Extraction of gold and silver

Details Extraction of gold and silver Extraction of gold and silver

C - Chemistry, Metallurgy

22

B

53/225

C22B 11/08 (2006.01)

Patent

CA 1107077

EXTRACTION OF GOLD AND SILVER ABSTRACT OF THE DISCLOSURE A process for the extraction of gold and silver from their ores in which the ore is reduced to a particle size of 1 mm or less and mixed with a lixiviant e.g. alkaline sodium or potassium cyanide, in an amount to provide a liquor content of about 8 to 12%, the lixiviant coated particles are allowed to react for a time sufficient for the lixiviant to extract the noble metal and the particles washed with water to obtain a solution of the noble metal salt from which the noble metal is recovered.

297918

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