| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 09/30/1993 | WO1993019398A2 Composition for removing adhesives from polymeric film and process for using same |
| 09/30/1993 | WO1993019212A2 Recovery of precious metal |
| 09/30/1993 | WO1993019184A1 Biological process for recovery of plutonium from contaminated soils |
| 09/30/1993 | WO1993012260A3 Asymmetric ligands useful for transition metal catalyzed bond forming reactions |
| 09/30/1993 | WO1993010271A3 Improvement of the reduction process in p content and other gangues in iron ore and its agglomerates |
| 09/29/1993 | EP0562709A2 Process for stripping metals from organic complexes |
| 09/28/1993 | US5248441 Process for the recovery of copper from copper-containing industrial waste waters |
| 09/28/1993 | US5248329 Bacillus |
| 09/22/1993 | EP0560877A1 Method and apparatus to detoxify aqueous based hazardous waste |
| 09/22/1993 | CN1076494A Metallurgical method for recovering copper from copper oxide ore by wet process |
| 09/22/1993 | CN1076493A Extraction of ammonium para-tungstate and tin dioxide by use of tungsten-tin paragenetic ore wet process |
| 09/21/1993 | US5246684 Efficiency |
| 09/21/1993 | US5246486 Leaching |
| 09/21/1993 | US5246481 Production of metallic powder |
| 09/21/1993 | CA2063694A1 Ammonia extraction of gold and silver from ores and other materials |
| 09/21/1993 | CA2063687A1 Bioleaching method for the extraction of metals from coal fly ash using thiobacillus |
| 09/15/1993 | CN1076135A Autocontrol method for fractional extraction process |
| 09/14/1993 | US5244493 Biometallurgical treatment of precious metal ores having refractory carbon content |
| 09/14/1993 | US5244491 Continuous, solvent extraction, ammonia, bis/2-ethylhexyl/ phosphate |
| 09/08/1993 | EP0559561A1 Process for the dissolution of plutonium dioxide with OH'radicals obtained by the radiolysis of water, usable for treating plutonium containing slimes and wastes |
| 09/08/1993 | EP0559537A1 Process for the separation of elements from aqueous solutions coming from the reprocessing of nuclear fuel |
| 09/04/1993 | CA2090812A1 Process for the separation of certain elements from aqueous solutions resulting from the reprocessing of spent nuclear fuels |
| 09/02/1993 | WO1993017134A1 Process for separating disturbing elements from solutions of valuable metals |
| 09/01/1993 | EP0557274A1 Recovery of palladium. |
| 08/26/1993 | DE4204994A1 Verfahren zur abtrennung von stoerelementen aus wertmetall-loesungen A method for segregation of interfering elements from valuable metals-loesungen |
| 08/26/1993 | CA2090062A1 Chemical process |
| 08/24/1993 | US5238663 Nickel recovery process |
| 08/24/1993 | US5238662 Processes for recovering precious metals |
| 08/24/1993 | US5238489 Selectively dissolving mixture of alloy particles, froth flotation, separation |
| 08/19/1993 | WO1993016204A2 Process and apparatus for extracting solutes from their aqueous solutions |
| 08/19/1993 | DE4204870A1 Disposing of soil or water loaded with arsenic - by passing soln. through anion exchange resin, eluting resin to recover arsenic, sepg. arsenic from eluate and regenerating resin |
| 08/17/1993 | US5236676 Pressure chlorination of refractory gold ores |
| 08/17/1993 | US5236492 Recovery of precious metal values from refractory ores |
| 08/17/1993 | US5236491 Contacting with selective anionic resin; maintaining pH between 4.0 and 5.5; elution with mineral acid; treating eluate |
| 08/11/1993 | EP0555128A1 Recovery of molybdenum and vanadium from used catalysts |
| 08/11/1993 | CN1075171A Production process of cerium hydroxide |
| 08/11/1993 | CN1075170A Chlorination leaching process for refractory copper oxide ore |
| 08/10/1993 | CA1321076C Gallium recovery process by liquid-liquid extraction |
| 08/05/1993 | WO1993015236A1 Method for separating iron from an aqueous solution |
| 08/04/1993 | CN2139470Y Solid-solid-liquid system suction cascade shape stirring adsorber |
| 08/04/1993 | CN1074947A Wet desulfuration of sulfurous iron ore slag and process for extracting associated valuable metals |
| 08/04/1993 | CN1074945A Preparation of colloidal antimony pentoxide by chlorination hydrolysis process |
| 08/03/1993 | US5232490 Oxidation/reduction process for recovery of precious metals from MnO2 ores, sulfidic ores and carbonaceous materials |
| 08/03/1993 | US5232488 Cooling, mixing with sodium thiocyanate solution with activated carbon producing tailings, filtration, collecting condensates, filtrates and tailings, combining to form slime then refining |
| 07/27/1993 | US5231018 Rhodococcus cultured on fly ash for extraction of metal oxides with adsorption and agglomeration |
| 07/21/1993 | EP0551593A1 Process for the separation of rhodium from organic solutions |
| 07/21/1993 | CN1074487A Emulsion-removing method in the process of extraction |
| 07/21/1993 | CN1074486A Chemical sorting method of wulfenite |
| 07/21/1993 | CN1021657C Transition metal recovery |
| 07/20/1993 | US5229088 Using spent hydrorefining catalyst containing iron and sulfur |
| 07/20/1993 | US5229086 Solvent extraction |
| 07/20/1993 | US5229003 Recovery of base materials from geothermal brines |
| 07/20/1993 | US5228903 Method for stripping metals in solvent extraction |
| 07/16/1993 | CA2077488A1 Process for the separation of rhodium from organic solutions |
| 07/14/1993 | EP0517786A4 Production of synthetic rutile |
| 07/13/1993 | US5227143 Process for the removal of salts from aluminum dross |
| 07/13/1993 | US5227136 Bioslurry reactor for treatment of slurries containing minerals, soils and sludges |
| 07/07/1993 | CN1073986A Process for the recovery of noble metals and tertals and tertiary phosphines |
| 07/07/1993 | CN1073985A Method for agglomeration of gold and its coenobiums by coal-oil ploymers |
| 07/07/1993 | CN1073984A Method for recovering low-concentration gold |
| 07/07/1993 | CN1073983A Technology for raising yield rate of rare-earth products produced with sulfuric acid process |
| 07/06/1993 | US5225173 Chelation, crown ethers |
| 07/06/1993 | CA1319826C Treatment of sulphuric acid solutions containing tellurium, copper sulphate and minor impurity elements |
| 06/30/1993 | EP0548538A1 Transition metal decontamination process |
| 06/29/1993 | US5223232 Solvent extraction of solutions from irradiated nuclear fuel reprocessing plants |
| 06/29/1993 | US5223023 Recovery of gold from solution by reduction-precipitation with stabilized alkali metal borohydride |
| 06/24/1993 | WO1993012260A2 Asymmetric ligands useful for transition metal catalyzed bond forming reactions |
| 06/23/1993 | EP0547744A1 Process for recovering metal from oxide ores |
| 06/22/1993 | US5221480 Concurrent removal of various organics and heavy metals |
| 06/22/1993 | US5221327 Culturing a magnanese reducing Bacillus species in growth medium, contacting ore with culture, solubilizatin of ore to obtain liquid and residue portion, recovery of metals from liquid portion |
| 06/22/1993 | CA1319453C Method for removal of organic solvents from aqueous process streams |
| 06/16/1993 | EP0546153A1 Silver recovery process |
| 06/16/1993 | CN1073214A Wet gold purifying technology |
| 06/09/1993 | CN1072961A Method for extracting quality copper sulphate by utilization of multi-impurity low-grade copper oxide ore |
| 06/08/1993 | US5217615 Bacterial leaching process and composition |
| 06/08/1993 | US5217585 Transition metal decontamination process |
| 06/08/1993 | CA1318791C Leaching aid during a ferric chloride leach of a metal-sulphide bearing material |
| 06/05/1993 | WO1993011113A1 Process for the selective extraction of actinides (iii) by means of nitrogenous heterocyclic substituant amides |
| 06/02/1993 | CN1072728A Electrode potential electrolytic method |
| 06/02/1993 | CN1021059C Treatment method for lower grade goldmine |
| 06/02/1993 | CN1021038C Method for producing soluble silicate from bio-silicon dioxide |
| 06/01/1993 | US5215575 Recovery of gold, silver and platinum group metals with various leachants at low pulp densities |
| 06/01/1993 | US5215574 Method of improving precious metal yield in a Merrill-Crowe recovery process |
| 05/27/1993 | WO1993010271A2 Improvement of the reduction process in p content and other gangues in iron ore and its agglomerates |
| 05/27/1993 | WO1993010038A1 Regeneration of hydrochloric acid |
| 05/27/1993 | WO1993006952A3 Process for removing heavy metals from soils |
| 05/27/1993 | DE4216540C1 Recovery of nickel and magnesium from natural substances |
| 05/27/1993 | DE4207547A1 Recovery of copper@ from combustion residues - by extraction with polyfunctional aliphatic amine(s) followed by electrolysis |
| 05/26/1993 | CN1072461A Combined transuranic-strontium extraction process |
| 05/26/1993 | CN1020925C Reduction medium for silver recovery bucket |
| 05/25/1993 | US5213777 Extraction of uranium values using an imidazole extractant |
| 05/19/1993 | CN1020757C Process for recovery of gallium using liquid-liquid extraction |
| 05/19/1993 | CN1020711C Process for recovery of germanium from solutions containing germanium |
| 05/18/1993 | US5211745 Nickel processing |
| 05/13/1993 | WO1993009223A1 Method of geochemical prospecting |
| 05/12/1993 | CN1071975A Process and special electrode for producing electrolytic metal mn from manganese rich slag and mncl2-nh4cl system |
| 05/12/1993 | CN1071964A Method for multistage fractional extraction of americium and rare-earth elements without use of complexant |
| 05/11/1993 | US5209911 Method of making metal stannates |
| 05/11/1993 | CA2000832C Process for producing alumina from gibbsitic bauxites |
| 05/11/1993 | CA1317592C Macrocyclic ligands bonded to sand or silica gel and their use in selectively and quantitatively removing and concentrating ions present at low concentrations from mixtures thereof with other ions |