Separation of methanol from acetone by extractive distillation

Details Separation of methanol from acetone by extractive distillation Separation of methanol from acetone by extractive distillation

1983-11-01

1985-02-26

Bascomb, Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 56, 203 57, 203 60, 203 62, 203 63, 568411, 568913, B01D 340, C07C 2984, C07C 3104, C07C 4908

Patent

active

045016453

ABSTRACT:
Methanol cannot be completely removed from its mixture with acetone by distillation because of the presence of the minimum binary azeotrope. Methanol can be readily removed from mixtures containing it and acetone by using extractive distillation to bring off the methanol as overhead product in a rectification column by using extractive distillation in which the extractive distillation agent is an effective higher boiling organic compound or a mixture of these. Typical examples of effective agents are acetophenone, 3-pentanone, 2,4-pentanedione, ethylacetoacetate, 2-butanone plus benzil.

REFERENCES:
patent: 2179991 (1939-11-01), Bright et al.
patent: 2617757 (1952-11-01), Michael
patent: 3031384 (1962-04-01), Sirois et al.
patent: 3073752 (1963-01-01), Mention
patent: 3419477 (1968-12-01), Mattia

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