Process for hydrometallurgic and electrochemical treatment of su

Details Process for hydrometallurgic and electrochemical treatment of su Process for hydrometallurgic and electrochemical treatment of su

1997-05-05

1998-05-12

Gorgos, Kathryn L.

Electrolysis: processes, compositions used therein, and methods

Electrolytic synthesis

Preparing single metal

C25C 122

Patent

active

057500193

ABSTRACT:
A hydrometallurgic and electrochemical process for processing sulfur antimony ores and residues is disclosed, the end products from which are electrolytic antimony and elemental sulfur. The concentrate of sulfur antimony ore, leached with a solution of caustic alkali according to the known techniques dissolves, as sulfur salts as much Sb as possible, whilst the other heavy and precious metals which accompany the antimony bearing ore remain unchanged in the residue. From the solution of antimony sulfur salts pure Sb.sub.2 S.sub.3 is precipitated by acidification and this sulfide, separated from the solution by filtration, is leached with a ferric fluoborate based electrolyte which oxidizes sulfide into elemental sulfur and dissolves antimony as Sb.sup.3+ fluoborate. The resulting mixture is filtered once more in order to separate elemental sulfur and the solution of Sb fluoborate is submitted to electrolysis in a diaphragm cell with electrolytic Sb being obtained at the cathodes, and regenerated ferric fluoborate being recycled to the step of Sb.sub.2 S.sub.3 leaching in the anodic compartment.

REFERENCES:
patent: 793039 (1905-06-01), Betts
patent: 3657081 (1972-04-01), Holmes
patent: 3883345 (1975-05-01), Caldon et al.
patent: 3986943 (1976-10-01), Lamb
patent: 5290338 (1994-03-01), Anderson et al.
Database WPI, Section Ch, Week 8605, Derwent Publications Ltd., London, GB; Class E32, AN 86-034139 XP002037185 & SU 167 225 A (Gidrotsvetmet), 15 Jul. 1985.

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