Method of extracting silver and gold from their ores by dissolving them in a dilute solution of sodium cyanide or potassium cyanide. The processinvented in 1887 by the Scottish chemists John S. MacArthur, Robert W. Forrest, and William Forrestincludes contacting the finely ground ore with the cyanide solution, separating unwanted solids from the clear solution, and recovering the precious metals from the solution by precipitation with zinc dust.
Variants of CYANIDE PROCESS
cyanide process or MacArthur-Forrest process
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