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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.
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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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