Method for re-use of aqueous co-product from manufacture of sodi

Details Method for re-use of aqueous co-product from manufacture of sodi Method for re-use of aqueous co-product from manufacture of sodi

1990-11-14

1994-02-01

Straub, Gary R.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

C01B 1766

Patent

active

052830462

ABSTRACT:
Aqueous co-product, produced by distillation of reaction filtrate from a batch reaction for manufacturing sodium dithionite by reacting sodium formate, sodium hydroxide, and sulfur dioxide in aqueous methanol solution, is rapidly evaporated to remove about 80% of its water content, so that only the determined quantity of water remains with its determined contents of alkali metal compounds, and is utilized as an admixed component of a succeeding batch.

REFERENCES:
patent: 3298796 (1967-01-01), Van-Weele et al.
patent: 3622216 (1986-11-01), Winslow et al.
patent: 3718732 (1973-02-01), Winslow, Jr. et al.
patent: 3961034 (1976-06-01), Bostian et al.
patent: 4283303 (1981-08-01), Ellis
patent: 4693880 (1987-09-01), Arakawa

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