Recovery of the formic acid/water azeotrope by distillation

Details Recovery of the formic acid/water azeotrope by distillation Recovery of the formic acid/water azeotrope by distillation

1975-02-06

1976-09-28

Lutter, Frank W.

Distillation: processes, separatory

Distilling to separate or remove only water

From organic compound

260499, 260542, 203 99, C07C 5144

Patent

active

039830101

ABSTRACT:
Formic acid is isolated from mixtures containing formic acid, methyl formate, methanol and water by fractional distillation, the mixture being fed into the upper half of the distillation column and 5 to 15 theoretical plates being maintained above the feed point and 10 to 25 theoretical plates below the feed point. The formic acid is withdrawn at the bottom end of the column as an azeotrope with water, the azeotrope being in the liquid state or preferably in the vapor state.

REFERENCES:
patent: 1826302 (1931-10-01), Clarke et al.
patent: 1896100 (1933-02-01), Ricard et al.
patent: 3404175 (1968-10-01), Mercier
patent: 3681204 (1972-08-01), Mercier
patent: 3692636 (1972-09-01), Huguet
patent: 3718545 (1973-02-01), Horlenko
patent: 3769177 (1973-10-01), Eubanks et al.
patent: 3791935 (1974-02-01), Eubanks et al.

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