Purification of alkali metal hydroxides

Details Purification of alkali metal hydroxides Purification of alkali metal hydroxides

1980-05-27

1983-02-08

Vertiz, O. R.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkali metal

423643, C01D 104

Patent

active

043729240

ABSTRACT:
A method to purify an aqueous solution of an alkali metal hydroxide by countercurrently contacting the ammonia and hydroxide, in a volume ratio of about 0.6 to 1 to about 1 to 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 at least about 155.degree. to about 170.degree. F.

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