Separation of methyl acetate from methanol by extractive distill

Details Separation of methyl acetate from methanol by extractive distill Separation of methyl acetate from methanol by extractive distill

1984-02-17

1986-07-01

Bascomb, Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 56, 203 57, 203 58, 203 60, 203 64, 560248, B01D 340, C07C 6748

Patent

active

045978344

ABSTRACT:
Methyl acetate cannot be completely removed from methyl acetate - methanol mixtures by distillation because of the presence of the minimum binary azeotrope. Methyl acetate can be readily removed from mixtures containing it and methanol by using extractive distillation in which the extractive distillation agent is a higher boiling oxygenated, nitrogenous and/or sulfur containing organic compound or a mixture of these. Typical examples of effective agents are dimethylformamide; dimethylsulfoxide plus tetraethylene glycol, dimethylsulfoxide plus 1,5-pentanediol plus 1,6-hexanediol.

REFERENCES:
patent: 3268572 (1966-08-01), Knorr et al.
patent: 3431181 (1969-03-01), Bouniot
patent: 3709928 (1973-01-01), Murayama et al.
patent: 4379028 (1983-04-01), Berg et al.
patent: 4431838 (1984-02-01), Feldman et al.

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