Removal of trace aldehydes from carboxylic acids

Details Removal of trace aldehydes from carboxylic acids Removal of trace aldehydes from carboxylic acids

1982-01-26

1982-11-09

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

With chemical reaction

Including step of adding catalyst or reacting material

203 64, 203 91, 203DIG21, 562600, B01D 334, C07C 5144

Patent

active

043583474

ABSTRACT:
Carbonyl impurities in acrylic acid are removed by reacting them with a 1,2-glycol prior to distillation. The acetal-type products remain as heavies in the distillation bottoms.

REFERENCES:
patent: 3220932 (1965-11-01), Crandall
patent: 3709928 (1973-01-01), Murayama et al.
patent: 3725208 (1973-04-01), Maezawa et al.
patent: 3893895 (1975-07-01), Dehnert et al.

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