Manufacture of sodium dithionite

Details Manufacture of sodium dithionite Manufacture of sodium dithionite

1975-08-12

1977-04-12

Thomas, Earl C.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

C01B 1766

Patent

active

040175936

ABSTRACT:
For the preparation of anhydrous sodium dithionite by the reaction of sulfur dioxide with sodium formate and caustic soda in the presence of organic solvents, sulfur dioxide is passed, together with the formate, into a liquid containing all of the caustic soda required for the reaction. This initial liquid may contain, in addition to the caustic soda, a portion of the sulfur dioxide or formate required for the reaction.

REFERENCES:
patent: 2010615 (1935-08-01), Vanderbilt et al.
patent: 3714340 (1973-01-01), Fujiwara et al.
patent: 3917807 (1975-11-01), Yasue et al.

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