Patent ID: 6228334
Filing Date: 2001-05-08
Classification: B01D,C22B,Y02P

Abstract:
A method for recovering gold from gold-loaded fine carbon residue from a coarse carbon gold recovery process, comprising the steps of:(a) mixing the gold-loaded fine carbon residue with coarse carbon and an aqueous solution of a transfer reagent to form a coarse-carbon-containing slurry;(b) retaining the coarse carbon in the coarse-carbon-containing slurry for a time period sufficient to transfer gold from the gold-loaded fine carbon residue to the coarse carbon, such that the coarse-carbon becomes gold-loaded and the fine carbon becomes gold-depleted;(c) separating the gold-loaded coarse carbon from the coarse-carbon-containing slurry thereby leaving a coarse-carbon-free slurry including gold-depleted fine carbon; and(d) recovering the transferred gold from the gold-loaded coarse carbon.