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

1986-12-03

1987-09-08

Bascomb, Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 15, 203 57, 203 60, 203 61, 203 62, 562609, B01D 340, C07C 5302

Patent

active

046922199

ABSTRACT:
Formic acid cannot be easily removed from acetic acid by distillation because of the closeness of their vapor pressures. Formic acid can be readily removed from acetic acid by extraction distillation. Typical extractive distillation agents are carboxylic acids in the range of hexamoic acid to neodecanoic acid with or without solvents such as methyl benzoate, acetophenone and nitrobenzene.

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

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