C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/230
C22B 3/04 (2006.01) C22B 11/08 (2006.01)
Patent
CA 2012971
Heap leaching of gold/silver ores with an aqueous alkali cyanide solution containing a surfactant hydrolyzable at the pH of the solution, the surfactant being present in an amount sufficient to increase the rate of metal value recovery without adversely affecting the carbon efficiency in the subsequent step of separating the metal cyanide value from the pregnant leach solution by absorption on carbon columns.
Ashland Inc.
Gowling Lafleur Henderson Llp
Luttinger Lionel B.
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