Patent ID: 6126807
Filing Date: 2000-10-03
Classification: C01G,C01P,C25D

Abstract:
A process for producing a sodium gold sulfite solution, comprising:(a) dissolving Ba(OH).sub.2 in an aqueous solution of Na(AuCl.sub.4) to produce a mixture;(b) mixing NaOH with said mixture to produce a suspension;(c) boiling the resulting suspension;(d) adjusting the pH of the suspension from step (c) to produce a precipitate and a filtrate;(e) dissolving Na.sub.2 SO.sub.3 in a slurry of the precipitate from step (d) to produce a suspension;(f) heating the suspension from step (e);(g) filtering the suspension from step (f) to produce a filter cake and a filtrate; and(h) recovering filtrate as sodium gold sulfite in solution.