Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1977-11-23
1979-01-23
Andrews, M. J.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75 23, 75 24, 75 72, 75 83, 75118R, 75172G, 75173C, 75165, C22C 900
Patent
active
041359232
ABSTRACT:
This invention relates to the extraction of metals. More particularly, the invention is concerned with the extraction of one or more precious metals from material containing such metals. By "precious metals", both here and throughout the remainder of this specification, meant gold, silver and the platinum group metals, platinum, palladium, rhodium, ruthenium, iridium and osmium. In particular the invention relates to a process for the extraction of precious metal from a material containing a precious metal selected from the group consisting of gold, silver, platinum, rhodium, ruthenium, iridium and osmium and including heating a mixture comprising the said material, copper sulphide or at least one precursor thereof and a flux.
REFERENCES:
patent: 722809 (1903-03-01), Carpenter
patent: 1896807 (1933-02-01), Bauer
Andrews M. J.
Johnson Matthey & Co., Limited
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