| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 01/30/1979 | CA1047258A1 Process for recovering copper from basic salt mixtures |
| 01/24/1979 | EP0000457A1 Process for the recovery of gallium from very basic solutions by liquid/liquid extraction. |
| 01/23/1979 | US4135976 Treatment of photographic processing effluents using photosynthetic sulfur bacteria |
| 01/23/1979 | US4135911 Rhodium recovery from hydroformylation still heel with triaryl phosphite ligand |
| 01/16/1979 | CA1046289A1 Hydrometallurgical treatment of nickel and copper bearing intermediates |
| 01/16/1979 | CA1046287A1 Atmospheric leaching of matte containing iron |
| 01/09/1979 | US4133866 Process for the selective separation of the bound sodium content of red mud |
| 01/09/1979 | CA1045832A2 Process for extraction and separation of metals using liquid cation exchangers |
| 01/09/1979 | CA1045829A1 Process for zinc and silicium bearing materials to recuperate the zinc content |
| 01/09/1979 | CA1045825A1 Process for the destruction of developed and undeveloped photosensitive film and the recovery of products therefrom |
| 01/02/1979 | US4132758 Copper leaching employing nitrogen dioxide as oxidant |
| 12/26/1978 | US4131641 Nickel recovery process |
| 12/26/1978 | US4131454 Process for recovering silver and gold from chloride solutions |
| 12/19/1978 | US4130625 Recovery and purification of iridium |
| 12/19/1978 | US4130273 Silver recovery improvements |
| 12/19/1978 | CA1044825A1 Treatment of solutions containing impure metals |
| 12/19/1978 | CA1044471A1 Method and apparatus for recovery of heavy metal ions from dilute aqueous solution |
| 12/19/1978 | CA1044468A1 Extracting of iron ore and chromium from nickel lateritic ores |
| 12/12/1978 | CA1044022A1 Process for the ferric chloride leaching of sulfide ores |
| 12/05/1978 | US4128493 Compositions useful in process for extraction of metal values from acidic solutions |
| 12/05/1978 | CA1043576A1 Two stage leaching of limonitic ore and sea nodules |
| 11/28/1978 | US4127458 Recovering platinum group metal as a stable complex |
| 11/14/1978 | US4125588 Nickel and magnesia recovery from laterites by low temperature self-sulfation |
| 11/14/1978 | US4125587 Removing zinc from a nickel solution by extraction |
| 11/07/1978 | US4124462 Solvent extraction |
| 11/07/1978 | CA1041772A1 Continuous solvent extraction of nickel from ammoniacal solutions |
| 11/07/1978 | CA1041771A1 Autoclave system for leaching sulfide concentrates |
| 10/31/1978 | US4123435 Nitro-substituted benzoxazoles having utility as metallurgical extractants |
| 10/31/1978 | CA1041304A1 Process for recovering valuable metals from sulfate solutions |
| 10/24/1978 | CA1040868A1 Process for recovery of valuable metals from solution using neutralization by lime or limestone |
| 10/24/1978 | CA1040866A1 Refining of chloride salts |
| 10/24/1978 | CA1040837A1 Process for the recovery of group 1-b metal halides from bimetallic salt complexes |
| 10/17/1978 | US4120934 Crushing, leaching, roasting |
| 10/17/1978 | US4120862 Use of copper halide catalysts and certain epoxy compounds to oxidize nitro-substituted Schiff bases to benzoxazoles |
| 10/17/1978 | US4120817 Carboxylic acid and a hydroxy-oxime |
| 10/17/1978 | US4120769 Aqueous ore leach solutions, recovering metal values; ion exchanging |
| 10/17/1978 | CA1040436A1 Process for extraction and separation of metals using liquid cation exchangers |
| 10/10/1978 | US4119699 Method for wet metallurgical processes |
| 10/10/1978 | US4119698 Digestion with sulfuric acid or sulfur trioxide, bayer process |
| 09/26/1978 | US4117088 Hydrophosphide-group containing multi-metal inorganic polymeric complex and method of making same |
| 09/26/1978 | US4116783 Method for recovering variable-valency elements and purifying sewage waters |
| 09/26/1978 | CA1039234A1 Process for the production of high-purity metals from nickeliferous mattes |
| 09/26/1978 | CA1039065A1 Copper cementation |
| 09/19/1978 | US4115512 Method for removing arsenic from copper and/or nickel bearing aqueous acidic solutions by solvent extraction |
| 09/19/1978 | US4115108 Matte smelting |
| 09/12/1978 | US4113685 Flocculating agent comprising water-in-oil emulsion of stabilizer plus NH-active polymer carrying formaldehyde and amine radicals |
| 09/12/1978 | US4113471 Extraction of non-ferrous metal values from dolomitic oxide ores |
| 09/12/1978 | US4113467 Adsorbing solution onto sodium silicate catalysts, reduction |
| 09/12/1978 | CA1038168A1 Matrix of algae and method of making same and method of obtaining uranium from sea water by said matrix |
| 09/05/1978 | US4111688 Method for separating gold from acid aqueous solution |
| 09/05/1978 | US4111686 Forming a cyanide complex, reduction with hydrogen |
| 08/29/1978 | US4110401 Leaching |
| 08/22/1978 | US4108958 Extraction of Cu(II), Fe(III), Ni(II), Co(II), Cd(II), Zn(II), Ca(II) and Mg(II) metal values using 2-hydroxy iminoacetic acids |
| 08/22/1978 | US4108744 Dialyzing, complexing with sodium chloride, ion exchanging |
| 08/22/1978 | US4108722 Method for the restoration of an underground reservoir |
| 08/22/1978 | US4108640 Hydrometallurgical process for the production of cobalt powder from mixed metal sulphides |
| 08/22/1978 | US4108639 Process for recovering platinum group metals from ores also containing nickel, copper and iron |
| 08/22/1978 | CA1036829A1 Two stage sulfuric acid leaching of sea nodules |
| 08/22/1978 | CA1036827A1 Process for separating a noble metal from an alloy containing same |
| 08/22/1978 | CA1036826A1 Solvent extraction (lix) of aluminum |
| 08/15/1978 | US4107265 Treating residues from the leaching of roasted zinc blende |
| 08/15/1978 | US4107262 Cuprion process start-up control |
| 08/15/1978 | US4107261 Process for the separation of platinum group metals |
| 08/15/1978 | CA1036363A1 Separation of metals |
| 08/15/1978 | CA1036362A1 Refining of metals |
| 08/08/1978 | US4105743 Selectively extracting copper, zinc, nickel from a mixture of metal hydroxides |
| 08/08/1978 | US4105742 Solvent extraction |
| 08/08/1978 | US4105442 Multistage; conversion with nitric acid to nitrosylruthenium complex, with hydrochloric acid to chloro complex, anion exchanging on resin |
| 08/08/1978 | US4105253 Carbonic acid and oxidizing agent, leach solution for uranium mining |
| 08/01/1978 | US4104359 Treating with salt of hydroxylamine |
| 07/25/1978 | US4102976 Leaching with acid, adding arsenic and/or phosphorus |
| 07/18/1978 | US4101408 Countercurrent extraction column for liquid-liquid extraction |
| 07/11/1978 | US4100251 Method of recovering metals out of soot originating from the combustion of oil |
| 07/11/1978 | US4100163 Substituted 8-sulfonamidoquinolines |
| 07/11/1978 | US4100043 Atmospheric leach ion-exchange process for treating iron-containing nickel-copper matte |
| 07/04/1978 | US4098870 Acid leaching of nickeliferous oxide ores with minimized scaling |
| 06/27/1978 | US4097575 Roast-neutralization-leach technique for the treatment of laterite ore |
| 06/27/1978 | US4097273 Dissolving in morpholine, piperidine, or a primary or secondary amine, evaporation |
| 06/27/1978 | US4097272 Winning nickel and cobalt with mercaptide extractants and carbon monoxide strip |
| 06/27/1978 | US4097271 Leaching, precipitating cuprous chloride with butadiene, decomposing, oxidizing, hydrolyzing to get cupric oxychloride |
| 06/20/1978 | US4096064 System for removal of toxic heavy metals from drinking water |
| 06/20/1978 | US4095975 Continuous recovery of copper metal from acidic solutions |
| 06/13/1978 | US4094668 Leaching, roasting, slurrying |
| 06/06/1978 | US4093698 Process for the simultaneous extraction of metal values from manganese nodules |
| 06/06/1978 | US4093526 Hydrometallurgical leaching and refining of nickel-copper concentrates, and electrowinning of copper |
| 05/23/1978 | US4090959 Process for sequestering metal ions |
| 05/23/1978 | US4090871 Process for the recovery and purification of germanium from zinc ores |
| 05/09/1978 | US4088733 Alpha-hydroxyoxime, organic phosphate |
| 04/25/1978 | US4086084 Refining of metals |
| 04/18/1978 | US4085261 Organic reagents and process of preparing same |
| 04/18/1978 | US4084961 Treatment of metal bearing mineral material |
| 04/11/1978 | US4083915 Reduction to divalent state, stripping with dilute acid |
| 04/04/1978 | US4082629 Hydrometallurgical process for treating metal sulfides containing lead sulfide |
| 04/04/1978 | US4082546 Recovery of waste heavy metals from solutions by cementation with aluminum |
| 03/28/1978 | US4081506 Drying, grinding, roasting with sulfur, leaching |
| 03/28/1978 | US4081271 Process for separating and recovering rhodium and iridium from their mixtures with other precious metals |
| 03/21/1978 | US4080419 Recovering copper values using ammonium carbonate or sulfuric acid leaching agent and a surfactant |
| 03/14/1978 | US4078918 Method for precious metal recovery |
| 03/07/1978 | US4078040 Method of employing elemental zinc for the purification of aqueous solutions of metallic salts |
| 03/07/1978 | US4078002 9-borabicyclo(3.3.1)nonane |