Separation of isopropyl acetate from isopropanol by extractive d

Details Separation of isopropyl acetate from isopropanol by extractive d Separation of isopropyl acetate from isopropanol by extractive d

1986-03-05

1987-10-06

Bascomb, Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 58, 203 59, 203 60, 203 63, 560248, B01D 340, C07C 6748

Patent

active

046981373

ABSTRACT:
Isopropyl acetate cannot be completely removed from isopropyl acetate - isopropanol - water mixtures by distillation because of the presence of the minimum ternary azeotrope. Isopropyl acetate can be readily removed for mixtures containing it, isopropanol and water by using extractive distillation in which the extractive agent is higher boiling oxygenated or nitrogenous organic compound or a mixture of these. Typical examples of effective agents are dimethylformamide; dimethylformamide and triethanolamine; N,N-dimethylacetamide and N-methyl pyrrolidone.

REFERENCES:
patent: 2489619 (1949-11-01), Carlson et al.
patent: 2575285 (1951-11-01), Carlson et al.
patent: 4379028 (1983-04-01), Berg et al.
patent: 4469905 (1984-09-01), Inwood et al.
patent: 4507176 (1985-05-01), Berg et al.
patent: 4592805 (1986-06-01), Berg et al.

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