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Class Information
Number: 75/718
Name: Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures > Processes > Producing or treating free metal > Below 300 degrees c > Using nonmetallic material which is liquid under standard conditions (e.g., hydrometallurgy, etc.) > Reducing to free metal with gas > Copper (cu) recovered as free metal
Description: Process wherein the free metal produced is Copper (Cu).

Sub-classes under this class:

Class Number Class Name Patents
75/719 Using sulfur dioxide 3

Patents under this class:

Patent Number Title Of Patent Date Issued
7594951 Process for engineered ion exchange recovery of copper and nickel Sep. 29, 2009
7494528 Method for smelting copper concentrates Feb. 24, 2009
6132491 Method and apparatus for dissociating metals from metal compounds extracted into supercritical fluids Oct. 17, 2000
5912402 Metallurgical dust recycle process Jun. 15, 1999
5820653 Process for making shaped copper articles Oct. 13, 1998
5616168 Hydrometallurgical processing of impurity streams generated during the pyrometallurgy of copper Apr. 1, 1997
5256187 Separation of precious metals by an ion exchange process Oct. 26, 1993
5207996 Acid leaching of copper ore heap with fluoroaliphatic surfactant May. 4, 1993
5135567 Method for producing metal powders from liquid phase containing metal ions Aug. 4, 1992
4895596 Method of recovering palladium catalyst Jan. 23, 1990
4518420 Winning metal from ore May. 21, 1985
4497659 Production of metals with low selenium contents Feb. 5, 1985
4331520 Process for the recovery of hydrogen-reduced metals, ions and the like at porous hydrophobic catalytic barriers May. 25, 1982
4322390 Hydrometallurgical recovery of copper, cobalt nickel with reductive and oxidative leaching Mar. 30, 1982
4304644 Autoclave oxidation leaching of sulfide materials containing copper, nickel and/or cobalt Dec. 8, 1981
4159232 Electro-hydrometallurgical process for the extraction of base metals and iron Jun. 26, 1979
4157912 Process for recovery of copper and zinc from complex sulphides Jun. 12, 1979
4148813 Nickel and cobalt solvent extraction with mercaptides Apr. 10, 1979
4138248 Recovery of elemental sulfur and metal values from tailings from copper recovery processes Feb. 6, 1979
4097271 Hydrometallurgical process for recovering copper and other metal values from metal sulphides Jun. 27, 1978
4093526 Hydrometallurgical leaching and refining of nickel-copper concentrates, and electrowinning of copper Jun. 6, 1978
4038361 Recovery of nitric acid soluble transition metals from sulfur and iron containing ores of the same Jul. 26, 1977
4036639 Production of copper Jul. 19, 1977
4020143 Use of raw manganese nodules for oxidation leaching of reductively roasted manganese nodules Apr. 26, 1977
4013457 Process for the recovery of cuprous chloride in the presence of metal impurities Mar. 22, 1977
3985553 Process for the recovery of copper and ammonium sulphate from copper-bearing mineral sulphide ores or concentrates Oct. 12, 1976
3972711 Cuprous chloride recovery process Aug. 3, 1976
3967957 Aqueous ammonia oxidative leach and recovery of metal values Jul. 6, 1976
3966462 Recovery of nitric acid soluble transition metals from sulfur and iron containing ores of the same Jun. 29, 1976
3965239 Recovery of nitric acid soluble transition metals from sulfur and iron containing ores of the same Jun. 22, 1976
3957506 Catalytic water treatment to recover metal value May. 18, 1976

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