| Patents for C22B 15 - Obtaining copper (5,364) |
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| 02/14/1978 | US4073645 Process of smelting sulphidic copper ore concentrates |
| 02/14/1978 | US4073641 Selective reduction of nickel ore with a low nickel content |
| 02/14/1978 | US4073479 Sulfidization reaction |
| 02/07/1978 | US4072507 Production of blister copper in a rotary furnace from calcined copper-iron concentrates |
| 02/07/1978 | CA1025669A1 Process for refining copper containing mattes and related apparatus_ |
| 01/31/1978 | US4071611 Continuously leaching an ore column |
| 01/24/1978 | US4070437 Process for the recovery of metal chlorides from jarosite sludges resulting from the sulphuric acid processing of ores |
| 01/24/1978 | US4070183 Acetonitrile or cyanoethane stabilizers |
| 01/24/1978 | US4070182 Recovery of precious metals from metal sulphides |
| 01/17/1978 | US4069294 Hydrometallurgical recovery of metal values |
| 01/17/1978 | US4069119 Copper recovery by leaching and ion exchange |
| 01/17/1978 | US4069041 Multistage sulfatizing |
| 01/10/1978 | US4067952 Leaching of copper-nickel concentrates |
| 01/03/1978 | US4066733 Metal extraction from sea nodules |
| 01/03/1978 | US4066520 Slurry electrowinning process |
| 12/27/1977 | US4065542 Two stage leaching of limonitic ore and sea nodules |
| 12/27/1977 | US4065300 Method for extraction of copper products from copper bearing material |
| 12/27/1977 | US4065110 Method and apparatus for purifying blister furnace effluent |
| 12/06/1977 | US4061552 Electrolytic production of copper from ores and concentrates |
| 11/15/1977 | US4058395 Extracting copper from sulphide concentrates |
| 11/08/1977 | US4057422 Extraction, dehydration, sulfiding, oxidation, precipitation |
| 11/01/1977 | US4056262 Cupola furnace to enable continuous smelting and refining of cement copper and method therefor |
| 10/25/1977 | US4055415 Pyrometallurgy |
| 10/18/1977 | US4054446 Sulfidizing copper sulfide, chlorination |
| 10/11/1977 | US4053305 Recovery of copper and silver from sulfide concentrates |
| 09/27/1977 | US4051220 Sodium sulfide leach process |
| 09/20/1977 | US4049770 Recovery of copper and zinc as sulfides from copper-iron sulfides |
| 09/20/1977 | US4049514 Electrowinning, leaching, forming copper arsenate |
| 09/13/1977 | US4048282 Solvent extraction of copper with dilution of the organic phase |
| 09/13/1977 | US4048187 5-(2-Hydroxyphenyl)tetrazolyl compounds |
| 09/13/1977 | US4047940 Separation and recovery of copper metal from ammoniacal solutions |
| 09/13/1977 | US4047938 Process for refining molten metal |
| 09/06/1977 | US4046851 Two stage sulfuric acid leaching of sea nodules |
| 09/06/1977 | US4046556 Direct gaseous reduction of oxidic metal ores with dual temperature cooling of the reduced product |
| 08/23/1977 | US4043882 Selective solvent extraction process for copper from nickel |
| 08/23/1977 | US4043804 Recovery of metal values from copper reverberatory slag |
| 08/23/1977 | US4043599 Acid preinjection to decrease instantaneous acid consumption in in-situ mining |
| 08/16/1977 | US4042664 Method for separating metal constituents from ocean floor nodules |
| 08/02/1977 | US4039612 Process for extracting cobalt, copper or zinc values using a 1-alkyl substituted benzimidazole |
| 08/02/1977 | US4039406 Bromide, chloride ions |
| 08/02/1977 | US4039405 Leaching copper ores and solvent extraction of the copper-bearing solutions |
| 08/02/1977 | US4039324 Fluidized hydrogen reduction process for the recovery of copper |
| 07/26/1977 | US4038070 Low temperature and pressure continuous reduction of copper in acid solutions |
| 07/26/1977 | US4038068 Method of melting copper alloys with a flux |
| 07/26/1977 | US4038066 Method of stripping base metals from fused salts |
| 07/19/1977 | US4036639 Production of copper |
| 07/19/1977 | US4036636 Flash furnace process |
| 07/05/1977 | US4034063 Process for control of SOx emissions from copper smelter operations |
| 07/05/1977 | US4033765 Extractions of copper from solutions by reduction with anthraquinols |
| 07/05/1977 | US4033763 Process for recovery of selected metal values from waste waters |
| 06/28/1977 | US4032332 Process for increasing the rate of copper metal production in a quinolic extraction system |
| 06/28/1977 | US4032331 Process for conserving quinolic compounds in an organic extractant copper recovery system |
| 06/28/1977 | US4032330 Process for recovery of copper |
| 06/28/1977 | US4032327 Pyrometallurgical recovery of copper from slag material |
| 06/21/1977 | US4030990 Process for recovering electrolytic copper of high purity by means of reduction electrolysis |
| 06/21/1977 | US4030917 Hydrometallurgical processing of metal sulfides |
| 06/21/1977 | US4030915 Process for producing raw copper continuously in one stage from unrefined sulfidic copper concentrate or ore |
| 06/14/1977 | US4029733 Manganese |
| 06/14/1977 | US4029498 Process for treating manganese nodules |
| 06/07/1977 | US4027864 Process and apparatus for recovering dissolved copper from solutions containing copper |
| 06/07/1977 | US4027863 Suspension smelting furnace for finely-divided sulfide and/or oxidic ores or concentrates |
| 05/31/1977 | US4026797 Precipitation of selenium from copper electrowinning solutions |
| 05/31/1977 | US4026773 Extracting metal values from manganiferous ocean nodules |
| 05/24/1977 | US4025335 Method for the recovery of useful metallic components |
| 05/17/1977 | US4024218 Process for hydrometallurgical upgrading |
| 05/17/1977 | US4023964 Method of obtaining copper from copper-bearing ores |
| 05/10/1977 | US4022866 Recovery of metals |
| 05/03/1977 | US4021235 Operating method for slag cleaning furnace in copper refining |
| 04/26/1977 | US4020143 Use of raw manganese nodules for oxidation leaching of reductively roasted manganese nodules |
| 04/26/1977 | US4020105 Oxime |
| 04/26/1977 | US4019725 Gas seal and silencer for use on tuyere body |
| 04/19/1977 | US4018866 Metal carbonate recycle to reduction circuit in the cuprion process |
| 04/19/1977 | US4018595 Production of copper by gaseous reduction |
| 04/12/1977 | US4017307 Or metal combinations with the aid of a melting cyclone |
| 04/05/1977 | US4016056 Lixiviation with cupric chloride, extraction, oxidation, sulfation, electrolysis |
| 04/05/1977 | US4016055 Containing copper, cobalt, iron and nickel; chlorination |
| 03/22/1977 | US4013754 Static leaching copper ore |
| 03/22/1977 | US4013457 Process for the recovery of cuprous chloride in the presence of metal impurities |
| 03/15/1977 | US4012482 Scrubbing of ammonia from oxime liquid ion exchange reagents |
| 03/08/1977 | US4011290 Method and device for dispersing a melt with a fluid jet |
| 03/01/1977 | US4010099 Settlers for copper liquid extraction systems |
| 03/01/1977 | US4010030 Removal of arsenic, antimony and bismuth from molten copper with sulfur hexafluoride |
| 02/22/1977 | US4009240 Method and apparatus for purifying blister furnace effluent |
| 02/15/1977 | US4008076 Hydrometallurgy |
| 02/15/1977 | US4008072 Sulfidization reaction |
| 02/01/1977 | US4006215 Recovering iron, nickel, or cobalt from sulfate solution |
| 02/01/1977 | US4006010 Production of blister copper directly from dead roasted-copper-iron concentrates using a shallow bed reactor |
| 02/01/1977 | US4005856 Process for continuous smelting and converting of copper concentrates |
| 01/25/1977 | US4005173 Steam stripping of ammoniacal solutions and simultaneous loading of metal values by organic acids |
| 01/18/1977 | US4003740 Recovery of copper from copper sulfide ores containing copper and iron |
| 01/18/1977 | US4003739 Copper extraction by arc heater |
| 01/11/1977 | US4002717 Refining of manganese oxide ores |
| 01/04/1977 | US4001013 Latent heat as accelerator |
| 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 |
| 11/09/1976 | US3990890 Process for refining molten copper matte with an enriched oxygen blow |
| 11/09/1976 | US3990889 Metallurgical process using oxygen |
| 11/02/1976 | US3989607 Copper di(2-ethylhexyl)phosphate |
| 11/02/1976 | US3989509 Catalytic hydrogen reduction of metals from solutions |
| 10/26/1976 | US3988416 Elevated pressure operation in the cuprion process |