Distillation: processes – separatory – Adding material to distilland except water or steam per se – Organic compound
Patent
1991-11-01
1992-11-03
Bascomb, Jr., Wilbur
Distillation: processes, separatory
Adding material to distilland except water or steam per se
Organic compound
203 14, 203 78, 203 84, 549541, B01D 340, C07D30132
Patent
active
051605872
ABSTRACT:
An extractive distillation agent consisting essentially of dipropylene glycol 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 dipropylene glycol, water and acetone and some of the methanol introduced into the distillation column.
REFERENCES:
patent: 3265593 (1966-08-01), Leis et al.
patent: 3578568 (1971-05-01), Washall
patent: 3838020 (1974-09-01), Kageyama et al.
patent: 5000825 (1991-03-01), Shih
Culbreth, III William K.
Marquis Edward T.
Pottratz David G.
Sheu Yu-Hwa E.
Speranza George P.
Bascomb, Jr. Wilbur
Park Jack H.
Priem Kenneth R.
Ries Carl G.
Texaco Chemical Company
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