Purification of propylene oxide using ethylene glycol monomethyl

Details Purification of propylene oxide using ethylene glycol monomethyl Purification of propylene oxide using ethylene glycol monomethyl

1997-08-27

1999-09-28

Manoharan, Virginia

Distillation: processes, separatory

Adding material to distilland except water or steam per se

Organic compound

203 14, 203 78, 203 80, 549541, B01D 340, C07D30132

Patent

active

059581921

ABSTRACT:
An extractive distillation agent used for the distillation of propylene oxide contaminated with water, acetone, acetaldehyde and methanol and consisting essentially of ethylene glycol monomethyl ether is fed to an extractive distillation column within about 2 to about 15 stages from the top of the tower to obtain an overhead distillate fraction consisting of essentially anhydrous propylene oxide contaminated with reduced quantities of acetone, acetaldehyde and methanol, and a heavier bottoms distillation fraction containing substantially all of the ethylene glycol monomethyl ether, water and acetone and some of the methanol introduced into the distillation column.

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