Gold inquartation process
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United States of America Patent
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Aug 15, 1989
Grant Date -
N/A
app pub date -
May 18, 1987
filing date -
Sep 12, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of refining a precious metal comprising the steps of inquarting the material containing the precious metal into an alloy, with a known quantity of a base metal to form an alloy of a known concentration of the precious metal, and dissolving the base metal in acid to leave the refined precious metal as a solid. Preferably the method is used to refine gold, and the acid used is nitric acid, followed by a secondary acid treatment of hydrochloric acid.
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