PROCESS FOR PRODUCING &agr ,β-UNSATURATED CARBOXYLIC ACID

WIPO Patent Application WO/2006/085540

A1

A method of enhancing the yield of &agr ,β-unsaturated carboxylic acid obtained by liquid-phase oxidation of an olefin or &agr ,β-unsaturated aldehyde. In particular, there is provided a process for producing an &agr ,β-unsaturated carboxylic acid, characterized by including the step of carrying out an oxidation of olefin or &agr ,β-unsaturated aldehyde in a liquid phase to thereby obtain a reaction mixture containing an &agr ,β-unsaturated carboxylic acid and &agr ,β-unsaturated carboxylic anhydride and the step of bringing the &agr ,β-unsaturated carboxylic anhydride into contact with an alcohol or water to thereby obtain an &agr ,β-unsaturated carboxylic acid resulting from decomposition of the &agr ,β-unsaturated carboxylic anhydride.

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KOIZUMI ATSUSHI (JP)
MATAKE KAZUNORI (JP)
FUKUDA TOSHIHIKO (JP)
FUJIMORI YUJI (JP)

PCT/JP2006/302117

August 17, 2006

February 08, 2006

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MITSUBISHI RAYON CO (JP)
KOIZUMI ATSUSHI (JP)
MATAKE KAZUNORI (JP)
FUKUDA TOSHIHIKO (JP)
FUJIMORI YUJI (JP)

C07C51/487; C07C51/087; C07C51/235; C07C51/25; C07C57/045; C07B61/00

JPH0193559A	1989-04-12
JPS63198648A	1988-08-17
JP2003192632A	2003-07-09

Miyazaki, Teruo (16th Kowa Bldg. 9-20, Akasaka 1-chome Minato-k, Tokyo 52, JP)

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