Process for preparing unsaturated carboxylic acids by the cataly

Details Process for preparing unsaturated carboxylic acids by the cataly Process for preparing unsaturated carboxylic acids by the cataly

1977-05-17

1979-03-27

Garner, Vivian

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

Organic compounds

Carboxylic acids and salts thereof

252470, C07C 5132, C07C 5704

Patent

active

041467329

ABSTRACT:
A process is disclosed for preparing unsaturated carboxylic acids consisting essentially in reacting in the vapor phase an unsaturated aldehyde with molecular oxygen or an oxygen-containing gas, at a temperature ranging from 200.degree. to 370.degree. C., in the presence of a solid catalyst, with a contact time between 0.5 and 5 seconds, characterized in that the catalyst consists essentially of molybdenum, vanadium, cobalt, and optionally tungsten, these elements being chemically combined with oxygen and the atomic ratios of the elements being represented by the empirical formula Mo.sub.12 V.sub.a W.sub.b Co.sub.c O.sub.d

REFERENCES:
patent: 3322693 (1967-05-01), Bethell et al.
patent: 3736354 (1973-05-01), Yanagita et al.
patent: 4014925 (1977-03-01), Feralazzo et al.

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