Process for separating ethylene oxide from aqueous solutions

Details Process for separating ethylene oxide from aqueous solutions Process for separating ethylene oxide from aqueous solutions

1981-11-16

1984-03-20

Bascoomb, Jr., Wilbur L.

Distillation: processes, separatory

Distilling to separate or remove only water

From organic compound

203 43, 203 49, 203 67, 203 68, 203 70, 549541, B01D 334, C07D30132

Patent

active

044379390

ABSTRACT:
Ethylene oxide is extracted from aqueous solutions by carbon dioxide under (near) super-critical conditions and thereafter recovered by distillation at sub-critical conditions. Improved distillation is obtained by adding to the carbon dixoide a gas (or gases) which adjust the critical temperature of the gas mixture of the top of the distillation column within the range of about 32.degree. C. to about 75.degree. C. Preferred gases are the saturated hydrocarbons, particularly propane, n-butane, isobutane and pentane.

REFERENCES:
patent: 2771473 (1956-11-01), Courter
patent: 3265593 (1966-08-01), Leis et al.
patent: 3418338 (1968-12-01), Gilman et al.
patent: 3964980 (1976-06-01), Ozero
patent: 3969196 (1976-07-01), Zosel
patent: 4349415 (1982-09-01), De Filippi et al.

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