Removal of manganese and chlorine ions from aqueous acidic...

Details Removal of manganese and chlorine ions from aqueous acidic... Removal of manganese and chlorine ions from aqueous acidic...

C - Chemistry, Metallurgy

25

C

53/322, 204/74

C25C 1/16 (2006.01)

Patent

CA 1166021

ABSTRACT OF THE DISCLOSURE A process for removing manganese and chlorine ions from an aqueous acidic sulphate solution containing zinc, manganese and chlorine ions without removing a substantial amount of zinc ions from the solution includes adjusting the free acidity of the solution if necessary to at least about 0.1 molar. The solution is then treated with ozone to oxidize manganese ions to manganese dioxide, and the ozone treatment is continued after the manganese concentra- tion has fallen to a low level to oxidize chlorine ions. The precipitated manganese dioxide is removed from the solution.

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