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

1983-04-14

1985-09-24

Bascomb, Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

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

Patent

active

045431647

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 dimethylsulfoxide; glycerine plus propylene glycol; ethylene glycol plus DMSO plus 1,5-pentanediol. Methanol can be removed as the overhead product from methyl acetate when the extractive distillation agent is nitrobenzene, propylene carbonate or ethylene glycol phenyl ether.

REFERENCES:
patent: 4349416 (1982-09-01), Brandt et al.
patent: 4379028 (1983-04-01), Berg et al.

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