Dehydration of propanoic acid by extractive distillation

Details Dehydration of propanoic acid by extractive distillation Dehydration of propanoic acid by extractive distillation

1986-04-07

1987-06-02

Bascomb, Wilbur

Distillation: processes, separatory

Distilling to separate or remove only water

From organic compound

203 51, 203 57, 203 60, 562606, B01D 340

Patent

active

046701052

ABSTRACT:
Propanoic acid cannot be completely removed from propanoic-water mixtures by distillation because of the presence of the minimum azeotrope. Propanoic acid can be readily removed from mixtures containing it and water by using extractive distillation in which the extractive distillation agent is an acid amide. Typical examples of effective agents are acetamide; dimethylformamide and methyl glutaronitrile; formamide, adiponitrile and N,N-dimethylacetamide.

REFERENCES:
patent: 1843434 (1932-02-01), Wietzel et al.
patent: 3951755 (1976-04-01), Sartorius et al.
patent: 4217460 (1980-08-01), Hohenschutz et al.
patent: 4262140 (1981-04-01), Bott et al.
patent: 4358609 (1982-11-01), Hardy
patent: 4551208 (1985-11-01), Bott et al.
patent: 4576683 (1986-03-01), Cohen

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