Separation of isopropyl ether from methyl ethyl ketone by extrac

Details Separation of isopropyl ether from methyl ethyl ketone by extrac Separation of isopropyl ether from methyl ethyl ketone by extrac

1984-02-10

1985-10-01

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, 568410, 568699, B01D 340

Patent

active

045444544

ABSTRACT:
Isopropyl ether cannot be completely removed from isopropyl ether - methyl ethyl ketone mixtures by distillation because of the presence of the minimum binary azeotrope. Isopropyl ether can be readily removed from mixtures containing it and methyl ethyl ketone by using extractive distillation in which the extractive distillation agent is a higher boiling oxygenated and/or nitrogenous organic compound or a mixture of these. Typical examples of effective agents are adiponitrile; ehtylene carbonate plus dimethylformamide; adiponitrile plus dimethylformamide plus glycerine.

REFERENCES:
patent: 2623845 (1952-12-01), Coutor
patent: 3198837 (1965-08-01), Smidt et al.
patent: 3228985 (1966-01-01), Carpenter et al.
patent: 3709928 (1973-01-01), Murayama et al.
patent: 4459179 (1984-07-01), Berg et al.
patent: 4469491 (1984-09-01), Finkel
patent: 4470881 (1984-09-01), Berg

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