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METHOD FOR RE-USE OF AQUEOUS CO-PRODUCT FROM MANUFACTURE OF SODIUM DITHIONITE
METHOD FOR RE-USE OF AQUEOUS CO-PRODUCT FROM MANUFACTURE OF SODIUM DITHIONITE
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机译:连二亚硫酸钠生产中水副产物的再利用方法
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摘要
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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