Dehydration of formic acid by extractive distillation

Details Dehydration of formic acid by extractive distillation Dehydration of formic acid by extractive distillation

1991-12-09

1992-12-22

Bascomb, Jr., Wilbur

Distillation: processes, separatory

Distilling to separate or remove only water

From organic compound

203 51, 203 56, 203 57, 203 60, 203 61, 203 62, 203 63, 203 65, 562609, B01D 340, C07C 5302

Patent

active

051731568

ABSTRACT:
Formic acid cannot be completely removed from formic acid--water mixtures by distillation because of the presence of the maximum azeotrope. Formic acid can be readily removed from mixtures containing it and water by using extractive distillation in which the extractive distillation agent is cyclohexanone, isophorone or a mixture of these with certain organic compounds. Typical examples of effective agents are cyclohexanone; isophorone; cyclohexanone and neodecanoic acid; isophorone and diisobutyl ketone.

REFERENCES:
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patent: 3040094 (1962-06-01), Stine et al.
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patent: 4353784 (1982-10-01), Koga et al.
patent: 4729818 (1988-03-01), Berg
patent: 4735690 (1988-04-01), Berg et al.
patent: 4786370 (1988-11-01), Berg

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