Recovery of anhydrous zinc chloride

Details Recovery of anhydrous zinc chloride Recovery of anhydrous zinc chloride

C - Chemistry, Metallurgy

01

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23/156

C01G 9/04 (2006.01) C01G 9/00 (2006.01) C22B 3/28 (2006.01) C22B 3/38 (2006.01)

Patent

CA 1227321

Abstract A process for the recovery of anhydrous zinc chloride from aqueous solutions containing zinc chloride and typical impurities, comprising: extrac- ting zinc chloride onto a suitable organic extrac- tant such as TBP; stripping the organic extractant with an organic reagent immiscible in the extractant, such as methanol or ethylene glycol; adding ammonia or other ammine donor to the loaded organic strip to precipitate a zinc chloride-ammine composition which may be decomposed to anhydrous zinc chloride by heating. The anhydrous zinc chloride is of high purity suitable for fused salt electrolysis to produce elemental zinc.

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