Manufacture of aqueous methanolic solution of sodium formate

Details Manufacture of aqueous methanolic solution of sodium formate Manufacture of aqueous methanolic solution of sodium formate

1979-06-05

1980-12-02

Cooper, Jack

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

423515, C01B 1766, C07C 5306

Patent

active

042373182

ABSTRACT:
In a process for the manufacture of sodium dithionite by reacting sulfur dioxide with sodium formate and aqueous sodium hydroxide solution in the presence of methanol, an aqueous methanolic solution of sodium formate is first produced by reacting carbon monoxide with sodium hydroxide solution in an aqueous medium, containing from 1 to 50% by weight of methanol, based on the amount of water, at from 80 to 120.degree. C. under a pressure of from 10 to 40 bars. The resulting aqueous methanolic solution can be reacted directly, in the conventional manner, with sulfur dioxide and aqueous sodium hydroxide solution to give sodium dithionite.

REFERENCES:
patent: 2281715 (1942-05-01), Rogers
patent: 3262973 (1966-07-01), Swaron
patent: 3714340 (1973-01-01), Fujiwara et al.

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