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Class Information
Number: 75/728
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.) > Displacing by another metal (i.e., electromotive series) > Copper(cu) recovered as free metal > And injecting or pressurizing with air or oxygen
Description: Process wherein air or Oxygen is injected into the liquid or process wherein the liquid is subjected to treatment with air or Oxygen at pressures exceeding atmospheric pressure.

Patents under this class:

Patent Number Title Of Patent Date Issued
5917116 Method for the processing of copper minerals Jun. 29, 1999
5795465 Process for recovering copper from copper-containing material Aug. 18, 1998
5730776 Hydrometallurgical process for the extraction of copper from sulphidic concentrates Mar. 24, 1998
4786323 Process for the recovery of noble metals from ore-concentrates Nov. 22, 1988
4610723 Process for leaching sulphide concentrates of the tetrahedrite type containing high concentrations of arsenic and antimony Sep. 9, 1986
4384890 Cupric chloride leaching of copper sulfides May. 24, 1983
4304644 Autoclave oxidation leaching of sulfide materials containing copper, nickel and/or cobalt Dec. 8, 1981
4274931 Leaching process for zinc sulphide containing materials Jun. 23, 1981
4249939 Method of disposing of spent organic complexing solutions containing cuprous halides Feb. 10, 1981
4166737 Method for dissolving the non-ferrous metals contained in oxygenated compounds Sep. 4, 1979
4149945 Hydrometallurgical brass dust reclamation Apr. 17, 1979
4149880 Recovery of copper from arsenic containing metallurgical waste materials Apr. 17, 1979
4107009 Recovery of copper from ores and concentrates Aug. 15, 1978
4093526 Hydrometallurgical leaching and refining of nickel-copper concentrates, and electrowinning of copper Jun. 6, 1978
4063933 Process for the treatment of complex lead-zinc concentrates Dec. 20, 1977
4053305 Recovery of copper and silver from sulfide concentrates Oct. 11, 1977
4030917 Hydrometallurgical processing of metal sulfides Jun. 21, 1977
3957602 Recovery of copper from chalcopyrite utilizing copper sulfate leach May. 18, 1976

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