Impurity removal from sodium chlorate

Details Impurity removal from sodium chlorate Impurity removal from sodium chlorate

C - Chemistry, Metallurgy

25

B

C25B 1/24 (2006.01) C25B 1/26 (2006.01) C25B 15/08 (2006.01)

Patent

CA 2181613

Control of sulfate and perchlorate impurity levels is provided in a procedure for manufacturing crystalline sodium chlorate by electrolyzing an aqueous solution of sodium chloride and crystallizing sodium chlorate from the resulting aqueous solution of sodium chlorate and sodium chloride. The mother liquor from the crystallization, or a portion thereof, is treated simultaneously with calcium chloride to remove sulfate ions by precipitating calcium sulfate and with potassium chloride to remove perchlorate ions by precipitating potassium perchlorate.

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