| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 03/15/1977 | US4012482 Scrubbing of ammonia from oxime liquid ion exchange reagents |
| 03/15/1977 | US4012481 Process for the separation of platinum group metals |
| 03/08/1977 | US4011297 In-situ ph measurement of organic-continuous solvent extraction processes |
| 03/08/1977 | US4011146 Process for separation and recovery of metal values from sulfide ore concentrates |
| 03/01/1977 | US4010237 Aqueous polyalkylenehexamine solution, oxygen |
| 02/15/1977 | US4008308 Separation of cobalt from nickel thiocyanates with isophorone |
| 02/15/1977 | US4008134 Extraction and separation of metals from solids using liquid cation exchangers |
| 02/15/1977 | US4008077 Chelating agent, aluminum coated with alumina |
| 02/15/1977 | US4008076 Hydrometallurgy |
| 02/01/1977 | US4006215 Recovering iron, nickel, or cobalt from sulfate solution |
| 02/01/1977 | US4006080 Process for the treatment of acidic waste liquid containing dissolved salts |
| 01/25/1977 | US4005173 Steam stripping of ammoniacal solutions and simultaneous loading of metal values by organic acids |
| 01/25/1977 | US4004990 Process for separating and recovering nickel and cobalt |
| 01/18/1977 | US4003975 Solvent extraction of copper values using dihydroxy azoarenes |
| 01/18/1977 | US4003557 Device for the cementation of metals by liquid amalgams |
| 01/11/1977 | US4002717 Refining of manganese oxide ores |
| 01/11/1977 | US4002564 Cation-exchange resins having cross-linked vinyl aromatic polymer matrix with attached amino alkylene phosphonic acid groups, their use, and preparation |
| 01/11/1977 | US4002544 Hydrometallurgical process for the recovery of valuable components from the anode slime produced in the electrolytical refining of copper |
| 01/11/1977 | US4002469 Silver, water soluble sulfates |
| 12/28/1976 | US4000244 Wet-chemical digestion of molybdenum sulphide containing material |
| 12/28/1976 | US3999983 Method of recovering the constituents of catalysts comprising an aluminous carrier, platinum and iridium |
| 12/21/1976 | US3998924 Recovery of non-ferrous metals from acidic liquors with a chelate exchange resin in presence of iron(III) |
| 12/21/1976 | US3998628 Leaching with copper or iron chlorides, injecting chlorine |
| 12/21/1976 | US3998627 Process for recovering metals from metal ammine bearing ammonium salt solutions using ion exchange resin |
| 12/21/1976 | US3998622 From rhodium trialkyl phosphite ligand complex catalyst; hollow, porous agglomerates |
| 12/14/1976 | US3997565 Acylcrownether oximes and oxime ethers |
| 12/14/1976 | US3997337 Separation and/or purification of precious metals |
| 12/07/1976 | US3996046 Extraction and purification of silver from sulfates |
| 11/23/1976 | US3993729 Process for the manufacture of potassium phosphates |
| 11/23/1976 | US3993293 Automatic leaching system for hydro-metallurgical production of zinc |
| 11/16/1976 | US3992507 Halidation of manganiferous ore to obtain metal values and recovery and recycle of halide values |
| 11/16/1976 | US3992294 Ureaphosphonates |
| 11/16/1976 | US3992270 Iron, nitric acid lixiviation |
| 11/16/1976 | US3992197 Silver crystals and production thereof |
| 11/09/1976 | US3991159 High temperature neutralization of laterite leach slurry |
| 11/09/1976 | US3990891 Aluminum halides |
| 11/02/1976 | US3989607 Copper di(2-ethylhexyl)phosphate |
| 11/02/1976 | US3989509 Catalytic hydrogen reduction of metals from solutions |
| 10/26/1976 | US3988417 With dichlorodisulfide or dichloroethane |
| 10/26/1976 | US3988416 Elevated pressure operation in the cuprion process |
| 10/26/1976 | US3988224 Method of extraction of metallic elements from submarine nodules |
| 10/26/1976 | US3988151 Liquid ion exchange process for the recovery of copper and nickel |
| 10/19/1976 | US3987145 Ferric ion as a scavenging agent in a solvent extraction process |
| 10/19/1976 | US3986866 Method of recovery of metal compounds and metals from nitrate solutions |
| 10/12/1976 | US3985857 Process for recovering zinc from ferrites |
| 10/12/1976 | US3985856 Removal of iron from aqueous acid solutions containing iron and copper |
| 10/12/1976 | US3985854 Rh from car exhaust catalystsreacting hydrochloric acid and bromine with exhaust catalysts to leach out platinum or rhodium |
| 10/12/1976 | US3985554 Method for removing metals from dilute aqueous solutions |
| 10/12/1976 | US3985552 Separation of platinum group metals and gold |
| 10/05/1976 | US3984520 Ion exchanging |
| 10/05/1976 | US3984479 9-borabicyclo(3.3.1) nonane |
| 09/28/1976 | US3983222 Continuous process |
| 09/28/1976 | US3983210 Ferric oxide or hydroxide as precipitating agent |
| 09/28/1976 | US3983017 Recovery of metal values from manganese deep sea nodules using ammoniacal cuprous leach solutions |
| 09/28/1976 | US3982932 Endopeptidase |
| 09/21/1976 | US3981969 Pressurized column solvent extraction of nickel from ammoniacal solutions |
| 09/21/1976 | US3981968 Oxime or oxine compounds |
| 09/21/1976 | US3981966 Zinc recovery from acidic aqueous streams |
| 09/21/1976 | US3981962 Decomposition leach of sulfide ores with chlorine and oxygen |
| 09/07/1976 | US3979266 Process for purifying aqueous solutions, of metal ions precipitating as arsenides, antimonides, tellurides, and selenides |
| 09/07/1976 | US3979265 Recovery of metals from sulfur bearing ores |
| 09/07/1976 | US3979207 Refining of noble group metals |
| 09/07/1976 | US3979205 Metal recovery method |
| 08/24/1976 | US3976775 Method for dissolving plutonium dioxide |
| 08/24/1976 | US3976743 Treatment of zinc plant residue |
| 08/24/1976 | US3976742 Metal extraction process using quaternary ammonium thiocyanates |
| 08/24/1976 | US3976475 Or niobium from acid solutions thereofamine, extraction, hydrogen peroxide |
| 08/17/1976 | US3975190 Hydrometallurgical treatment of nickel and copper bearing intermediates |
| 08/17/1976 | US3975189 Recovery of copper sulphide and nickel from solution |
| 08/03/1976 | US3972710 Hydrofluoric acid, ketone extraction, silicofluoric acid |
| 07/27/1976 | US3971843 Process for liquid/liquid extraction of gallium |
| 07/20/1976 | US3970737 Metal, particularly gold, recovery from adsorbed cyanide complexes |
| 07/13/1976 | US3969478 Process for separation of tungsten and molybdenum by extraction |
| 07/13/1976 | US3969476 Solvent-in-pulp extraction |
| 07/13/1976 | US3969107 Combined process for working up pure and complex copper concentrates |
| 07/13/1976 | US3969106 Selective hydrometallurgical separation of lead from complex lead-zinc-copper sulfide ores or derived concentrates |
| 07/06/1976 | US3967957 Aqueous ammonia oxidative leach and recovery of metal values |
| 07/06/1976 | US3967956 Palladium, oxime solvent |
| 06/29/1976 | US3966909 Solvent extraction of aluminum |
| 06/29/1976 | US3966873 Mixing, solvent extraction, stripping |
| 06/29/1976 | US3966872 Solvent extraction, stripping |
| 06/29/1976 | US3966569 Method of recovering metal from metalliferous waste |
| 06/29/1976 | US3966462 Recovery of nitric acid soluble transition metals from sulfur and iron containing ores of the same |
| 06/22/1976 | US3965239 Recovery of nitric acid soluble transition metals from sulfur and iron containing ores of the same |
| 06/22/1976 | US3965238 Acidifying phosphate rock, solvent extraction |
| 06/22/1976 | US3964901 Multistage |
| 06/08/1976 | US3962051 Ni, cu, s |
| 06/08/1976 | US3961941 Method of producing metallic lead and silver from their sulfides |
| 06/08/1976 | US3961908 Autoclave system for leaching sulfide concentrates |
| 06/01/1976 | US3961017 From alkali metal borohydride and dimethylsulfide borane |
| 06/01/1976 | US3960549 Process for the separation and purification of platinum, rhodium and iridium |
| 05/25/1976 | US3959437 Hydrometallurgical process for the recovery of zinc, copper and cadmium from their ferrites |
| 05/25/1976 | US3959436 Process for leaching sulfide minerals |
| 05/25/1976 | US3959097 Selenium rejection during acid leaching of matte |
| 05/25/1976 | US3958985 Inorganic acids, heat treatment |
| 05/25/1976 | US3958983 Reacting with an aqueous solution of chromium, vanadium or titanium ore |
| 05/25/1976 | US3958947 Hydrometallurgical leaching apparatus |
| 05/18/1976 | US3957506 Catalytic water treatment to recover metal value |
| 05/18/1976 | US3957504 Metals, chelate compounds |
| 05/11/1976 | US3956088 Process for the destruction of developed and undeveloped photosensitive film and the recovery of products therefrom |