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Cyanide process, also called Macarthurforrest Process, method of extracting silver and gold from their ores by dissolving them in a dilute solution of sodium cyanide or potassium cyanide. The process was invented in 1887 by the Scottish chemists John S. MacArthur, Robert W. Forrest, and William Forrest.
Cyanidation, or the metallurgical process of extracting gold from ore with cyanide leaching agents, has long been a primary method of gold beneficiation.
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Gold cyanidation – Wikipedia, the free encyclopedia. Cyanide was not applied to extraction of gold ores until 1887, when the MacArthurForrest Process was developed ...
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