Distillation: processes – separatory – With chemical reaction – Including step of adding catalyst or reacting material
Patent
1995-10-27
1998-06-02
Manoharan, Virginia
Distillation: processes, separatory
With chemical reaction
Including step of adding catalyst or reacting material
203 71, 203DIG9, 203DIG21, 562600, B01D 334, C07C 5142
Patent
active
057593582
ABSTRACT:
Processes are provided for producing a pure grade of acrylic acid having residual aldehyde levels under 10 parts per million. The processes apply selected groups of amines sequentially and, preferably, continuously in selectively reducing, for example, acrolein and furfural, and may be advantageously conducted in the presence of maleic acid and maleic anhydride impurities.
REFERENCES:
patent: 3674651 (1972-07-01), Otsuki et al.
patent: 3725208 (1973-04-01), Maezawa et al.
patent: 3893895 (1975-07-01), Dehnert et al.
patent: 4828652 (1989-05-01), Schropp
patent: 5208370 (1993-05-01), Bauer, Jr. et al.
European Search Report dated Sep. 29, 1995.
Bauer, Jr. William
Hale Timothy Allen
Mason Robert Michael
Petrovich Lori Marie
Upmacis Rita Karina
Gironda Kevin F.
Lemanowicz John L.
Manoharan Virginia
Rohm and Haas Company
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