Recovery of glycerine from polyols by azeotropic distillation

Details Recovery of glycerine from polyols by azeotropic distillation Recovery of glycerine from polyols by azeotropic distillation

1990-04-06

1990-12-04

Bascomb, Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

Organic compound

203 68, 203 69, 203 70, 568621, 568869, B01D 336, C07C 2982

Patent

active

049751581

ABSTRACT:
Glycerine cannot be easily separated from triethylene glycol and 1,2,4-butanetriol by atmospheric or reduced pressure distillation because of the closeness of their boiling points. Glycerine can be readily separated from triethylene glycol and 1,2,4-butanetriol by azeotropic distillation. Typical effective agents are m-xylene, dipentene and 2-methoxyethyl ether.

REFERENCES:
patent: 2865819 (1958-12-01), Hagemeyer et al.
patent: 3809724 (1974-05-01), Golden
patent: 3847754 (1974-11-01), Oliver
patent: 3859368 (1975-01-01), Kollar
patent: 4021311 (1977-05-01), Becker
patent: 4057471 (1977-11-01), Chueh
patent: 4655879 (1987-04-01), Brockmann et al.

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