Purification of formic acid by extractive distillation

Details Purification of formic acid by extractive distillation Purification of formic acid by extractive distillation

1976-10-04

1978-02-28

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

Distilling to separate or remove only water

From organic compound

203 58, 203 84, 260542, B01D 340, C07C 5144

Patent

active

040765946

ABSTRACT:
Formic acid is purified by extractive distillation of its aqueous solutions using a basic extractant, followed by distillation of the bottom mixture first obtained, the extractant used being N-formylmorpholine.

REFERENCES:
patent: 1919850 (1933-07-01), Luscher
patent: 2034332 (1936-03-01), Dragendorff et al.
patent: 2313386 (1943-03-01), Levesque
patent: 2357412 (1944-09-01), Levesque
patent: 3434936 (1969-03-01), Luther
patent: 3673081 (1972-06-01), Preusser et al.
patent: 3878241 (1975-04-01), Muller
patent: 3983010 (1976-09-01), Rauch et al.

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