Process for treating the mother liquor by cooling in the product

Details Process for treating the mother liquor by cooling in the product Process for treating the mother liquor by cooling in the product

1976-05-18

1977-08-16

Cooper, Jack

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

23296, 23302T, 260488F, 423514, 423512A, 423184, 423199, 203 74, C01B 1766

Patent

active

040426742

ABSTRACT:
In the production of anhydrous sodium dithionite by reacting sodium formate, an alkaline sodium compound and sulfurous acid anhydride in hydrous methanol, a process for treating the mother liquor, which comprises cooling the mother liquor left after the separation of the resulting anhydrous sodium dithionite to a temperature in the range of +5.degree. to -30.degree. C, and separating the precipitated sodium thiosulfate by filtration.

REFERENCES:
patent: 3718732 (1973-02-01), Winslow et al.
patent: 3961034 (1976-06-01), Bostian et al.

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