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

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

C - Chemistry, Metallurgy

01

D

23/100, 23/97

C01D 5/02 (2006.01) C01B 17/66 (2006.01) C01D 5/18 (2006.01)

Patent

CA 2016353

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.

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