Separation of propylene glycol from 1,2-butanediol by azeotropic

Details Separation of propylene glycol from 1,2-butanediol by azeotropic Separation of propylene glycol from 1,2-butanediol by azeotropic

1994-07-05

1995-06-13

Bascomb, Jr., Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

Organic compound

203 69, 203 70, 568868, B01D 336, C07C 2982, C07C 3120

Patent

active

054239559

ABSTRACT:
Propylene glycol is difficult to separate from 1,2-butanediol by conventional distillation or rectification because of the proximity of their boling points. Propylene glycol can be readily separated from 1,2-butanediol by azeotropic distillation. Effective agents are 2,2-dimethyl butane, 3-carene and diethyl benzene.

REFERENCES:
patent: 4028195 (1977-06-01), Becker et al.
patent: 4935102 (1990-06-01), Berg
patent: 4966658 (1990-10-01), Berg
patent: 4980033 (1909-12-01), Berg

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