| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 01/20/1994 | WO1994001367A1 A method of obtaining lead and organolead from contaminated media using metal accumulating plants |
| 01/20/1994 | WO1994001190A1 Recovery of metal values from process residues |
| 01/20/1994 | WO1993023578A3 Process for the separation of cobalt from nickel |
| 01/20/1994 | CA2139642A1 Recovery of metal values from process residues |
| 01/20/1994 | CA2138979A1 A method of obtaining lead and organolead from contaminated media using metal accumulating plants |
| 01/18/1994 | US5279803 Precious metal recovery process from carbonaceous ores |
| 01/18/1994 | US5279802 Oxidation of metal sulfide at alkaline pH; complexing |
| 01/18/1994 | US5279745 Polysulfones impregnated with powdered activated carbo |
| 01/12/1994 | CN1080663A Treating process for tungsten mineral material soda high pressure leaching liquid |
| 01/11/1994 | US5278069 Demetallization with biosynthetic sulfuric acid |
| 01/11/1994 | US5277883 Recovery of metal values from aqueous solutions |
| 01/11/1994 | US5277882 Contacting at least one phosphorus-bearing acid |
| 01/11/1994 | CA1326006C Particulate material suitable for selectively separating metal cations from aqueous solutions, process for its production, and use thereof |
| 01/06/1994 | WO1994000608A1 Electrokinetic leaching |
| 01/06/1994 | WO1994000607A1 Hydrometallurgical copper extraction process |
| 01/06/1994 | WO1994000606A1 Production of metals from minerals |
| 12/29/1993 | EP0575768A1 Method of recovering lead from recycable lead-containing raw material |
| 12/29/1993 | EP0390875B1 Process for separating antimony from acidic solutions containing same |
| 12/29/1993 | CN1079993A Separating silicofluoric acid from lead-tin paragenesis ore |
| 12/28/1993 | US5274129 Hydroxamic acid crown ethers |
| 12/28/1993 | US5273725 Concentrating radionuclide products by digesting with an aqueous solution of boric acid and a mineral acid; using a cation reactant to precipitate fluoride compounds |
| 12/23/1993 | WO1993025716A1 Method for detoxication of combustion residues by removing the movable toxic compounds and by binding and concentrating said compounds obtained from treatment solutions |
| 12/23/1993 | DE4320314A1 Valuable metal selective sepn. without jarosite or double salt formation - by neutralising organic extn. soln. and exchanging ammonium or alkali ions in extractant with metal ions before main extn. stage |
| 12/23/1993 | DE4220041A1 Camp fuel combustion in furnace combustion chamber - involves feeding super heated steam continuously into furnace combustion chamber |
| 12/23/1993 | CA2114137A1 Method for detoxication of combustion residues by removing the movable toxic compounds and by binding and concentrating said compounds obtained from treatment solutions |
| 12/22/1993 | EP0574463A1 Process for recovery of metal |
| 12/21/1993 | US5271910 Process of treating metal chloride wastes |
| 12/21/1993 | US5271909 Method of tellurium separation from copper electrorefining slime |
| 12/21/1993 | US5271760 Recovery of liquid mercury from process streams |
| 12/21/1993 | CA1325337C Process of producing alkali metals |
| 12/16/1993 | DE4218863A1 Treating granular material or waste water loaded with heavy metals - by binding metals with chelating agent and passage through ion exchange system |
| 12/15/1993 | EP0571467A4 Mineral recovery apparatus |
| 12/15/1993 | CN2149402Y Multi-function reaction tank for ammonia extraction of cupric oxide ore |
| 12/15/1993 | CN1079510A Treatment method of high arsonium lead anode mud wet process |
| 12/15/1993 | CN1023131C Process for separating gallium from basic solutions |
| 12/15/1993 | CA2070935A1 Combined transuranic-strontium extraction process |
| 12/09/1993 | WO1993024669A2 Continuous ore reaction process |
| 12/09/1993 | WO1993024250A1 Method for decontaminating soils polluted by metals |
| 12/09/1993 | WO1993024249A1 Process for decontamination of metal-polluted earth |
| 12/09/1993 | CA2136847A1 Process for the decontamination of lands polluted by metals |
| 12/09/1993 | CA2136179A1 Continuous ore reaction process |
| 12/09/1993 | CA2113826A1 Method for decontaminating soils polluted by metals |
| 12/08/1993 | EP0573182A1 Process for extracting metal values |
| 12/08/1993 | EP0573083A1 Process for the treatment of vanadium containing wastes |
| 12/08/1993 | EP0572444A1 Process and device for removing metal from flue dust |
| 12/08/1993 | CN1079258A Process for producing manganese sulfate and extracting silver from manganese-silver ore |
| 12/08/1993 | CN1023025C Method of extracting silver and gold from anode argillaceous nitric acidic residue of tin soldering |
| 12/07/1993 | CA1325016C Process for the recovery of rhodium from aqueous solutions containing rhodium complexes |
| 12/07/1993 | CA1325015C Recovery process |
| 12/07/1993 | CA1324977C Process of treating residues from the hydrometallurgical production of zinc |
| 12/06/1993 | CA2097158A1 Chemical process |
| 12/04/1993 | CA2070315A1 Recovery of metal from an ore |
| 12/02/1993 | DE4316240A1 Non-ferrous metal recycling in phosphating baths - comprises leaching the slurries with phosphoric acid and recycling the non-ferrous metal solns. obtd. in the phosphating bath for iron surface treatment |
| 12/01/1993 | EP0571467A1 Mineral recovery apparatus |
| 12/01/1993 | CN1079004A Technology for removing and recoverying orpiment assenblende from metallurgical mine containing arsnide |
| 12/01/1993 | CN1078923A Process for the separation of certain elements from aqueous solutions resulting from the reprocessing of spent nuclear fuels |
| 11/30/1993 | US5266282 Selective liquid/liquid extraction of yttrium from other rare earths values |
| 11/30/1993 | CA1324724C Process for the removal of cobalt impurities from zinc sulphate solutions |
| 11/25/1993 | WO1993023578A2 Process for the separation of cobalt from nickel |
| 11/25/1993 | WO1993019398A3 Composition for removing adhesives from polymeric film and process for using same |
| 11/25/1993 | CA2135625A1 Process for the separation of cobalt from nickel |
| 11/24/1993 | CN1078751A Process for cerium oxide |
| 11/23/1993 | US5264191 Quaternary ammonium trihalide and method for dissolution of metal with liquid containing the compound |
| 11/18/1993 | EP0516763A4 Deoxidation of a refractory metal |
| 11/16/1993 | US5262136 Recovery of gold and silver from complex refractory sulphide ores by cyanidisation and oxidation with peroxides |
| 11/16/1993 | US5262020 Recovering lead from batteries, redox couple to solubilize lead dioxide |
| 11/16/1993 | US5261945 Reduction precipitation with alkali metal borohydride |
| 11/11/1993 | WO1993022478A1 Electrolytic method of obtaining gallium metal |
| 11/11/1993 | DE4214415A1 Extracting metal and metal cpds. from combustion engine residue by chelation - using chelating agent soln. in electrolyte and synergistic effect obtd. by motion in relation to electric field |
| 11/10/1993 | EP0569265A1 Process for the dissolution of plutonium or other radioactive elements from solid or liquid products and microwave-powered heating device for carrying out the process |
| 11/10/1993 | EP0568670A1 Regeneration of hydrochloric acid. |
| 11/10/1993 | CN1022696C Treatment of antimony sulfide ore of high lead and arsenic content |
| 11/09/1993 | US5260490 Process for recovering rhodium from the reaction products of the oxo synthesis |
| 11/09/1993 | US5260040 Reacting sample with thiourea and ferric ions while adding a complexing agent for ferric ions consumption of thiourea is reduced |
| 11/09/1993 | US5260039 Process for the two-phase extraction of metal ions from phases containing solid metal oxides, agents and the use thereof |
| 11/03/1993 | CN1077993A Fluoride method for recovering Nd-Fe-B rare earth permanent magnet spent material |
| 11/02/1993 | US5258524 Bis-bibenzimidazole composition |
| 11/02/1993 | US5258167 Extractant for rare earth metal and method for extracting the same |
| 11/02/1993 | CA1323763C Selective ammoniacal pressure leaching of noble metal concentrates |
| 10/28/1993 | WO1993019212A3 Recovery of precious metal |
| 10/27/1993 | CN1077753A Process for preparing active zinc oxide and high purity zinc oxide |
| 10/27/1993 | CN1022578C Treatment and use of waste residue and waste liq. from Cd-Ni cell |
| 10/26/1993 | US5256383 Process for the separation of actinides from lanthanides by the selective extraction of the actinides in an organic solvent incorporating a propane diamide |
| 10/26/1993 | US5256189 With zinc added to slurry before oxidation to render silver more extractable by cyanide leaching |
| 10/26/1993 | US5256188 Process for the separation of rhodium from organic solutions |
| 10/26/1993 | US5256187 Using 8-hydroxyquinoline and thiourea stripping process |
| 10/20/1993 | EP0565800A2 Process for the recovery of noble metals and tertiary phosphines |
| 10/20/1993 | EP0525125A4 Method for stripping metals in solvent extraction |
| 10/20/1993 | EP0479814B1 Dissolving values of platinum group metals from ores and concentrates |
| 10/20/1993 | EP0344324B1 Process for producing particulate metal powder |
| 10/20/1993 | CN1077497A Technology for wet-process cupper smelting |
| 10/19/1993 | US5254695 Substituted triazoles |
| 10/19/1993 | CA1323200C Rare earth separation process |
| 10/14/1993 | WO1993020249A1 Mineral processing |
| 10/13/1993 | CN1022422C Method for recovering scrap battery lead |
| 10/12/1993 | US5252483 Degradation of ferric chelates by a pure culture of agrobacterium sp. |
| 10/12/1993 | CA1322855C Process for refining gold and apparatus employed therefor |
| 10/06/1993 | EP0564401A2 Method of selective recovery of ferrous and nonferrous metals from industrial wastes and scrap home electric appliances |
| 10/05/1993 | US5250273 Recovering gold, uranium, copper, zinc, mickel and lead from ores, calcines |
| 10/01/1993 | CA2064543A1 Whole ore treatment process for the recovery of nickel, cobalt and copper from sulfide ore and tailings |