Removal of water and methanol from propylene oxide by extractive

Details Removal of water and methanol from propylene oxide by extractive Removal of water and methanol from propylene oxide by extractive

1991-11-01

1992-09-08

Bascomb, Jr., Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 14, 203 58, 203 78, 203 84, 549541, B01D 340, C07D30132

Patent

active

051455617

ABSTRACT:
An extractive distillation agent consisting essentially of ethylene carbonate, propylene carbonate or a mixture thereof is fed to an extractive distillation column used for the distillation of propylene oxide contaminated with water to obtain an overhead distillate fraction consisting of essentially anhydrous propylene oxide, and a heavier bottoms distillation fraction containing substantially all of the extraction distillation solvent and water introduced into the distillation column.

REFERENCES:
patent: 3838020 (1974-09-01), Kageyama et al.
patent: 3881996 (1975-05-01), Schmidt
patent: 4971661 (1990-12-01), Meyer et al.

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