Use of mixed polyoxypropylene glycols in the extractive...

Details Use of mixed polyoxypropylene glycols in the extractive... Use of mixed polyoxypropylene glycols in the extractive...

C - Chemistry, Metallurgy

07

D

C07D 303/04 (2006.01) B01D 3/40 (2006.01) C07D 301/32 (2006.01)

Patent

CA 2146409

An extractive distillation agent comprising a mixture of polyoxypropylene glycols is fed to an extractive distillation column used for the distillation of propylene oxide contami- nated with water, acetone and methanol to obtain an overhead distillate fraction consisting of essentially anhydrous propylene oxide contaminated with reduced quantities of methanol, and a heavier bottoms distillation fraction con- taining substantially all of the polyoxypropylene glycols, water and acetone and some of the methanol introduced into the distillation column.

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