Purification of alkali metal hydrosulfite solutions

Details Purification of alkali metal hydrosulfite solutions Purification of alkali metal hydrosulfite solutions

1991-07-17

1992-03-24

Morris, Theodore

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkali metal

423629, 423630, 423512A, 423515, 423517, C01D 516

Patent

active

050986791

ABSTRACT:
A process for treating an alkali metal hydrosulfite solution which comprises contacting the alkali metal hydrosulfite solution with aluminum in a reaction mixture, and admixing carbon dioxide gas with the reaction mixture to remove dissolved aluminum as an aluminum-containing precipitate, the alkali metal hydrosulfite solution having a residual alkalinity of from about 0.1 to about 20 grams per liter of hydroxide ion.

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patent: 4590058 (1986-05-01), Cawlfield
patent: 5034202 (1991-07-01), Knollmueller
F. Foerster and E. T. Mommsen, Chem. Ber. 57, pp. 258-263 (1924) Chem. Abstracts 18, 1254 (1924).

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