Dehydration of ethanol by extractive distillation

Details Dehydration of ethanol by extractive distillation Dehydration of ethanol by extractive distillation

1985-12-23

1986-12-23

Bascomb, Wilbur

Distillation: processes, separatory

Distilling to separate or remove only water

From organic compound

203 51, 203 56, 203 60, 203 61, 203 62, 203 63, 203 64, 203 65, 203 71, 203DIG13, 568916, B01D 340, C07C 2984

Patent

active

046311157

ABSTRACT:
Water cannot be completely removed from ethanol by distillation because of the presence of the minimum azeotrope. Ethanol can be readily dehydrated by using extractive distillation in which the water is removed as overhead product and the ethanol and extractive agent as bottoms and subsequently separated by conventional rectification. Typical examples of suitable extractive agents are methyl benzoate; trimellitic anhydride and methyl benzoate; dipropylene glycol dibenzoate, ethyl salicylate and resorcinol.

REFERENCES:
patent: 2591671 (1952-04-01), Catterall
patent: 2901404 (1959-08-01), Kirshenbaum et al.
patent: 4349416 (1982-09-01), Brandt et al.
patent: 4366032 (1982-12-01), Mikitenko et al.
patent: 4400241 (1983-08-01), Braithwaite et al.
patent: 4428798 (1984-01-01), Zudkevitch et al.
patent: 4455198 (1984-06-01), Zudkevitch et al.

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