| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 05/05/1993 | CN2131870Y Gas-floating substitution device stirred with hydrogen |
| 05/05/1993 | CN1071605A Process for recovering rhodium from reaction products of oxo synthesis |
| 05/04/1993 | US5207996 Acid leaching of copper ore heap with fluoroaliphatic surfactant |
| 05/04/1993 | US5207995 Recovery of cerium from fluoride-containing ores |
| 05/04/1993 | CA1317233C Fluid/solid contacting columns |
| 04/29/1993 | WO1993008310A1 Extraction or recovery of metal values |
| 04/29/1993 | CA2119240A1 Extraction or recovery of metal values |
| 04/28/1993 | EP0538732A1 Process for the recovery of rhodium from reaction products of oxosynthesis |
| 04/28/1993 | EP0386205B1 Improved process for obtaining impurity-free compounds of ta and/or nb from materials containing these metals |
| 04/28/1993 | CN1071465A Gold-extracting process with liquid film of soaking while grinding |
| 04/28/1993 | CN1020381C Conversion treatment of lead-base gold or lead ores with soda |
| 04/27/1993 | US5206000 Process for the recovery of rhodium from aqueous solutions containing rhodium complexes |
| 04/25/1993 | CA2080747A1 Process for recovering rhodium from the reaction products of the oxo synthesis |
| 04/21/1993 | EP0538168A1 Process for the recovery of non ferrous metal values from pyrite cinders |
| 04/20/1993 | US5204074 Recovery of gallium values from basic aqueous solutions thereof |
| 04/15/1993 | WO1993006952A2 Process for removing heavy metals from soils |
| 04/15/1993 | DE4133400A1 Sepg. metals e.g. copper@ and noble metals form solns. - by means of dissolved hydrogen@ in loop reactor, for use e.g. in galvanising installations |
| 04/15/1993 | CA2119021A1 Process for removing heavy metals from soil |
| 04/14/1993 | EP0536914A1 Acid leaching of copper ore heap with fluoroaliphatic surfactant |
| 04/14/1993 | CN1070836A Electrostatic quast liquid membrane efficient concentration flow path |
| 04/13/1993 | US5201942 Recovery of rhodium |
| 04/07/1993 | CN1070691A Recovery of metal values from aqueous solutions |
| 04/07/1993 | CN1070586A Pre-separation output-increasing extraction |
| 04/06/1993 | US5200383 Method for the production of catalytically active mixed phases |
| 04/06/1993 | US5200159 Purified solution containing iron and manganese, and method producing thereof |
| 04/01/1993 | WO1993006254A1 Process for the removal of salts from aluminum dross |
| 04/01/1993 | CA2120024A1 Process for the removal of salts from aluminum dross |
| 03/30/1993 | US5198021 Ion exchange resin adsorption |
| 03/24/1993 | EP0533224A2 Processing complex mineral ores |
| 03/24/1993 | CN1070229A Process for extracting gold and recovering sodium cyanide by emulsifying liquid film method |
| 03/23/1993 | US5196095 Process for recovering a metal from an aqueous solution comprising a mixture of metal chlorides |
| 03/23/1993 | US5196052 Oxidation, solubilization of metal from a refractory ore |
| 03/09/1993 | US5192443 Using phosphorous oxide derivatives as extractants for rare earth nitrates |
| 03/04/1993 | WO1993004208A1 Copper recovery process |
| 03/04/1993 | WO1993004207A1 Zirconium extraction |
| 03/04/1993 | WO1993004206A1 Titanium extraction |
| 03/04/1993 | CA2115423A1 Titanium extraction |
| 03/04/1993 | CA2115421A1 Zirconium extraction |
| 03/04/1993 | CA2115160A1 Copper recovery process |
| 03/03/1993 | CN1069524A Method for recoverying germanium from offscum containing germanium |
| 03/02/1993 | US5190578 Method for hydrometallurgical processing of friable concentration products |
| 02/24/1993 | EP0528361A1 Improved method of tellurium separation from copper electrorefining slime |
| 02/24/1993 | EP0527908A1 New formulations for iron oxides dissolution |
| 02/23/1993 | US5188735 Separation of rare earth values by liquid/liquid extraction |
| 02/23/1993 | US5188713 Using ammonium nitrate, electrowinning; temperature control |
| 02/23/1993 | US5188662 Silver recovery process |
| 02/17/1993 | EP0527685A1 Process for the separation of the actinides from lanthanides by selective extraction of the actinides in an organic solvent comprising a propane diamide |
| 02/17/1993 | CN2127086Y Wet multi-purpose tower for metallurgy ( chemical ) |
| 02/16/1993 | CA1313584C Process for the production of high-grade titanium dioxide by sulfate method |
| 02/10/1993 | EP0526469A1 Metal extraction by ion exchange |
| 02/04/1993 | WO1993002391A1 Treatment of photographic effluent |
| 02/04/1993 | WO1993002047A1 N-ethyl hydroxamic acid chelants |
| 02/03/1993 | EP0525125A1 Method for stripping metals in solvent extraction |
| 02/02/1993 | US5183940 Poly-(n-[2-hydroxybenzyl])-1,2-diaminoethanes |
| 01/30/1993 | CA2074710A1 Processing complex mineral ores |
| 01/27/1993 | EP0524782A2 Treatment of copper sulfide concentrates |
| 01/26/1993 | CA1313023C Process for treating zinc oxide bearing materials |
| 01/21/1993 | WO1993001320A1 Recovery of nickel |
| 01/21/1993 | CA2113086A1 Recovery of nickel |
| 01/20/1993 | EP0523124A1 A process for recovering a metal from an aqueous solution comprising a mixture of metal chloride |
| 01/20/1993 | CA2067472A1 Treatment of copper sulfide concentrates |
| 01/19/1993 | US5180526 From extraction of uranium ores; washing followed by ion exchange |
| 01/19/1993 | CA1312842C Extraction of noble metal in alternating field from ore slurry |
| 01/13/1993 | EP0522978A1 Biooxidation process for recovery of metal values from sulfur-containing ore materials |
| 01/13/1993 | EP0522234A1 Method for extracting rare-earth elements from phosphate ore |
| 01/13/1993 | CN1067927A Gold and palladium recovery from waste catalyst and liquid carrying valve |
| 01/13/1993 | CN1067926A Platinum recovery from waste catalyst |
| 01/13/1993 | CN1067925A Method for recovery of palladium from waste pd-c catalyst and its incinerator system |
| 01/12/1993 | US5178842 Method for precipitating and separating metals |
| 01/12/1993 | US5178665 Precipitation, heating; purification |
| 01/12/1993 | CA1312624C Extraction of metals |
| 01/10/1993 | CA2046583A1 Total gold by cgl |
| 01/05/1993 | US5176878 Zirconium-hafnium separation process |
| 01/05/1993 | US5176843 Composition and use of the composition for the extraction of metals from aqueous solution |
| 01/05/1993 | US5176802 Treatment of copper sulfide concentrates |
| 01/05/1993 | CA1312207C Recovery of germanium from aqueous solutions by solvent extraction |
| 12/30/1992 | CN1067454A Process to produce copper sulfate with copper ore |
| 12/30/1992 | CN1019670B Silver recovering method and equipment from waste water in film developing and printing factory |
| 12/30/1992 | CN1019639B Solvent extraction |
| 12/29/1992 | WO1993000610A1 Silver recovery process |
| 12/29/1992 | US5174917 Compositions containing n-ethyl hydroxamic acid chelants |
| 12/29/1992 | US5174812 Separation and recovery of nickel and cobalt in ammoniacal systems |
| 12/25/1992 | CA2072188A1 Metal recovery process |
| 12/23/1992 | CN1067271A Process for extracting au or ag using mixture of lime and sulfur |
| 12/23/1992 | CN1067270A Process for compounding mixture of lime and sulfur for extracting au or ag |
| 12/23/1992 | CN1067269A Wet process for directly producing cuso4 from delafossite |
| 12/22/1992 | US5173247 Polystyrene support particles, steel ion exchanger |
| 12/22/1992 | US5173210 Composition and use |
| 12/22/1992 | CA1311619C Use of citric acid partial esters for the extraction of iron |
| 12/20/1992 | WO1992022673A1 Method for processing complex metal sulphide materials |
| 12/20/1992 | CA2102791A1 Method for processing complex metal sulphide materials |
| 12/16/1992 | EP0517786A1 Production of synthetic rutile |
| 12/16/1992 | EP0289537B1 Process for the production of zirconium sulphate |
| 12/15/1992 | US5171546 Use of thioether ligands for separating palladium from aqueous solutions and in particular nitric solutions for dissolving irradiated nuclear fuel elements |
| 12/09/1992 | EP0516763A1 Deoxidation of a refractory metal |
| 12/08/1992 | US5169609 Using crown ether and an alkyl(phenyl-)-N,N-dialkylcarbamoyl-methylphosphine oxide, strip with tetrahydrofuran-2,3,4,5-tetracrboxylic acid |
| 12/08/1992 | US5169503 Solubilization using aqueous mixture of chloride, hypochlorite, and cyanuric acid |
| 12/07/1992 | CA2070723A1 Glandox: extraction of metal values from metal bearing ores |
| 12/07/1992 | CA2070721A1 Mic oxygenation: extraction of metals values from metals bearing ores |
| 12/01/1992 | US5167938 Process for strontium-82 separation |