Hydrosulfite preparation

Details Hydrosulfite preparation Hydrosulfite preparation

1978-04-14

1979-06-12

Cooper, Jack

Compositions

Reductive bleachant, deoxidant, reductant, or generative

Sulfur containing reductant, bleachant, deoxidant, or...

423265, 423515, C01B 1766

Patent

active

041579801

ABSTRACT:
Aluminum metal is activated with hydrochloric acid and then reacted with an aqueous solution of sulfur dioxide to produce an aluminum hydrosulfite (dithionite) liquor useful for bleaching materials such as clay. The aluminum hydrosulfite can be converted to a sodium hydrosulfite liquor by precipitating aluminum with a sodium base.

REFERENCES:
patent: 791675 (1905-06-01), Descamps
Smith et al., "Pulp & Paper Mag., Canada, Proceeding of the Technical Section", D79-85 (1971).

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