| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
|---|
| 12/23/1998 | EP0885170A1 Method of biotreatment for solid materials in a nonstirred surface bioreactor |
| 12/22/1998 | US5851499 Method for pressure oxidizing gold-bearing refractory sulfide ores having organic carbon |
| 12/22/1998 | US5851490 Method for utilizing PH control in the recovery of metal and chemical values from industrial waste streams |
| 12/17/1998 | WO1998056516A1 Method for cleaning contaminated ground and soils and device for implementing the same |
| 12/17/1998 | WO1998056494A1 Method for separating and isolating precious metals from non precious metals dissolved in solutions |
| 12/17/1998 | WO1998056482A1 Pre-equilibration of a cationic extractant |
| 12/17/1998 | WO1998056481A1 A method for separating water soluble organics from a process stream by aqueous biphasic extraction |
| 12/16/1998 | EP0883427A1 Metallurgical dust recycle process |
| 12/16/1998 | CN1201836A Method for comprehensive uses by dissolving chromium residue to eliminate toxicity |
| 12/15/1998 | US5849172 Copper solvent extraction and electrowinning process |
| 12/10/1998 | WO1998055209A1 Method and system for selective removal of contamination from gas flows |
| 12/10/1998 | DE19723160A1 Recovery of valuable metals from catalysts having carrier bodies |
| 12/09/1998 | EP0854941A4 Electrochemical system |
| 12/09/1998 | CN1041115C Method for removing europium oxide from high-purity gadolinium oxide |
| 12/09/1998 | CN1041114C Method for producing titanium-enriched material and equipment thereof |
| 12/09/1998 | CN1041078C Process for calcium-less granulating roasting chromite |
| 12/08/1998 | US5846290 Method for the recovery of group IA salts during the treatment of industrial process waste streams |
| 12/08/1998 | CA2036058C Hydrometallurgic method for processing raw materials containing zinc sulphide |
| 12/08/1998 | CA1340169C Hydrometallurgical process for extracting gold and silver ores with bromate/perbromide solutions and compositions therefor |
| 12/02/1998 | EP0880726A1 Regeneration of spent fixer solution |
| 12/02/1998 | CN1200770A Method for treatment of mismuth-contg. sulphite ores or concentrates of such ore |
| 12/02/1998 | CN1200407A Process for extracting and recovering silver |
| 12/02/1998 | CN1040999C Process for elution of precious metals adsorbed on active carbon |
| 11/25/1998 | EP0879301A1 Improved beta-diketones for the extraction of copper from aqueous ammoniacal solutions |
| 11/25/1998 | CN1199710A Process for recovery of lithium and other metals and salts from brines in helminthoid evaporating system using solar energy |
| 11/25/1998 | CN1040889C Extracting technological method for purifying separating rare earth element |
| 11/24/1998 | US5840193 Fluid extraction using carbon dioxide and organophosphorus chelating agents |
| 11/24/1998 | US5840191 Process for the treatment of contaminated material |
| 11/19/1998 | WO1998051828A1 Sulfide mineral concentrate bioleaching |
| 11/19/1998 | WO1998051827A1 Integrated, tank/heap biooxidation process for the lixiviation of sulfide ores |
| 11/17/1998 | US5837188 Silver recovery system |
| 11/17/1998 | US5837122 Oxidation of electrolyte solution containing mixture of dissolved metal and impurities, then plating out metal onto cathode comprising porous conductive filaments, adsorption of impurities; purification |
| 11/12/1998 | WO1998050592A1 In-situ chemical reactor for recovery of metals or purification of salts |
| 11/12/1998 | CA2289126A1 In-situ chemical reactor for recovery of metals or purification of salts |
| 11/11/1998 | CN1040663C Recovery of palladium catalyst |
| 11/10/1998 | US5834294 Biooxidation process for recovery of metal values from sulfur-containing ore materials |
| 11/10/1998 | US5833937 Agglomerating by sequential addition of first water soluble anionic or nonionic polymer and second cationic water soluble polymer |
| 11/04/1998 | CN1040553C Method for treating blast furnace slag with diluted hydrochloric acid |
| 11/04/1998 | CN1040552C Pre-oxidating method for difficultly beneficiated gold containing ore or concentrated mineral by bacteria |
| 11/03/1998 | US5830424 Leachate contains metals that form fluorides |
| 11/03/1998 | US5829192 Method for focusing the growth of a vegetative root system to target a contaminated area |
| 11/03/1998 | US5829191 Method of growing and harvesting vegetation for use in remediating contaminated soil and/or groundwater |
| 10/30/1998 | CA2236124A1 Method for purifying nickel sulfate with acid extractant |
| 10/29/1998 | WO1998048066A1 Method for utilizing ph control in the recovery of metal and chemical values from industrial waste streams |
| 10/29/1998 | WO1998048063A1 Method for the recovery of group ia salts during treatment of industrial process waste streams |
| 10/29/1998 | CA2293688A1 Method for the recovery of group ia salts during treatment of industrial process waste streams |
| 10/28/1998 | EP0873429A1 Extracting metals directly from metal oxides |
| 10/28/1998 | CN1197485A Method of purifying gold |
| 10/28/1998 | CN1197120A Method of producing electrolytic copper from germ soaking of sulfide mineral |
| 10/28/1998 | CN1040417C Method for regeneration of hydrochloric soaked agent from hydrochloric soaked liquid |
| 10/27/1998 | US5827701 Method for the generation and use of ferric ions |
| 10/27/1998 | US5827349 Method of recycling nickel and cobalt alloy scrap metal contaminated with titanium |
| 10/27/1998 | US5827348 Treating with solution of cyanide ion and fluoroaliphatic surfactant |
| 10/21/1998 | EP0871800A1 Method for recovering copper |
| 10/21/1998 | EP0871787A1 Electrochemical processing method for catalyst substrates containing noble metals for the recovery thereof |
| 10/21/1998 | EP0871525A1 Liquid medium extraction purification method |
| 10/21/1998 | EP0789608A4 Processes for separating cesium from industrial streams containing other alkali metals using poly(hydroxyarylene) polymeric resins |
| 10/21/1998 | EP0716715B1 Recovery of aluminum and/or fluoride values from used aluminum chlorofluorides |
| 10/21/1998 | CN2294961Y Solid-liquid separating apparatus for gold-ore sorting by carbon slurry method |
| 10/20/1998 | US5826162 leaching of titaniferous materials |
| 10/20/1998 | US5824631 Organonitro compound for oxidation of soft metal, a carboxylic acid for salt formation and a solvent for removal of compound |
| 10/14/1998 | EP0701630B1 Solid bonded oxygen-donor macrocyclic ligands for removing and concentrating metals |
| 10/14/1998 | CN1196096A Copper recovery process |
| 10/13/1998 | US5820966 Removal of arsenic from iron arsenic and sulfur dioxide containing solutions |
| 10/13/1998 | US5820653 Process for making shaped copper articles |
| 10/08/1998 | WO1998044162A1 Dipyridylamine ligand bound to a polymer carrier for extracting metal ions |
| 10/08/1998 | DE19715319A1 Removal of metal from electronic scrap |
| 10/07/1998 | EP0660949B1 Treatment of photographic effluent |
| 10/07/1998 | CN1040133C Method for extracting zinc from sulphurized concentrates |
| 10/07/1998 | CN1040132C Synthetic method for extracting vanadium for bone coal |
| 10/04/1998 | CA2201797A1 Gold extraction apparatus |
| 09/30/1998 | CN2292806Y Apparatus for separating rare-earth by electrolytic extraction |
| 09/30/1998 | CN1194237A Wet process for preparing industrial pure antimony sulfide by removing load, arsenic, selenium, tin and mercury impurities in antimonic ore |
| 09/30/1998 | CN1040029C Hydrometallurgical process for recovery of precious metal values from precious metal ores |
| 09/24/1998 | WO1998041328A1 Fibre optic sagnac nterferometer |
| 09/23/1998 | EP0800710B1 Process for recovery of metals from used nickel-metal hydride accumulators |
| 09/23/1998 | CN1193660A Method for removing copper from melted nickle and cobalt |
| 09/17/1998 | DE19710529A1 Verfahren zur Anreicherung von Silber oder anderen Wertmetallen durch Flotation aus einer Suspension, beispielsweise aus den Rückständen der Zinklaugung Method for the enrichment of silver or other precious metals by flotation from a suspension, for example, from the residues of wet extraction of zinc |
| 09/15/1998 | US5807479 Process for recovering copper from copper-containing material |
| 09/11/1998 | WO1998039492A1 Reoximation of metal extraction circuit organics |
| 09/11/1998 | WO1998039491A1 A process for the leaching of chalcopyrite |
| 09/11/1998 | WO1998039249A1 Method for producing hyperazeotropic hydrochloric acid from metal chloride solutions |
| 09/11/1998 | CA2289463A1 Reoximation of metal extraction circuit organics |
| 09/09/1998 | EP0863138A1 A process for recovering mercapto-s-triazines from silver precipitate |
| 09/09/1998 | EP0862659A1 METHOD FOR RECOVERING NICKEL FROM HIGH MAGNESIUM-CONTAINING Ni-Fe-Mg LATERITIC ORE |
| 09/09/1998 | EP0862658A1 A method for the treatment of bismuth-containing sulphide ores or concentrates of such ore |
| 09/09/1998 | CN1192785A Method for recovering nickel hydrometallurgically from two different nickel mattes |
| 09/09/1998 | CN1192479A Process for producing high-purity lutetium oxide by extracting separation method |
| 09/09/1998 | CN1192478A Process for producing rare-earth with various kinds of pureness specifications by separation method |
| 09/02/1998 | EP0795036A4 Method for producing iron feedstock |
| 09/02/1998 | CN1192165A Process for making shaped copper articles |
| 09/02/1998 | CN1039637C Method for production of high-purity manganese carbonate with pyrolusite |
| 09/01/1998 | US5800593 Separation of clays from sulfides, oxidation and recovering metals |
| 08/27/1998 | WO1998037247A1 Hydrometallurgical process for the recovery of nickel and cobalt by ammoniacal leaching |
| 08/27/1998 | WO1998037022A1 Treatment of a solution containing iron salts |
| 08/27/1998 | CA2256560A1 Hydrometallurgical process for the recovery of nickel and cobalt by ammoniacal leaching |
| 08/26/1998 | EP0860187A2 Multi-stage solvent extration of metal value |
| 08/26/1998 | CN1191521A Method of biotreatment for solid materials in nonstirred surface bioreactor |
| 08/26/1998 | CN1191495A Liquid medium extraction purification method |
| 08/25/1998 | US5797977 Neutralizing solution of chloroplatinic acid in two stages, filtering out precipitated impurities, adding hydrochloric acid and ammonium chloride, intensely heating ammonium chloroplatinate formed to yield sponge platinum |