B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 39/18 (2006.01) B01J 49/00 (2006.01) C01B 17/90 (2006.01)
Patent
CA 2118208
- 24 - ABSTRACT OF THE DISCLOSURE 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.
Dreisinger David B.
Leong Brenna J. Y.
Nadeau Francois
University Of British Columbia
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