| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
|---|
| 12/08/1999 | CN1237920A Production of aromatic carboxylic acids and recovery of Co/Mn cattalyst from ash |
| 12/08/1999 | CN1237642A New cadmium-removing process for preparation of zinc salt and electrolytic zinc and its equipment |
| 12/08/1999 | CN1237641A Technological process for extracting Ni, Cu, Co and Mg from nickel sulfide preparation concentrate and making nickelferrite |
| 12/07/1999 | US5997828 Process for production of alumina from ore bodies containing aluminum |
| 12/07/1999 | US5997718 Recycling of CdTe photovoltaic waste |
| 12/07/1999 | US5997610 Amphiphilic compounds with at least two hydrophilic and at least two hydrophobic groups based on dicarboxylic acid diamides |
| 12/02/1999 | WO1999061670A1 Tantalum sputtering target and method of manufacture |
| 12/02/1999 | WO1999061669A1 Mineral collector compositions of fatty hydroxamic acid in admixture with an oil and process of making same |
| 12/01/1999 | EP0773301B1 Hydrometallurgical treatment for the purification of waelz oxides through lixiviation with sodium carbonate |
| 12/01/1999 | CN1236818A Low-temp technology for smelting aluminium by wet method |
| 12/01/1999 | CN1236735A Separating and refining process for Co-Mn mixture |
| 12/01/1999 | CN1046966C Wet-metallurgy method for recovering metal |
| 12/01/1999 | CN1046965C Method for reduction extracting manganese oxide ore with phenol |
| 11/30/1999 | US5993757 Oxime metal extractant, and aldehyde or ketone degradates in a water immiscible hydrocarbon solvent is reoximated thereby restoring the oxime extractant organic phase for further extraction in the metal extraction circuit. |
| 11/30/1999 | US5993635 Processing a sulphide mineral composition which at least partly comprises an iron-containing mineral. |
| 11/30/1999 | US5993514 Process for upgrading copper sulphide residues containing nickel and iron |
| 11/30/1999 | US5993513 Method for controlling the oxygen content in valve metal materials |
| 11/25/1999 | WO1999060179A1 Recovery of nickel from copper refinery tankhouse electrolyte |
| 11/25/1999 | WO1999060178A1 Hydrometallurgical treatment process for extraction of platinum group metals obviating the matte smelting process |
| 11/25/1999 | WO1999060176A1 Method for processing residues containing at least one non-ferrous metal and/or compounds thereof |
| 11/24/1999 | EP0958390A1 Improvement in the process of recovery of metals |
| 11/24/1999 | CN1236023A Method for producing nickel and iron compound by using waste corrosive liquid containing nickel and iron chloride series |
| 11/24/1999 | CN1236015A Molybdenum removing technology in tungsten smelting process |
| 11/24/1999 | CN1236014A Method for leaching nickel from nickel matte |
| 11/23/1999 | US5989508 Liquid medium extraction purification method |
| 11/23/1999 | US5989430 Adsorption of antimony cations from electrolyte solution onto anionic polymer ion exchange resin, desorption with acidic solution, neutralization of effluent to precipitate antimony hydroxide for recovery |
| 11/18/1999 | WO1999058732A1 Process to recover molybdenum and vanadium metals from spent catalyst by alkaline leaching |
| 11/17/1999 | EP0853682A4 Process and apparatus for extracting metal |
| 11/17/1999 | CN1235201A Method for adsorption of vanadium by resin |
| 11/16/1999 | US5985221 Method of recovering precious metals |
| 11/15/1999 | CA2235424A1 Process for the preparation of a magnesium chloride solution by quick lixiviation of asbestos tailings |
| 11/09/1999 | US5980854 Method for the production of a magnesium chloride solution |
| 11/09/1999 | US5980842 Separation of calcium from metal compounds |
| 11/09/1999 | US5980725 Method for upgrading waste material comprising sheet metal with a zinc plating on at least one side thereof |
| 11/04/1999 | WO1999056286A2 Method for reducing the level of radioactivity of a metal part |
| 11/04/1999 | DE19818772A1 Verfahren zum Abbau der Radioaktivität eines Metallteiles Method for reducing the radioactivity of a metal part |
| 11/02/1999 | US5976219 Method and apparatus for recycling of scrap metal |
| 11/02/1999 | US5976218 Process for the recovery of nickel |
| 10/30/1999 | CA2270744A1 Method for removal of gold by liquid-liquid extraction from gold-cyanide complex in aqueous solution |
| 10/28/1999 | WO1999054516A1 Modifiers for aldoxime extractant of metal values |
| 10/28/1999 | WO1999054515A1 Nozzle for low pressure flash tanks for ore slurry |
| 10/28/1999 | CA2326806A1 Modifiers for aldoxime extractant of metal values |
| 10/27/1999 | EP0951571A1 Fluid extraction of metals or metalloids |
| 10/27/1999 | EP0846187B1 Recovery of elements involving a chemical processing step |
| 10/27/1999 | CN1232879A Salt adding roast and cyanidation process to extract Au, Ag and Cu comprehensively for copper containing aurin ore |
| 10/27/1999 | CN1232878A Process for recovering rhodium catalyst |
| 10/21/1999 | WO1999053108A1 Method for treating steel works dust by wet process |
| 10/20/1999 | EP0871787B1 Electrochemical processing method for catalyst substrates containing noble metals for the recovery thereof |
| 10/20/1999 | CN1045794C Method for obtaining gold, silver and other noble metals from anode mud contg. high concn. arsenic and lead |
| 10/19/1999 | US5968229 Purification of metal containing solutions |
| 10/13/1999 | EP0949341A1 Process for recovering rhodium catalyst from acetic acid production liquids containing tar |
| 10/13/1999 | EP0948655A1 Recovery of nickel from bioleach solution |
| 10/13/1999 | CN1045626C Process for extracting and separating yttrium by using neutral phosphorus type extracting agent |
| 10/13/1999 | CN1045625C Hydrometallurgical conversion of zinc sulfide to sulfate from zinc sulfide containing ores and concentrates |
| 10/13/1999 | CN1045624C Method for leaching nickel-copper matte |
| 10/12/1999 | US5966584 Method of separating trivalent actinides from trivalent lanthanides |
| 10/12/1999 | US5965025 Detoxification by solvent extracting metalloid and metal species from a solid or liquid material by a supercritical fluid solvent containing a chelating agent, forming chelates that are soluble in the supercritical fluid |
| 10/06/1999 | EP0946767A1 Recovery of iron products from waste material streams |
| 10/06/1999 | EP0946766A1 Method for leaching zinc concentrate in atmospheric conditions |
| 10/06/1999 | EP0946765A1 Hydrometallurgical zinc recovery process and apparatus |
| 10/06/1999 | EP0946300A1 Production of aromatic carboxylic acids and recovery of co/mn cattalyst from ash |
| 10/06/1999 | CN1230600A Technological process of desorbing electrolytic gold from gold-carrying carbon |
| 10/06/1999 | CN1045476C Chloride assisted hydrometallurgical copper extraction |
| 10/05/1999 | US5961940 Method for the treatment of bismuth-containing sulphide ores or concentrates of such ore |
| 10/05/1999 | US5961833 Gold ore is treated with an aqueous cyanide solution to produce a liquid product containing a gold-cyanide complex and a copper-cyanide complex. the liquid product is then delivered to a nanofiltration membrane allows passage of the gold |
| 10/05/1999 | CA2182123C Method for the production of synthetic rutile |
| 09/30/1999 | WO1999049105A1 Fluoboric acid control in a ferric fluoborate hydrometallurgical process for recovering metals |
| 09/30/1999 | WO1999048808A1 METHOD FOR REPROCESSING WASTE ACID RESULTING FROM TiO2 PRODUCTION |
| 09/30/1999 | CA2324308A1 Method for reprocessing waste acid resulting from tio2 production |
| 09/30/1999 | CA2233518A1 Method for separating zinc |
| 09/29/1999 | EP0944550A1 LiPF 6 PRODUCTION PROCESS |
| 09/29/1999 | CN1229856A Method of extracting Cu, Zn, Cd from cobalt solution |
| 09/28/1999 | US5958657 Regeneration of spent fixer solution |
| 09/27/1999 | CA2262186A1 Copper dissolver process |
| 09/23/1999 | WO1999047714A1 Apparatus and methods for recovering valuable metals |
| 09/23/1999 | DE19812261A1 Production of gypsum and iron oxide pigments from dilute acid formed in the manufacture of titanium dioxide |
| 09/21/1999 | US5954854 Method for recovering etchant from etching waste liquid containing iron chloride |
| 09/21/1999 | CA2094192C Process for separating contaminants from organic phases during hydrometallurgical extraction of metals |
| 09/16/1999 | DE19810874A1 Verfahren zur Aufbereitung von Edel- und/oder Halbedelmetallen aus Leiterplatten Process for the preparation of precious and / or semi-precious metals from printed circuit boards |
| 09/15/1999 | EP0942070A1 Recovery of metal values from polyester circuit boards by treatment in alkaline solutions of higher alcohols |
| 09/15/1999 | EP0833961B1 Ammoniacal metal solution recycling process |
| 09/15/1999 | EP0646185B1 Production of metals from minerals |
| 09/15/1999 | CN1228480A Reinforced alkaline-leaching gold-extracting technology for arsenic-containing sulphur-containing difficult-to-extract gold ore |
| 09/14/1999 | US5951744 Hollow wicking fibers impregnated with a fine solid carbon powder and formed into the fiber filter with a selective chemisorptive liquid applied to one side of the fiber and carbon particles to other side, absorb odors of air stream |
| 09/10/1999 | WO1999045160A1 Method for electrochemical oxidation of vanadium in aqueous solutions and method to obtain vanadium pentoxide |
| 09/10/1999 | WO1999045159A1 Extraction of valuable metal by acid cyanide leach |
| 09/10/1999 | WO1999045158A1 Gold recovery process |
| 09/08/1999 | CN1045010C Process for extracting and separating cerium from rare-earth sulfate solution containing fluorine |
| 09/07/1999 | US5948375 Biological oxidation of sulphide minerals to recover gold, silver, platinum group metals and base metals |
| 09/07/1999 | US5948263 Method for separating water soluble organics from a process stream by aqueous biphasic extraction |
| 09/07/1999 | US5948140 Complexing with sodium or potassium halides and calcium orbarium halides; reduction or electrodeposition |
| 09/07/1999 | CA2086384C Process for the recovery of noble metals and tertiary phosphines |
| 09/02/1999 | WO1999043619A1 Method for treating waste water from gold mines in order to obtain drinking water |
| 09/01/1999 | EP0939138A1 Process and apparatus for treating zinc containing waste by alkaline leaching |
| 09/01/1999 | CN1227269A Method for extracting gold from refractory aurin ore |
| 08/31/1999 | US5945077 Separation of copper from chalcopyrite using hydrochloric acid |
| 08/31/1999 | US5944872 Method for phytomining of nickel, cobalt and other metals from soil |
| 08/31/1999 | CA2057217C A process for the decontamination of toxic, heavy-metal containing soils |
| 08/25/1999 | CN2334765Y Rotary drum |
| 08/25/1999 | CN1044824C Method for extracting noble metals by using modified lime-sulfur mixture |