Purification of alkali metal hydroxides

Details Purification of alkali metal hydroxides Purification of alkali metal hydroxides

C - Chemistry, Metallurgy

01

D

23/276

C01D 1/28 (2006.01)

Patent

CA 1186489

Abstract of the Disclosure A method to purify an aqueous solution of an alkali metal hydroxide by countercurrently contacting the ammonia and hydroxide, in a volume ratio of from 0.6:1 to 1:1, in a packed bed. The temperature in the lower portion of an extractor in which the process is carried out is controlled and maintained within a range of from 68° to 77°C.

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