| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
|---|
| 08/19/1998 | CN1039543C Method for making high-purity rare-earth by separating heavy metal impurity |
| 08/18/1998 | US5795482 Use of hydrocarbon-soluble aminomethylene phosphonic acid derivatives in the solvent extraction of iron ions from aqueous solutions |
| 08/18/1998 | US5795465 Process for recovering copper from copper-containing material |
| 08/12/1998 | EP0705127B1 Solvent extraction of metal containing species |
| 08/11/1998 | US5792357 Method and apparatus for back-extracting metal chelates |
| 08/11/1998 | US5792235 Method for recovering gold and other precious metals from carbonaceous ores |
| 08/05/1998 | CN1189541A Method of extracting copper, iron gold, silver and sulphur from auricupride |
| 08/05/1998 | CN1039390C Multi-tank electrostatic quasi-liquid-film separator |
| 08/04/1998 | US5789496 Contacting with phenol-formaldehyde polymers for salt formation and as ligands |
| 08/04/1998 | US5788937 Method for the recovery of silver value from aqueous solution |
| 08/04/1998 | US5788844 Process for removing and recovering ammonia from organic metal extractant solutions in a liquid-liquid metal extraction process |
| 07/30/1998 | WO1998032885A1 Leached nanocrystalline materials, method for making them and uses in the energetic sector |
| 07/29/1998 | EP0854941A1 Electrochemical system |
| 07/29/1998 | EP0828552A4 Process for recovery of metal ions |
| 07/28/1998 | US5787332 Process for recovering tantalum and/or niobium compounds from composites containing a variety of metal compounds |
| 07/28/1998 | US5785935 Using liquid leachant |
| 07/28/1998 | US5785736 Elution from an ion exchange resins |
| 07/28/1998 | US5785735 Phytoremediation of metals |
| 07/28/1998 | US5785182 Portable finishing sluice |
| 07/28/1998 | CA2096605C Aqueous oxidation of sulfidic silver ore |
| 07/28/1998 | CA1339973C Process for the production of an electrolyte for the production of alkali dichromates and chromic acid |
| 07/23/1998 | WO1998031779A1 Separation of heavy metals and materials for use in this |
| 07/23/1998 | CA2277156A1 Separation of heavy metals and materials for use in this |
| 07/22/1998 | EP0854199A1 Decontamination of zinc-containing metallurgical residues by continuous electro-hydrometallurgical treatment in alkaline environment |
| 07/22/1998 | EP0853986A1 Separation of heavy metals and materials for use in this |
| 07/22/1998 | EP0853682A1 Process and apparatus for extracting metal |
| 07/22/1998 | EP0853648A1 Method for preparing inorganic pigments, resulting inorganic pigments, and apparatus therefor |
| 07/22/1998 | CN1188155A Method for extracting mixed rare earth oxide by salmiac roasting black weathering slime |
| 07/21/1998 | US5783062 Process for the treatment, by an electrochemical route, of compositions containing precious metals with a view to their recovery |
| 07/15/1998 | CN1187543A Non-toxic efficient gold extracting composition with oxidation chelation |
| 07/15/1998 | CN1039135C Extracting agent and application for extracting gold and palladium |
| 07/15/1998 | CN1039112C Comprehensive utilization method for decomposition of B-Mg-Fe ore with sulfuric acid |
| 07/14/1998 | US5779997 Method for preventing the formation of jarosite and ammonium and alkali based double salts in solvent extraction circuits connected to acidic leaching processes |
| 07/14/1998 | US5779762 Method for improving the heap biooxidation rate of refractory sulfide ore particles that are biooxidized using recycled bioleachate solution |
| 07/08/1998 | CN2285775Y Continuous gold extracting apparatus |
| 07/08/1998 | CN1187220A Chloride assisted hydrometallurgical extraction of metal |
| 07/08/1998 | CN1186866A Wet silver extracting process from silver ore with high manganese, sulphur and iron content |
| 07/07/1998 | US5776329 Method for the decomposition and recovery of metallic constituents from superalloys |
| 07/02/1998 | WO1998028454A1 Improvement in the process of recovery of metals |
| 07/01/1998 | EP0851035A1 Compositions for extracting transition metal and method for extracting transition metal using the same |
| 07/01/1998 | EP0851034A1 Method for processing zinc silicate-containing zinc crude material |
| 07/01/1998 | EP0850322A1 Selective separation of dissolved metal species with substituted 1,3,5 triazine extractants |
| 07/01/1998 | EP0601027B1 Titanium extraction |
| 07/01/1998 | CN1186524A Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulfide minerals |
| 07/01/1998 | CN1186523A Chloride assisted hydrometallurgical extraction of metal |
| 07/01/1998 | CN1186123A Extraction of gold from alkaline cyanide liquid |
| 06/30/1998 | US5772776 Process for the recovery of heavy metals such as lead from metal contaminated soil |
| 06/30/1998 | US5772730 Process for separating contaminants from organic phases during hydrometallurgical extraction of metals |
| 06/25/1998 | DE19653273A1 Recovery of at least one of the metals precipitated onto a substrate |
| 06/24/1998 | EP0758265B1 Reactor trays for a vertical staged polycondensation reactor |
| 06/24/1998 | CN1185486A Process for preparing industrial beryllium oxide and mixed rare-earth hydroxy compound by using silicon-beryllium-yttium ore |
| 06/23/1998 | US5770170 Recovery of zinc from sulphidic concentrates |
| 06/23/1998 | US5769925 Process for the elution of precious metals absorbed on active carbon |
| 06/23/1998 | CA2016562C Elution process for gold-iodine complex from ion-exchange resins |
| 06/23/1998 | CA2016561C Purification process for gold-bearing iodine lixiviant |
| 06/18/1998 | WO1998026100A1 Recovery of nickel from bioleach solution |
| 06/18/1998 | CA2193305A1 Process for removing and recovering copper, silver and zinc from sulfide ores |
| 06/17/1998 | CN1184855A Method for recovering rare-earth compounds |
| 06/16/1998 | US5766930 Method of biotreatment for solid materials in a nonstirred surface bioreactor |
| 06/16/1998 | US5766478 Water-soluble polymers for recovery of metal ions from aqueous streams |
| 06/16/1998 | CA2062350C Process for recovery of nickel and magnesium from a naturally occurring material |
| 06/11/1998 | WO1998024938A1 Extraction of metals from heavy metal-bearing wastes |
| 06/10/1998 | EP0846187A1 Recovery of elements involving a chemical processing step |
| 06/10/1998 | EP0720661B1 Process for the elution of precious metals adsorbed on active carbon |
| 06/10/1998 | CN1184162A Vanadium pentoxide extracting method from stone coal vanadium ore |
| 06/10/1998 | CN1184161A Extraction procedure for wet smelting process and its application in vanadium smelting |
| 06/09/1998 | US5763259 Bio-metallurgical process in which bio-oxidation of mineral compounds is produced |
| 06/09/1998 | US5762890 Zirconium and hafnium separation in chloride solutions using continuous ion exchange chromatography |
| 06/09/1998 | US5762683 Ferric fluoborate/organic extractant hydrometallurgical process for recovering metals |
| 06/03/1998 | CN1183479A Method for extracting gold by non-cyanide desorption |
| 06/02/1998 | US5759512 Regeneration of dithiophosphorus acid metal extractants |
| 06/02/1998 | US5759410 Process for recovering mercapto-s-triazines from silver precipitate |
| 06/02/1998 | US5759228 Nozzle for electric dispersion reactor |
| 05/28/1998 | WO1998022216A1 Production of aromatic carboxylic acids and recovery of co/mn cattalyst from ash |
| 05/27/1998 | EP0843741A1 Method for upgrading waste material comprising sheet metal with a zinc plating on at least one side thereof |
| 05/27/1998 | EP0713536B1 A process for recovering metals |
| 05/27/1998 | CN1038519C Method for recovering precious metals from carbonaceous ores |
| 05/26/1998 | US5758255 Opposite phase entrainment reduction in solvent extraction/electrowinning circuits by addition of water soluble cationic polymers |
| 05/26/1998 | US5756056 Process for recovering rare earth metal from oxide ore by concentration and separation |
| 05/14/1998 | WO1998019779A1 Improved leaching of mineral ores |
| 05/13/1998 | EP0840808A1 Method of purifying gold |
| 05/13/1998 | CN1181380A 2, 6-bis£(1 -phenyl -3 -methyl -5 -oxygen -4 -pyrazolinyl) formyl| pyridine and synthetic method and application thereof |
| 05/13/1998 | CN1038348C Prodn. of metal from minerals |
| 05/13/1998 | CN1038324C Method for enriching titanium dioxide by using titanium ore as raw material |
| 05/12/1998 | US5750081 Blend of supercritical fluid, complexer and conditioning agent |
| 05/12/1998 | US5750019 Process for hydrometallurgic and electrochemical treatment of sulfur antimony ores with production of electrolytic antimony and elemental sulfur |
| 05/12/1998 | US5749940 Method for producing high grade reduced silver |
| 05/12/1998 | US5749472 Dynamic mining system comprising hydrated multiple recovery sites and related methods |
| 05/07/1998 | WO1998018929A1 Nucleic acid sequences encoding citrate transporter proteins |
| 05/06/1998 | EP0839909A1 Nucleic acid sequences encoding citrate transporter proteins |
| 05/06/1998 | EP0809714A4 Modifiers for aldoxime extractant of metal values |
| 05/06/1998 | EP0808377A4 Treatment of titanium-containing material |
| 05/06/1998 | CN1180755A Pretreatment method before wet method acid immersion for lead anode mud |
| 05/06/1998 | CN1038261C Impregnation and extraction process for separation of cerium oxide and mixed low-cerium rare earth elements |
| 04/30/1998 | WO1998017363A1 Concentrated solutions of oxime metal extractants and method of formulating extractant compositions therefrom |
| 04/29/1998 | EP0692035B1 Recovery of cerium from fluoride-containing ores |
| 04/29/1998 | CN1038199C Method for recovery of platinum family metal from waste catalysts |
| 04/29/1998 | CN1038188C Preparation method of high-purity micro-fine rutile-type titanium dioxide |
| 04/28/1998 | US5744107 Process for removing heavy metals from soil |
| 04/28/1998 | CA2059428C Recovery of nickel from uranium containing ore |