Ammonium chloride-ammonium hydroxide strip for the recovery...

Details Ammonium chloride-ammonium hydroxide strip for the recovery... Ammonium chloride-ammonium hydroxide strip for the recovery...

C - Chemistry, Metallurgy

01

G

23/156

C01G 9/04 (2006.01)

Patent

CA 1225817

Abstract Anhydrous zinc chloride is produced from an aqueous feed solution containing zinc chloride. The zinc chloride is extracted onto an organic extractant known to the art such as tributyl phosphate, primary, secondary or tertiary amine, and quarternary amine salts. The loaded extractant is then stripped with aqueous stripping solution containing ammonium chloride and ammonium hydroxide. The zinc amine chloride formed in this aqueous stripping solution is separated from the stripping solution and can then be heated to form anhydrous zinc chloride and ammonia. This anhydrous zinc chloride is suitable as a feed material to a fused salt electrolysis process for the production of zinc.

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