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

1985-03-07

1987-02-10

Bashore, S. Leon

Distillation: processes, separatory

Adding material to distilland except water or steam per se

Organic compound

203 18, 203DIG21, 560248, B01D 340

Patent

active

046421670

ABSTRACT:
Isobutyl acetate cannot be completely removed from isobutyl acetate--isobutanol--water mixtures by distillation because of the presence of the minimum ternary azeotrope. 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 N,N-dimethylacetamide; dimethylformamide and dimethylsulfoxide; acetamide, dimethylformamide and dipropylene glycol.

REFERENCES:
patent: 1854385 (1932-04-01), Van Schaak, Jr.
patent: 2171550 (1939-09-01), Gordon
patent: 2386927 (1945-10-01), Boyd, Jr.
patent: 2570205 (1951-10-01), Carlson et al.
patent: 2993841 (1961-07-01), Sarno
patent: 4379028 (1983-04-01), Berg et al.
patent: 4507176 (1985-03-01), Berg et al.

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