Separation of formic acid from acetic acid by extractive distill

Details Separation of formic acid from acetic acid by extractive distill Separation of formic acid from acetic acid by extractive distill

1993-01-29

1993-07-13

Bascomb, Jr., Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 57, 203 61, 562608, 562609, B01D 340, C07C 5302, C07C 5144

Patent

active

052270297

ABSTRACT:
Formic acid cannot be easily removed from formic acid-acetic acid mixtures by distillation because of the closeness of their boiling points. Formic acid can be readily removed from mixtures containing it and acetic acid by extractive distillation. Typical effective agents are 2-nitrotoluene, 1-nitropropane and m-nitrobenzoic acid.

REFERENCES:
patent: 3394058 (1968-07-01), Hohenschutz
patent: 3437566 (1969-04-01), Gasser et al.
patent: 3660483 (1972-05-01), Hobbs et al.
patent: 3801629 (1974-04-01), Aga et al.
patent: 4110372 (1978-08-01), Hey et al.
patent: 4576683 (1986-03-01), Cohen
patent: 4692219 (1987-09-01), Berg
patent: 4909907 (1990-03-01), Berg

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