Stripping of unreacted glycol ethers and acids from an esterific

Details Stripping of unreacted glycol ethers and acids from an esterific Stripping of unreacted glycol ethers and acids from an esterific

1984-05-31

1985-10-01

Bascomb, Wilbur

Distillation: processes, separatory

With disparate physical separation

Utilizing liquid-liquid extracting of distillation product

203 69, 203 62, 203 68, 203 70, 560230, 560240, 560248, 560263, 562608, 568678, C07C 6724, C07C 6748, B01D 336

Patent

active

045444536

ABSTRACT:
An improved method of stripping unreacted alkylene glycol monoalkyl ethers and unreacted monocarboxylic or halogenated monocarboxylic acids from a mixture containing the monocarboxylic acid ester prepared therefrom by acid catalyzed esterification without any significant loss of the product ester. The method involves the injection of water into the distillate during the stripping and is particularly suitable for the recovery of propylene glycol monomethyl ether and acetic acid from esterification reaction mixtures containing a predominate amount of product propylene glycol monomethyl ether acetate. The process allows for removal and recovery or recycle of the ether and acid and the preparation of a higher purity product ester.

REFERENCES:
patent: 2423545 (1947-07-01), Aeschbach
patent: 3374153 (1968-03-01), Naglieri
patent: 3476798 (1969-11-01), Kunstle et al.
patent: 3923874 (1975-12-01), Hohenschutz et al.

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