Method for recovering gold from activated carbon
AssigneeJX Nippon Mining & Metals Corporation
InventorsKazuhiro Hatano, Akira Yoshimura, Ryosuke Tatsumi
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Abstract
The present invention is intended for effectively removing copper, iron, sulfur, which are impurities, from activated carbon on which gold is adsorbed before gold eluting in the point of view of gold recovery, and is related to a method for eluting gold from an activated carbon on which at least sulfur (S) and gold (Au) are adsorbed, whereas the activated carbon is washed with an alkali solution before eluting the gold, and then the gold is eluted from the activated carbon.
Claims15
A method for eluting gold from an activated carbon on which at least sulfur (S) and gold (Au) are adsorbed, wherein the activated carbon is washed with an alkali solution to remove sulfur (S) before eluting the gold, and then the gold is eluted from the activated carbon.
A method for eluting gold from activated carbon on which at least sulfur (S) and gold (Au), as well as either or both of copper (Cu) and iron (Fe) are adsorbed, wherein the activated carbon is washed with an acid solution to remove copper (Cu) and iron (Fe) and an alkali solution to remove sulfur (S) before eluting the gold, and then the gold is eluted from the activated carbon.
Dependencies are inferred from the claim text.