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

1983-04-25

1984-07-10

Bascomb, Jr., Wilbur L.

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 62, 203 63, 203 64, 568699, B01D 340, C07C 4142

Patent

active

044591780

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, nitrogenous and/or sulfur containing organic compound or a mixture of these. Typical examples of effective agents are sulfolane; ethylene carbonate plus dimethylsulfoxide; adiponitrile plus dimethylformamide plus glycerine.

REFERENCES:
patent: 1442520 (1923-01-01), Buc
patent: 2444893 (1948-07-01), Lake
patent: 2570205 (1951-10-01), Carlson et al.
patent: 4012289 (1977-03-01), Haskell

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