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Class Information
Number: 75/731
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 > Utilizing leaching agent containing sulfur(s)
Description: Process which utilizes a Sulfur (S) containing chemical agent to leach the metalliferous material.

Patents under this class:

Patent Number Title Of Patent Date Issued
7125436 Method for improving metals recovery using high temperature pressure leaching Oct. 24, 2006
6319389 Recovery of copper values from copper ores Nov. 20, 2001
5820653 Process for making shaped copper articles Oct. 13, 1998
5788740 Method for the hydrometallurgical separation and recovery of biological nutrients, lead, gypsum and cadmium from raw materials Aug. 4, 1998
5730776 Hydrometallurgical process for the extraction of copper from sulphidic concentrates Mar. 24, 1998
5019273 Method for recovery of heavy metals from highly concentrated wastewater solutions May. 28, 1991
4789446 Method of processing residues from the hydrometallurgical production of zinc Dec. 6, 1988
4610723 Process for leaching sulphide concentrates of the tetrahedrite type containing high concentrations of arsenic and antimony Sep. 9, 1986
4497659 Production of metals with low selenium contents Feb. 5, 1985
4304599 Heavy metal removal process Dec. 8, 1981
4294434 Heavy metal removal apparatus Oct. 13, 1981
4274931 Leaching process for zinc sulphide containing materials Jun. 23, 1981
4240826 Process for the recovery of arsenic as a zinc arsenate and its _utilization in the purification of zinc plant electrolytes Dec. 23, 1980
4225342 Treatment of zinc plant leach residues for recovery of the contained metal values Sep. 30, 1980
4219354 Hydrometallurgical process for the treatment of oxides and ferrites which contain iron and other metals Aug. 26, 1980
4168970 Purification of zinc sulphate solutions Sep. 25, 1979
4107265 Treating residues from the leaching of roasted zinc blende Aug. 15, 1978
4093526 Hydrometallurgical leaching and refining of nickel-copper concentrates, and electrowinning of copper Jun. 6, 1978
3957602 Recovery of copper from chalcopyrite utilizing copper sulfate leach May. 18, 1976
3933478 Recovery of zinc and copper from brass scrap Jan. 20, 1976
3930847 Recovery of copper by cementation Jan. 6, 1976

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