Dehydration of ethanol by extractive distillation

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

1986-01-02

1987-03-31

Bascomb, Wilbur

Distillation: processes, separatory

Distilling to separate or remove only water

From organic compound

203 51, 203 56, 203 58, 203 60, 203 61, 203 63, 203 64, 203 65, 203 71, 203DIG13, B01D 340, C07C 2984

Patent

active

046541233

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 hexahydrophthalic anhydride; methyl tetrahydrophthalic anhydride and pentanol-1; trimellitic anhydride, ethyl salicylate and resorcinol.

REFERENCES:
patent: 1796059 (1931-03-01), Suida
patent: 2591671 (1952-04-01), Catterall
patent: 4349416 (1982-09-01), Brandt et al.
patent: 4366032 (1982-12-01), Mikitenko et al.
patent: 4428798 (1984-01-01), Zudkevitch et al.
patent: 4455198 (1984-06-01), Zudkevitch et al.
patent: 4559109 (1985-12-01), Lee et al.

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