| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
|---|
| 11/26/1992 | WO1992020826A1 Ion flotation of platinum ions |
| 11/25/1992 | EP0514473A1 Process for making finely divided particles of silver metal |
| 11/25/1992 | CN1066474A Superposition precipitating method for rare earth and apparatus thereof |
| 11/25/1992 | CN1066473A Efficient method for extracting china medical stone |
| 11/19/1992 | EP0513966A2 Bis-bibenzimidazole composition |
| 11/12/1992 | WO1992019551A1 Semi-continuous bacterial leaching process |
| 11/10/1992 | US5162106 Photographic fixer regeneration |
| 11/10/1992 | US5162105 Processes to recover and reconcentrate gold from its ores with microorganisms |
| 11/10/1992 | CA1309869C Method for production of gallium |
| 11/04/1992 | CN1065885A Method for recovery of lead from used battery |
| 11/03/1992 | US5160588 Process for recovering tellurium from copper electrolysis slime |
| 11/03/1992 | CA1309596C Rare earths liquid-liquid extraction separation process |
| 11/03/1992 | CA1309595C Rare earths liquid-liquid extraction separation process |
| 10/29/1992 | WO1992018654A1 Process for the treatment of ion flotation froths |
| 10/28/1992 | CN1065686A Extracting agent and application for extacting gold and palladium |
| 10/28/1992 | CN1065684A Gold extracting method by low-pressure hot acid immersing polyurethane foam |
| 10/27/1992 | US5158688 Process for removing inorganic gels and incompressible solids from acidic media |
| 10/27/1992 | US5158603 In presence of water insoluble weak organic acid |
| 10/27/1992 | CA1309259C Hydrometallurgical arsenopyrite process |
| 10/21/1992 | EP0509759A1 Recovery of abrasive grit with a nitric acid-containing medium. |
| 10/21/1992 | EP0270637B1 Manufacture of high purity zirconia from low-silica zirconiferous materials |
| 10/21/1992 | CN1065493A Method of extracting white arsenic by precipitation to remove impurities |
| 10/20/1992 | US5156824 Application of diphosphonic derivatives to cation exchange, new diphosphonic derivatives and production process therefor |
| 10/20/1992 | CA1308916C Thermophilic microbial treatment of precious metal ores |
| 10/16/1992 | CA2065964A1 Process using an acidic medium containing nitric acid |
| 10/15/1992 | WO1992017614A1 Copper ion flotation with cationic reagents |
| 10/14/1992 | EP0508960A1 A hydrometallurgical method of producing metallic lead from materials containing oxides, particularly from the active material of accumulators |
| 10/14/1992 | CN2118738U Reaction apparatus for extraction of gold |
| 10/13/1992 | US5154899 Metal recovery from porous materials |
| 10/13/1992 | US5154757 Method of making pure cobalt metal powder substantially free of divalent cationic impurities |
| 10/06/1992 | US5152969 Processes to recover and reconcentrate gold from its ores with microorganisms |
| 10/01/1992 | WO1992016667A1 Oxidation of metal sulfides using thermotolerant bacteria |
| 09/23/1992 | EP0505277A1 Method for separating iron and/or zirconium from actinides and/or lanthanides present in an aqueous acid solution using a propane diamide |
| 09/22/1992 | US5149845 Hydoxamate |
| 09/16/1992 | CN2116011U Tower-type immersing-by-grinding machine |
| 09/16/1992 | CN1064505A High-efficient composite v-extracting solvent |
| 09/10/1992 | DE4207137A1 Sepg. rhenium from acid soln. contg. molybdenum - using resin or solvent fixing agent which is treated with basic soln. to recover the rhenium |
| 09/07/1992 | CA2062146A1 Process for separating rhenium from acid solutions containing molybden |
| 09/06/1992 | WO1992015713A1 Process for recovery of metal |
| 09/06/1992 | CA2105586A1 Process for recovery of metal |
| 09/03/1992 | WO1992014865A1 Mineral recovery apparatus |
| 09/03/1992 | WO1992014850A1 Process and device for removing metal from flue dust |
| 09/03/1992 | WO1992014848A1 Biological processes for recovering heavy metals |
| 09/03/1992 | WO1992014682A1 Bacterial leaching process |
| 09/02/1992 | CN1064110A Process for treatment of ores containing rare earths |
| 09/02/1992 | CN1064109A Process for treatment of ores containing rare earths |
| 09/02/1992 | CA2062035A1 Bis-bibenzimidazole composition |
| 09/01/1992 | US5143543 Aeration biological medium in the biological leaching of an ore |
| 08/26/1992 | CN1017983B Clustering method for fractional distillation extraction of gadolinium, terbium, dysprosium and yttrium |
| 08/25/1992 | CA1306613C Recovery of gold from aqueous solutions |
| 08/20/1992 | DE4105058A1 Verfahren zum abtrennen von metall aus flugstaub A method of separated metals from fly dust |
| 08/19/1992 | CN1063718A High-purity rare-earth preparing method by separating beavy metal impurity |
| 08/19/1992 | CN1017887B Obtaining lanthanides by extraction and separation of solvent |
| 08/18/1992 | US5139752 Pulverizing ore, complexing metal, dissolving complex |
| 08/12/1992 | EP0498024A1 Process and apparatus for extracting metals from rocks and deposits |
| 08/12/1992 | EP0355159B1 Mixing-settling apparatus for liquid-liquid extraction |
| 08/12/1992 | CN1063509A Technological process of reductive extraction for high purity europium |
| 08/06/1992 | DE4103172A1 Sepg. metals from rocks and deposits, etc. - by pressure feed of ground material with solvent and carrier gas to an eddy chamber |
| 08/05/1992 | CN2111957U Eccentric lift leg concave angled sieve pulp adsorption bed |
| 07/29/1992 | EP0236480B1 Production of hydrogen by deserpentinization of ultramafic rock |
| 07/29/1992 | CN1017631B Indium recovery technology from ferrous solution with high-indium content |
| 07/29/1992 | CN1017630B Method of chlorine gas selecting infusion nickel |
| 07/28/1992 | US5133846 Silver recovery device |
| 07/22/1992 | CN1062930A Recovery method for copper from waste etching solution |
| 07/21/1992 | US5132092 Process for the extraction of uranium (vi) and/or plutonium (iv) present in an acid aqueous solution by means of a mixture of n,n-dialkyl amides usable for the reprocessing of irradiated nuclear fuels |
| 07/21/1992 | US5131943 Process for the separation of precious group VIII a metals from cyano complexes of such metals and other metals |
| 07/15/1992 | EP0333796B1 Process and device for processing hydroxide sludges |
| 07/15/1992 | EP0294387B1 Method and apparatus for biological processing of metal-containing ores |
| 07/15/1992 | CN1062712A Oxide micropowder made by colloid combined precipitation method |
| 07/08/1992 | EP0463062A4 Bioslurry reactor for treatment of slurries containing minerals, soils and sludges |
| 07/08/1992 | CN1062555A Technology for extraction and recovery of gold and silver |
| 07/07/1992 | USH1074 Bacterio-electric leaching of metals |
| 07/07/1992 | US5127942 Recovering gold and silver from refractory carbonaceous sulfidic material |
| 07/01/1992 | CN1062302A Magnetic carbon and process for extracting gold with magnetic carbon as adsorbent |
| 07/01/1992 | CN1017262B Gold reclaiming and extraction with activated carbon fibre |
| 07/01/1992 | CN1017261B Stocking impregnation technology for ion-adsorption type of rare-earth minerals |
| 07/01/1992 | CN1017216B Recovery of noble metals |
| 07/01/1992 | CN1017215B Process for recovery of gallium using liquid-liquid extraction |
| 06/25/1992 | DE4041773A1 Copolymers of bis:imidazole monomers and olefinic comonomers - useful for sepn. of noble metals, esp. platinum@, palladium@ and rhodium, from aq. soln., from one another and from heavy metals |
| 06/24/1992 | EP0490893A1 Method for separating interfering elements from valuable metal electrolyte solutions |
| 06/24/1992 | EP0450047A4 Polymer bead containing immobilized metal extractant |
| 06/24/1992 | CN1062175A Method for producing silver nitrate and reclaiming copper, lead and antimony from lead anode mud |
| 06/24/1992 | CN1017123B Prepn. of ultrafine trngsten powder |
| 06/23/1992 | US5124008 Multistep processing in definite sequence; recycling all reactants and reagents; heat recovery |
| 06/17/1992 | EP0490128A2 Zirconium-hafnium production in a zero liquid discharge process |
| 06/17/1992 | CN2107473U Mine slurry absorption separation groove |
| 06/17/1992 | CN1062004A Process for preparing zinc oxide |
| 06/16/1992 | US5122241 Process for the hydrometallurgical treatment of a solution of materials containing gallium |
| 06/16/1992 | CA1303327C Production of pure magnesium chloride solution from siliceous magnesiumminerals |
| 06/15/1992 | CA2032357A1 Pressure oxidation methods for gold extraction and toxic waste treatment |
| 06/14/1992 | CA2057185A1 Treatment of metal bearing mineral material |
| 06/10/1992 | EP0489258A1 A bio-metallurgical process in which bio-oxidation of mineral compounds is produced |
| 06/10/1992 | EP0449942A4 Phosphonic acids and their uses in separation |
| 06/10/1992 | CN1016970B Cl-carrier chlorination process for extracting au and ag |
| 06/09/1992 | US5120523 Method for dissolution of metal |
| 06/09/1992 | US5120441 Method for removal of metal atoms from aqueous solution using suspended plant cells |
| 06/09/1992 | US5120409 Anodic dissolving, electrolytic separation |
| 06/09/1992 | US5120353 Hydrometallurgic method for processing raw materials containing zinc sulphide |
| 06/08/1992 | WO1992010263A1 Method and apparatus to detoxify aqueous based hazardous waste |
| 06/08/1992 | CA2097520A1 Method and apparatus to detoxify aqueous based hazardous waste |