Chemistry of inorganic compounds – Sulfur or compound thereof – Oxygen containing
Patent
1993-10-19
1994-11-22
Straub, Gary P.
Chemistry of inorganic compounds
Sulfur or compound thereof
Oxygen containing
204106, 204DIG13, 210688, 210912, 423 87, C01B 1790, C02F 142, C25C 114
Patent
active
053667158
ABSTRACT:
The present invention is concerned with a method for selectively removing antimony and bismuth from an impure sulphuric acid solution containing at least 50 g/L of acid and some concentration of ferric ion (for example copper refinery electrolyte), is disclosed. The method involves contacting the impure solution with a sufficient quantity of finely divided metallic copper so as to prereduce all ferric ion present in the solution to the ferrous oxidation state. The prereduced solution is then contacted with a chelating resin. The method avoids the deleterious loading of ferric iron onto the ion exchange resin and prevents the return of excessive amounts of chloride ion with the purified electrolyte.
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Sasaki et al., "Hydrometallurgy and metallurgy of copper", vol. III, 1991, 245-254 no month.
Dreisinger David B.
Leong Brenna J. Y.
Straub Gary P.
The University of British Columbia
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