Method for the recovery of gold value

Details Method for the recovery of gold value Method for the recovery of gold value

1994-09-16

1995-07-04

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

423 24, C22B 342

Patent

active

054296609

ABSTRACT:
An efficient method is proposed for the recovery of gold value contained in an aqueous solution even in a very low concentration of the ppb level. Namely, an aqueous acidic solution containing gold value in the form of complex gold anions, e.g., chloro complex anions of gold, is contacted with a solid ion exchanger which is prepared by the adsorption of a 2-hydroxyethyl tri(C.sub.8-12)alkyl ammonium halide on porous resin beads of a polymer of methacrylic acid ester so that the complex gold anions are adsorbed by the ion exchange reaction to form ion pairs with the quaternary ammonium cations. The thus adsorbed complex gold anions coupled with the quaternary ammonium cations can be eluted out of the adsorbent with an organic solvent such as alcohols and ketones in a quantitative yield of recovery.

REFERENCES:
patent: 4894407 (1990-01-01), Miller et al.
patent: 5340380 (1994-08-01), Virnig

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