Process for the recovery of gold from anode slimes
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United States of America Patent
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Dec 12, 2017
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May 21, 2015
filing date -
Oct 19, 2012
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Abstract
An apparatus for the recovery of gold from a gold-bearing aqueous filtrate, the process comprising the steps of:
- (A) Contacting the aqueous filtrate with dibutyl carbitol (DBC) in a two-stage solvent extraction process to remove the gold from the aqueous filtrate into the DBC to form a gold-loaded DBC; and(D) Contacting the gold-loaded DBC with an aqueous acid scrub of hydrochloric acid in a four-stage countercurrent scrub process to remove impurities, e.g., non-gold metal, from the DBC into the aqueous scrub solution to form an impurity-loaded aqueous scrub.
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