Process for pure grade acrylic acid

Distillation: processes – separatory – With chemical reaction – Including step of adding catalyst or reacting material

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203 71, 203DIG21, 562600, B01D 334

Patent

active

057468923

ABSTRACT:
A continuous process for producing a pure grade of acrylic acid having residual aldehyde levels under 10 parts per million. The process applies two groups of amines sequentially and continuously in selectively reducing acrolein and furfural and may be advantageously conducted in the presence of maleic acid and maleic anhydride impurities.

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patent: 5208370 (1993-05-01), Bauer, Jr. et al.
CA 81:121 364.
CA 80:965 66.
CA 80:703 36.
European Search Report dated Sep. 29, 1995.
Research Disclosure 167066 dated 78/02/20.

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