A1 Oxidation process
11/20/2003US20030216463 Novel heteroatom containing tetracyclic derivatives as selective estrogen receptor modulators
11/19/2003EP1242638B1 A process for the recovery of copper from aqueous solutions containing iodinated organic compounds
11/19/2003EP1099010B1 Method for recovering precious metals
11/19/2003CN1456693A Method for producing low-stacking density nano-zinc oxide by ammonia leaching method
11/19/2003CN1456692A Wet process sulfide mineral leaching-out method
11/19/2003CN1128233C Method of reducing low concentration gold ion in aqueous solution by bacterial adsorption
11/13/2003WO2003093517A1 Atmospheric pressure leach process for lateritic nickel ore
11/13/2003WO2003093516A1 Method for refining concentrate containing precious metals
11/13/2003WO2003093515A1 Separation of platinum group metals
11/13/2003US20030209106 Filtration of colloids; combustion
11/13/2003CA2484416A1 Method for refining concentrate containing precious metals
11/13/2003CA2484134A1 Atmospheric pressure leach process for lateritic nickel ore
11/12/2003EP1361296A1 Method for electrolytic production of ultra-pure zinc or zinc compounds from zinc primary and secondary raw materials
11/12/2003EP1183400B1 Method for separating in an aqueous medium lanthanides and/or actinides by combined complexing-nanofiltration, and novel complexing agents therefor
11/12/2003CN2585871Y High temp. and high pressure stripping electrolyzer
11/12/2003CN1455009A Preparation of rare earth chloride from long-chain fatty acid extracting transformation and back-extraction process thereof
11/12/2003CN1455008A Method of producing sodium tungstate solution using scheelite powder as raw material
11/12/2003CN1455007A Arsonium-containing cupric sulfide concentrate smelting process by wet method
11/12/2003CN1454706A Chelating resin special for adsorbing gallium and preparing method thereof
11/12/2003CN1454693A Treatment method of degrading or esterification for carboxylic acid extracting agent
11/11/2003US6645444 Complex of metal and ligand; using reducing agent; catalyst
11/10/2003CA2428310A1 Process of recovering copper from ore
11/06/2003WO2003091463A1 Method for the recovery of gold
11/06/2003US20030206842 Pretreatment to render silica amenable to leaching and an aqueous leach in the presence of an acid; conditions are such that silica that enters solution is not hydrolysed or precipitated as a silicate.
11/06/2003US20030206822 High purity iron, method of manufacturing thereof, and high purity iron targets
11/05/2003CN1453381A Scheelite decomposing process
11/05/2003CN1453380A Improved process of extracting manganese from dialozite
11/05/2003CN1453379A Wet process of extracting vanadium and/or molybdenum from waste catalyst
11/05/2003CN1453378A Negative pressure leachate raising method for in-situ lixiviation of tailing for re-dressing
11/05/2003CN1126821C Process for extracting vanadium
11/04/2003US6642199 For selectively removing materials containing nickel from substrates
11/04/2003US6641642 High temperature pressure oxidation of ores and ore concentrates containing silver using controlled precipitation of sulfate species
11/04/2003US6641641 Method for producing metal or metal compound comprising process of treating with fluorine and adjusted raw material used therein
10/2003
10/30/2003WO2003089677A1 Process for the treatment or removal of impurities in a hydrometallurgical extraction process
10/30/2003WO2003089675A1 Method for the purification of copper chloride solution
10/29/2003EP1235952B1 Method of electrochemical in situ disposal of metal structures
10/29/2003CN1452605A Method for recovery of metals by incineration of metal contg. basic ion exchange resin
10/29/2003CN1451787A Electrochemical powder decomposing method and eleclrotyzer adapted for same
10/29/2003CN1451771A Method for recovery of lithium from used lithium ion cell with ion sieve
10/29/2003CN1125883C High Purity zinc and its preparing process
10/28/2003CA2252679C Integral multi-layered ion-exchange composite membranes
10/23/2003WO2003087416A1 Process for extracting platinum group metals
10/23/2003WO2002066690A3 Method of purification of a redox mediator solution before electrolytic regeneration thereof
10/23/2003US20030196902 In particular high melting alloys such as rhenium/tungsten alloys, rhenium/molybdenum alloys, rhenium/molybdenum/tungsten alloys, superalloys, and alloy systems containing noble metals
10/22/2003EP1354968A2 Process for electrochemical dissolution of high-melting point special alloy powders and electrolytic cell suitable therefor
10/22/2003EP0900249B1 Integral multi-layered ion-exchange composite membranes
10/22/2003EP0828552B1 Process for recovery of metal ions
10/22/2003CN1450182A Method for producing high purity metal zinc from zinc oxide ore
10/21/2003US6635180 Precious metals
10/17/2003CA2425504A1 Process for the electrochemical decomposition of powders and electrolysis cells suitable therefor
10/16/2003WO2003084864A2 Method of producing high-purity indium powder
10/16/2003US20030192404 Process for the treatment or removal of impurities in a hydrometallurgical extraction process
10/16/2003US20030192403 Drainage aid for metal heap leaching
10/15/2003CN1448541A Process for preparing high-purity silver by electrolyzing extracted silver-contained organic phase
10/15/2003CN1448540A Process for preparing high-purity copper by electrolyzing extracted copper-contained organic phase
10/15/2003CN1448522A Method of recovering noble metal from spent catalyst containing noble metal
10/14/2003US6632410 Solvent extraction process
10/14/2003US6632264 Gold recovery from thiosulfate leaching
10/14/2003US6632113 Image display apparatus, disassembly processing method therefor, and component recovery method
10/14/2003CA2023025C Process of extracting anions with quaternary amines
10/09/2003WO2003083147A1 Process for recovery of gallium
10/09/2003WO2003048400A3 Process for the treatment of molybdenum concentrate also containing copper
10/09/2003US20030190274 Extraction of metals with diquaternary amines
10/08/2003CN1446931A Method for removing zinc and cobalt in cobalt dregs generated in zinc hydrometallurgy by using ultrasonic separation
10/02/2003WO2003080879A1 Process for the recovery of gold and silver from used refractory bricks
10/02/2003WO2003080878A1 Process for the recovery of nickel from spent catalyst
10/02/2003US20030183043 Ultrasound enhanced process for extracting metal species in supercritical fluids
10/01/2003EP1135537B1 Treating niobium and/or tantalum containing raw materials
10/01/2003CN2576722Y Bacteria oxygenation apparatus for difficult-to-sort metallurgical preparation concentrate
10/01/2003CN1445381A Method for recovering catalytic metal using porous metal filter
10/01/2003CN1445380A Method for recovering catalytic metal
10/01/2003CN1445373A Method for promoting activated carbon fibers to reduction and adsorbing noble metal ions by organic chelating agent
09/2003
09/30/2003US6627165 Pretreatment for rendering silica amenable to leaching; aqueous leaching in the presence of an acid, such that silica forms solution and is not hydrolysed or precipitated as a silicate
09/30/2003US6627085 Treatment of brine to remove metals and silicon therefrom
09/30/2003US6626979 Adding a seeding agent to the vessel during oxidation
09/25/2003WO2003078670A1 Method for separating platinum group element
09/25/2003WO2003010346A3 Wet process and reactor for the recovery of platinum group metals from automobile catalytic converters
09/24/2003EP1346071A2 Bioproduct production
09/24/2003EP1346070A1 Method for leaching copper concentrate
09/24/2003EP1090151B1 Process for separation of heavy metals from residues by use of of ethylenediamine-disuccinic acid (edds) complexant
09/24/2003CN1443859A Process for producing CuSO2‰À5H2O by using copper oxide ore wet method
09/24/2003CN1122111C Method for preparing high purity zine oxide by using smithsonite
09/23/2003US6623712 Method for dissolving plutonium or a plutonium alloy and converting it into nuclear fuel
09/23/2003CA2132440C Oxidation of metal sulfides using thermotolerant bacteria
09/18/2003WO2003076671A1 Methods to reduce hydrosulphide and arsine emissions during wet ore processing
09/18/2003WO2003054238A8 A method for the recovery of cobalt
09/18/2003CA2478033A1 Methods to reduce hydrosulphide and arsine emissions during wet ore processing
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