| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
|---|
| 11/16/1988 | CN87103312A Process for gold extraction by acid leaching and polyurethane foam concentration and installation thereof |
| 11/15/1988 | US4784688 Tungsten recovery |
| 11/15/1988 | US4784687 Hydrogen peroxide and promoters for multistage extraction |
| 11/15/1988 | US4784686 Synthesis of ultrafine powders by microwave heating |
| 11/09/1988 | EP0290318A1 Method of recovering gallium by liquid-liquid extraction |
| 11/09/1988 | EP0289537A1 Process for the production of zirconium sulphate. |
| 11/08/1988 | CA1244476A1 Extractants and method for the recovery of palladium |
| 11/08/1988 | CA1244246A1 Extraction process for removing and recovering metals from aqueous solutions |
| 11/02/1988 | EP0289394A2 Process for the purification of a barium salt |
| 11/02/1988 | EP0289390A1 Process for eliminating radioactivity from effluents by liquid-liquid extraction |
| 11/02/1988 | CN88101564A Process for separation of rare earth elements by liquid-liquid extraction |
| 10/26/1988 | CN88101566A Rare-earth elements liquid-liquid extracting method |
| 10/25/1988 | US4780536 Recovery of metal values; crosslinkers for polymers |
| 10/25/1988 | US4780238 Natural chelating agents for radionuclide decorporation |
| 10/25/1988 | US4780138 Sonic apparatus and method for facilitating the extraction of minerals from ore in a leachant |
| 10/19/1988 | CN87101003A Combinative leaching and extracting method, leachex |
| 10/18/1988 | CA1243272A1 Process for the deposition of metals on semiconductor powders |
| 10/13/1988 | DE3710725A1 Process for the direct treatment of rhenium-containing molybdenum sulphides with ammonia |
| 10/12/1988 | EP0286564A1 Process for the production of high-purity magnesium oxide from minerals containing calcium and magnesium |
| 10/12/1988 | CN87102448A Process for dressing copper oxide ore |
| 10/11/1988 | US4777028 Process for freeing mineral acids from heavy metals |
| 10/06/1988 | DE3709463A1 Process for separating off the group of rare earth elements, scandium and yttrium |
| 10/05/1988 | EP0285055A2 Process for recovery of gallium by chelate resin |
| 10/04/1988 | US4775763 Metal extractants |
| 09/28/1988 | EP0284504A1 Process for the liquid-liquid extraction of rare-earth metals |
| 09/28/1988 | EP0284503A1 Process for the liquid-liquid extraction of rare earth metals |
| 09/28/1988 | EP0283740A2 Oxidative dissolution of gallium arsenide and separation of gallium from arsenic |
| 09/27/1988 | US4774262 Crosslinked, binding, esterification recovering metals |
| 09/27/1988 | US4774026 Semiconductor photocatalyst, electromagnetic waves |
| 09/27/1988 | US4774003 Ion exchange extraction of metallic and non-metallic anions by control of the basicity of amine extractants |
| 09/27/1988 | CA1242327A1 Process for removing metals from aluminosilicate materials |
| 09/22/1988 | DE3708140A1 Process for the liquid/liquid extraction of wet-process phosphoric acid with organic solvents |
| 09/21/1988 | EP0282810A2 Method for wet dissolving of nuclear fuels of uranium-plutonium mixed oxide |
| 09/15/1988 | DE3707261A1 Process for the leaching of heavy metals from sewage sludge and low-value ores |
| 09/14/1988 | CN87105120A Technique of preparation of maifan stone crystal |
| 09/13/1988 | US4770807 Novel extraction agents and novel propane diamides |
| 09/13/1988 | CA1241821A1 Reuseable precious metal recovery cartridge |
| 09/07/1988 | EP0280750A1 Method and apparatus for treating H2S containing gases |
| 09/06/1988 | US4769223 Biosorbent for gold |
| 09/06/1988 | US4769116 Hydrometallurgical process for an overall recovery of the components of exhausted lead-acid batteries |
| 09/06/1988 | CA1241774A1 Effluent treatment |
| 09/06/1988 | CA1241543A1 Processes for extracting radium from uranium mill tailings |
| 08/31/1988 | EP0280144A2 Use of citric-acid esters and of mixtures of these esters in extracting iron |
| 08/23/1988 | US4765834 Process for the recovery of metal values |
| 08/23/1988 | US4765827 Metal value recovery |
| 08/17/1988 | EP0278411A2 Gel-type chelating resins and a process for removal of multivalent, alkaline earth or heavy metal cations from solutions |
| 08/16/1988 | US4764352 Process for preventing the extraction of technetium and/or rhenium, particularly during the extraction of uranium and/or plutonium by an organic solvent |
| 08/10/1988 | CN87101216A Direct wet antimony white productive procee from antimony ore |
| 08/09/1988 | US4762693 Process for working up heavy metal-containing residues originally from the decontamination of crude phosphoric acid |
| 08/09/1988 | US4762691 Using organic solvent |
| 08/09/1988 | US4762597 Recovering gold, rotor cathode, anode housing |
| 08/09/1988 | CA1240157A1 Process for the production of cobalt, nickel and copper powders from chelating extractants |
| 08/03/1988 | EP0276215A1 Process for extracting precious metals from ore concentrates. |
| 08/03/1988 | EP0276209A1 Process for separating arsenic from acid solutions which contain it. |
| 08/03/1988 | CN86108798A Prepn. of znso4 and active zno from zinc ore by entire wet-process |
| 08/02/1988 | US4761484 Preferential extraction of copper from mineral concentrates |
| 07/27/1988 | CN87107738A Catalytic-roast wet silver-extracting technology |
| 07/26/1988 | US4759917 Oxidative dissolution of gallium arsenide and separation of gallium from arsenic |
| 07/26/1988 | US4759915 Process for extracting tungsten from alkali metal tungstate solutions |
| 07/26/1988 | US4759913 Centrifuging and removing |
| 07/20/1988 | CN87100207A Preparing zirconium oxide from zircon |
| 07/19/1988 | US4758414 Iron or aluminum precipitation in strong acid systems |
| 07/19/1988 | US4758413 Reactive resins useful for precious metal recovery |
| 07/19/1988 | US4758345 Clostridium under anaerobic condition |
| 07/13/1988 | EP0274120A2 Use of phosphonoalkanecarboxylic acid partial esters for metal extraction |
| 07/12/1988 | US4756887 Injecting leaching solution into wells formed in heap containing ore |
| 07/12/1988 | CA1239019A1 Solvent extraction process for recovery of zinc |
| 07/06/1988 | EP0273244A2 Process for the production of high quality titanium dioxide by the sulfate process |
| 07/05/1988 | US4755270 Method of processing solutions |
| 06/30/1988 | WO1988004696A1 Method and extractant for solvent extraction of silver from aqueous thiosulphate solutions |
| 06/22/1988 | EP0272060A2 Hydrometallurgical recovery of metals and elemental sulphur from metallic sulphides |
| 06/22/1988 | CN86104130A Pipeling type diffuser |
| 06/21/1988 | US4752412 Precious metal recovery using ozone |
| 06/21/1988 | US4752332 Treating manganese-containing ores with a metal sulfide |
| 06/21/1988 | CA1238193A1 Batch leaching process |
| 06/15/1988 | EP0271468A2 Gallium complexes and solvent extraction of gallium |
| 06/15/1988 | EP0270637A1 Manufacture of high purity zirconia from low-silica zirconiferous materials. |
| 06/15/1988 | CN85107329B Chlorination-hydrolyzation process for making antimony white from antimony sulfide ore |
| 06/14/1988 | USRE32694 Separation of cobalt and nickel by solvent extraction |
| 06/14/1988 | US4751063 Process for treating spent catalyst including antimony halides from chlorofluorocarbon production |
| 06/14/1988 | US4751061 Process for recovering scandium from waste material |
| 06/07/1988 | US4749519 Oxidizing with silver oxide, dissolving dechlorination, extraction |
| 06/07/1988 | US4749518 Extraction of cesium and strontium from nuclear waste |
| 05/31/1988 | US4748118 Construction of arsenic resistance vectors for Thiobacillus ferrooxidans |
| 05/31/1988 | US4747728 Method for distributing an aqueous solution containing a peroxygen in clay |
| 05/18/1988 | EP0267668A2 Tri- or tetra-2-hydroxybenzyl-1,2-diaminoalkane derivatives, process for their preparation and their use for extraction of gallium |
| 05/11/1988 | EP0267180A2 Extraction liquid as well as its use in a process for treating Ge-containing aqueous solutions by liquid/liquid extraction |
| 05/11/1988 | DE3637643A1 Method for the arsenic decontamination of aqueous solutions |
| 05/11/1988 | CN87106967A Extract ga from bar solution using soaking and adsorbing resin |
| 05/11/1988 | CN86106873A A complete wet process for producing sponge silver and silver nitrate from silver ore |
| 05/10/1988 | CA1236308A1 Process for hydrometallurgical extraction of precious metals |
| 05/05/1988 | WO1988003128A1 Process for the production of zirconium sulphate |
| 05/05/1988 | WO1988003044A1 Method for the concentration and separation of actinides from biological and environmental samples |
| 05/04/1988 | EP0266337A1 Hydrometallurgical process for recovering silver from electrolytic copper refinery slimes and from similar raw materials |
| 05/04/1988 | EP0265547A1 Method of recovering rare earths, and in a given case, uranium and thorium from heavy phosphate minerals |
| 05/03/1988 | US4741893 Process for producing fluorides of metals |
| 05/03/1988 | US4741887 Gallium complexes and solvent extraction of gallium |
| 05/03/1988 | US4741831 Process and composition for removal of metal ions from aqueous solutions |
| 05/03/1988 | US4741824 Apparatus for continuous elution and absorption |
| 05/03/1988 | US4741810 Process for reductive plutonium stripping from an organic reprocessing solution into an aqueous, nitric acid solution by use of an electrolytic current |