Process for producing α,β-unsaturated carboxylic...

Details Process for producing α,β-unsaturated carboxylic... Process for producing α,β-unsaturated carboxylic...

2006-02-08

2010-10-26

Zucker, Paul A (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

C562S545000

Reexamination Certificate

active

07820856

ABSTRACT:
Disclosed is a method for enhancing a yield of an α,β-unsaturated carboxylic acid obtained by liquid-phase oxidation reaction of an olefin or an α,β-unsaturated aldehyde. In particular, there is provided a method for producing an α,β-unsaturated carboxylic acid, wherein the method includes the step of carrying out oxidation reaction of an olefin or an α,β-unsaturated aldehyde in a liquid phase to obtain a reaction mixture containing an α,β-unsaturated carboxylic acid and an α,β-unsaturated carboxylic acid anhydride and the step of bringing the α,β-unsaturated carboxylic acid anhydride into contact with an alcohol or water to obtain an α,β-unsaturated carboxylic acid resulting from decomposition of the α,β-unsaturated carboxylic acid anhydride.

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U.S. Appl. No. 11/917,422, filed Dec. 13, 2007, Fukuda, et al.
U.S. Appl. No. 12/388,917, filed Feb. 19, 2009, Fujimori, et al.

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