Process for the recovery of carboxylic acid from mixtures contai

Details Process for the recovery of carboxylic acid from mixtures contai Process for the recovery of carboxylic acid from mixtures contai

1980-10-01

1982-11-09

Sever, Frank

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

203 60, 203 61, 203 63, 203 67, 260415, 260419, 562607, 562608, 562609, B01D 336, B01D 340

Patent

active

043586090

ABSTRACT:
A process for the recovery of carboxylic acids from mixtures containing glycol esters derived from these acids. The process comprises reacting these mixtures at boiling with water to form carboxylic acid and entraining the carboxylic acid formed by means of the water by azeotropic distillation, so as to separate off a mixture of carboxylic acid and water. This mixture is subjected to extractive distillation by means of an organic solvent which is insoluble in water and in which water is insoluble. A mixture of water and organic solvent is thereby separated from a solution of carboxylic acid in the organic solvent.

REFERENCES:
patent: 3718545 (1973-02-01), Horlenko
patent: 3878241 (1975-04-01), Muller
patent: 3951755 (1976-04-01), Sartorius et al.
patent: 4091039 (1978-05-01), Scheibel

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