Purification of contaminated propylene oxide by extractive disti

Distillation: processes – separatory – Adding material to distilland except water or steam per se – Organic compound

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

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active

051548038

ABSTRACT:
An extractive distillation agent consisting essentially of 2-methyl-2,4-pentanediol is fed to an extractive distillation column used for the distillation of propylene oxide contaminated with water, acetone and methanol to obtain an overhead distillate fraction consisting of essentially anhydrous propylene oxide contaminated with reduced quantities of acetone and methanol, and a heavier bottoms distillation fraction containing substantially all of the 2-methyl-2,4-pentanediol, water and acetone and some of the methanol introduced into the distillation column.

REFERENCES:
patent: 3265593 (1966-08-01), Leis et al.
patent: 3326780 (1967-06-01), Wiist
patent: 3578568 (1971-05-01), Washall
patent: 3838020 (1974-09-01), Kageyama et al.
patent: 5000825 (1991-03-01), Shih et al.

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