Zinc recovery by chlorination leach

Details Zinc recovery by chlorination leach Zinc recovery by chlorination leach

1978-05-12

1980-06-03

Hearn, Brian E.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

75104, 75120, 423109, C25C 116, C22B 1922, C01G 904

Patent

active

042060230

ABSTRACT:
A process is disclosed for the separation and recovery of zinc from material in which it is contained as a sulfide. Zinc sulfide containing material is chlorinated in an aqueous medium in the presence of elemental chlorine and ferric/ferrous ions to form a solution containing zinc chloride, iron chloride and elemental sulfur. The solution is treated with elemental chlorine and alkali to precipitate the iron (e.g. at about pH 3 to 4). Zinc chloride is recovered from the solution by means known to those skilled in the art such as by electrolysis. The precipitated iron is recycled for use as a secondary chlorinating solution to treat the solid residue of the initial chlorination leaching step.

REFERENCES:
patent: 921312 (1909-05-01), Thwaites
patent: 1838857 (1931-12-01), Mitchell
patent: 3998628 (1976-12-01), Gandon

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