| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 06/04/1992 | DE4137284A1 Emission-free combustion of materials contg. toxic substances - combustion gases are circulated between combustion chamber and absorption plant in which they are cleaned and emission of dangerous substances to atmos. is avoided |
| 06/03/1992 | CN2106178U Boiling soak device |
| 06/02/1992 | US5118478 Extractrion process for removing and recovering metals from aqueous solutions |
| 06/02/1992 | US5118344 From silver halide emulsion |
| 05/27/1992 | EP0487379A2 Method of anti-pollution treatment of a used refining catalyst and complete recuperation of the different metal constituents of this catalyst |
| 05/27/1992 | EP0487368A2 Antipolluting treatment of a used refining catalyst and recuperation of metals |
| 05/27/1992 | CN1061439A Technology for separation of zirconium and hafnium by distillation and extraction with trioctylamine |
| 05/20/1992 | CN1061246A Method of extracting and separating zirconium from scandium oxide |
| 05/20/1992 | CN1016707B Dissolution and purification of crude rhodium and high rhodium-containing alloy waste |
| 05/20/1992 | CN1016679B Extraction of rare-earth elements by circulating oxalic acid |
| 05/19/1992 | US5114687 Using ammonia and ammonium salts for extraction followed by oxidation and heating |
| 05/19/1992 | US5114473 Transition metal recovery |
| 05/19/1992 | CA1301097C Microorganism for use in industrial processes |
| 05/16/1992 | WO1992008812A1 Base metals recovery by adsorption of cyano complexes on activated carbon. |
| 05/16/1992 | CA2096249A1 Base metals recovery by adsorption of cyano complexes on activated carbon |
| 05/15/1992 | WO1992008813A1 Recovery of palladium |
| 05/15/1992 | CA2096232A1 Recovery of palladium |
| 05/13/1992 | CN1061045A Method of non-poisonous technology for extracting gold |
| 05/13/1992 | CN1061044A Reclaiming au, pt, pd and te from copper anode mud |
| 05/13/1992 | CA2055280A1 Process for antipollution treatment of a spent refining catalyst and total recovery of different metal constituents of said catalyst |
| 05/12/1992 | US5112493 Zirconium-hafnium production in a zero liquid discharge process |
| 05/12/1992 | US5112390 Replaceable core silver recovery equipment and method of making and using |
| 05/06/1992 | EP0483266A1 Method of making metal stannates |
| 05/06/1992 | CN1060876A Preparation method of samarium oxide |
| 05/06/1992 | CN1060875A Process for recovering gold from overflow water of gold mine's tailing store |
| 05/06/1992 | CA2054318A1 Use of microwave radiation to eliminate foam in ore leaching |
| 05/05/1992 | US5110354 Closed loop copper cell extraction process |
| 05/01/1992 | CA2054510A1 Process for antipollution treatment of a spent refining catalyst and recovery of metals |
| 04/30/1992 | WO1992007106A1 Method of recycling phosphating sludges |
| 04/29/1992 | EP0482160A1 Method for removing cadmium for phosphoric acid |
| 04/28/1992 | US5108721 Leaching in dilute sulfuric acid to solubilize nickel, leaching again to solubilize copper and tellurium |
| 04/23/1992 | DE4033173A1 Di:alkyl-aminoalkyl sulphide cpds. - used for extn. of rhodium pref. from aq. soln. contg. chloride ions, giving high selectivity |
| 04/23/1992 | DE4032956A1 Verfahren zum recycling von phospatierschlamm Method for recycling phospatierschlamm |
| 04/21/1992 | CA1298976C Recovery of noble metals |
| 04/15/1992 | EP0479814A1 Dissolving values of platinum group metals from ores and concentrates. |
| 04/14/1992 | US5104445 Extracting metals from ore by contacting with a solid salt to obtain a mixture, heating and chlorination and recovering the metals |
| 04/07/1992 | US5102104 Biological conversion apparatus |
| 04/01/1992 | CN1059938A Wet preparing silver nitrate with anode mad of electrolytic lead |
| 03/31/1992 | US5101066 Hydroxamate ion binders |
| 03/31/1992 | US5100585 Nuclear reactor by-product, crown ethers in diluents |
| 03/30/1992 | CA2052407A1 Cleaning of solutions of alkylphosphates |
| 03/25/1992 | EP0476079A1 Method for cleaning and recovering metal mercury from roasting gases containing it |
| 03/25/1992 | CN1059762A Technology of v2o5 production by chloric acid chlorination method |
| 03/24/1992 | CA1297680C Method for recovering vanadium from residues from the combustion of petroleum fractions |
| 03/19/1992 | WO1992004474A1 Removal of molybdenum from uranium-bearing solutions |
| 03/18/1992 | EP0475308A1 Method for treating nickel magnesium silicate ores |
| 03/18/1992 | EP0475289A1 Method of recovering nickel |
| 03/18/1992 | CN1015912B Extracting and emulsifying method by eliminating iridium concentrate acid solution |
| 03/17/1992 | US5096486 Treatment of metal bearing mineral material |
| 03/14/1992 | CA2051016A1 Nickel recovery process |
| 03/13/1992 | CA2050945A1 Method for treating nickel magnesium silicate ores |
| 03/11/1992 | CN1015801B Preparation method of high purity yttrium oxide and lanthanum oxide |
| 03/03/1992 | US5093090 Process for separating antimony from acidic solutions containing same with an organic diluent containing a polyol |
| 02/26/1992 | EP0471715A1 Process for two-phase extraction of metallic ions from phases containing solid metallic oxides, agent and use. |
| 02/26/1992 | CN1058995A Centrifugal extraction of rare-earth mother liquid with naphthenic acid |
| 02/26/1992 | CN1058994A One-step extracting and seperating pure yttrium, crude erbium and heavy rare-earth |
| 02/26/1992 | CN1058993A Silver extraction from tin anode mud containing low silver content |
| 02/25/1992 | US5091546 Novel rhodium recovery |
| 02/25/1992 | US5091350 Extracting with aqueous solution of organic phosphine sulfonate or carboxylate and solubilizer |
| 02/25/1992 | US5091160 Use of microwave radiation to eliminate foam in ore leaching |
| 02/18/1992 | US5089412 Chemical/biological leaching; three types bacteria, mainly L. ferrooxidans |
| 02/12/1992 | CN1058617A Method for recovery of ge from solution |
| 02/11/1992 | US5087370 Method and apparatus to detoxify aqueous based hazardous waste |
| 02/11/1992 | CA1295486C Extraction of transition metals from organic solutions |
| 02/05/1992 | EP0468978A1 Process for recovering germanium. |
| 02/05/1992 | CN1058350A Multi-tank electrostatic quasi-liquid-film separator |
| 02/04/1992 | US5085835 Oxidation of rhodium complex in presence of water soluble salt of a carboxylic acid; recovering aswater insoluble precipitate |
| 02/04/1992 | US5085834 Method for separating by using crown compounds plutonium from uranium and from fission products in the initial stages for the reprocessing of irradiated nuclear fuels |
| 01/29/1992 | CN1058232A Method for extracting neodymium from neodymium-iron-boron waste material |
| 01/29/1992 | CN1058231A Alkoxyl-alkyl phosphonic acid monoalkyl ester extractant and method for separating rare earth elements |
| 01/28/1992 | US5084389 Reacting a biomass, hydrolysis and filtration |
| 01/28/1992 | CA1294761C Apparatus for treatment of ore particles |
| 01/26/1992 | CA2041719A1 Process for the enhanced production of silver from gold and silver bearing ore |
| 01/21/1992 | US5082638 Process of recovering non-ferrous metal values, especially nickel, cobalt, copper and zinc, by using melt and melt coating sulphation, from raw materials containing said metals |
| 01/21/1992 | US5082493 Processing of carbon steel furnace dusts |
| 01/15/1992 | WO1992001819A1 Method for the solvent extraction of palladium from aqueous solutions |
| 01/15/1992 | EP0466223A1 Process for treating fine particles coming from electrofilters used in mineral oil-cooled power transformer installations |
| 01/15/1992 | CN1057865A Method of extracting silver and gold from the anode argillaceous nitric acidic residue of tin soldering |
| 01/15/1992 | CA2080686A1 Method for the solvent extraction of palladium from aqueous solutions |
| 01/07/1992 | US5078894 Formulations for iron oxides dissolution |
| 01/02/1992 | EP0463674A2 Process for removing cadmium from phosphoric acid streams |
| 01/02/1992 | EP0463062A1 Bioslurry reactor for treatment of slurries containing minerals, soils and sludges. |
| 01/01/1992 | CN1015268B Fragmentation dissolving methof of noble metal |
| 12/31/1991 | US5076927 Fermentation by sulfur reducing bacteria; sulfiding, methanati on |
| 12/27/1991 | EP0335934B1 Process for producing pulverulent mixed phases with a catalytic action |
| 12/25/1991 | CN1057298A Process for extracting gallium from circulating mother solution in aluminium oxide processing procedure |
| 12/24/1991 | US5074911 Extracting metal values from aqueous solution with immiscible solvent and dissolved heterocyclic thione |
| 12/24/1991 | CA1293521C Controlled percolation system and method for heap leach mining |
| 12/17/1991 | US5073354 Recovering the metal cyanide complex by desorbing with aqueous solution of benzoic acid and polyacrylic acids |
| 12/11/1991 | CN1056906A Manufacturing two-valence europium by electrolysis reduction |
| 12/10/1991 | US5071989 Ionophores |
| 12/10/1991 | US5071476 Recovery silver from photo sensitive materials |
| 12/04/1991 | EP0459854A1 Use of thio-ether ligands for the isolation of palladium from aqueous solutions, particularly from nitric solutions of the irradiated nuclear fuel elements dissolution |
| 12/04/1991 | CN1056714A Use of thioether ligands for separating palladium from aqueous solutions |
| 12/04/1991 | CN1014976B High-purity terbium oxide preparation by use of fractional extraction method |
| 12/03/1991 | CA1292709C Chemical/biological process to oxidize multimetallic sulphide ores |
| 12/03/1991 | CA1292623C Extraction of metal values from ores or concentrates |
| 12/01/1991 | CA2043396A1 Method for removal of metal atoms and explosives from aqueous solution using suspended plant cells |
| 11/27/1991 | EP0458119A1 Process and apparatus for separating copper, in particular from cupric chloride etching solutions |
| 11/27/1991 | CN1056533A Extraction of gold by reduction with gem-amine-containing oximido material |