Separation of isobutyl acetate from isobutanol by extractive dis

Details Separation of isobutyl acetate from isobutanol by extractive dis Separation of isobutyl acetate from isobutanol by extractive dis

1986-06-26

1988-02-09

Bascomb, Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 57, 203 58, 203 60, 560248, B01D 340

Patent

active

047240490

ABSTRACT:
Isobutyl acetate cannot be completely removed from isobutyl acetate - isobutanol - water mixtures by distillation because of the presence of the minimum ternary axeotrope. Isobutyl acetate can be readily removed from mixtures containing it, isobutanol and water 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; dimethylsulfoxide and dimethylformamide; dimethylsulfoxide, dimethylformamide and N,N-dimethylacetamide.

REFERENCES:
patent: 2489619 (1949-11-01), Carlson et al.
patent: 2559519 (1951-07-01), Smith et al.
patent: 2559520 (1951-07-01), Smith et al.
patent: 2575285 (1951-11-01), Carlson et al.
patent: 4379028 (1983-04-01), Berg et al.
patent: 4431838 (1984-02-01), Feldman et al.
patent: 4507176 (1985-03-01), Berg et al.
patent: 4525245 (1985-06-01), Berg et al.

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