Method of producing zinc from chloride solutions which...

Details Method of producing zinc from chloride solutions which... Method of producing zinc from chloride solutions which...

C - Chemistry, Metallurgy

25

C

53/329, 204/74

C25C 1/16 (2006.01) C01G 9/00 (2006.01) C22B 3/38 (2006.01)

Patent

CA 1170211

ABSTRACT Selective extraction of zinc from chloride solutions which contain iron, copper and zinc, where the zinc is extracted in organic phase by means of tri-n- butylphosphate in an organic solvent. The extraction is carried out on chloride solutions in which the lead content, if present, is lowered and where the copper contents is maximum 50 g/l, higher copper concentration being reduced for instance by electrolysis in diaphragm cell. The zinc containing organic phase is washed, and zinc back- extracted and conducted to a diaphragm cell for electrolysis of zinc, the used electrolyte being returned to the back extraction step. The raffinate from the zinc extraction is used for repeated leaching of metals after preceding reoxidation.

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