Recovery of ethylene glycol from butanediol isomers by azeotropi

Details Recovery of ethylene glycol from butanediol isomers by azeotropi Recovery of ethylene glycol from butanediol isomers by azeotropi

1990-07-05

1990-10-30

Bascomb, Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

Organic compound

203 63, 203 69, 568868, B01D 336, C07C 3120

Patent

active

049666584

ABSTRACT:
Ethylene glycol cannot be easily separated from 1,2-butanediol or 1,3-butanediol by atmospheric or reduced pressure distillation because of the closeness of their boiling points. Ethylene glycol can be readily separated from the butanediols by azeotropic distillation. Typical effective agents are ethyl benzene, 3-heptanone or diisobutyl ketone.

REFERENCES:
patent: 3859368 (1975-01-01), Kollar
patent: 4057471 (1977-11-01), Chueh
patent: 4151048 (1979-04-01), Becker
patent: 4187153 (1980-02-01), Peltzman
patent: 4276126 (1981-06-01), Saffer

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