Process for the preparation of unsaturated carboxylic acids by t

Details Process for the preparation of unsaturated carboxylic acids by t Process for the preparation of unsaturated carboxylic acids by t

1975-11-07

1976-09-21

Garner, Vivian

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252443, 252456, 252469, C07C 5132

Patent

active

039819124

ABSTRACT:
A process is disclosed for the preparation of acrylic acid or methacrylic acid, comprising reacting in vapor phase acrolein or methacrolein with molecular oxygen or an oxygen-containing gas, at a temperature between 200.degree. and 350.degree.C, in the presence of a solid catalyst, and with a contact time between 0.5 and 5 seconds, wherein the catalyst consists of molybdenum, vanadium, tin, and one of the elements chromium, nickel, manganese, as well as oxygen chemically combined with the above-indicated elements, the atomic ratios of the elements being represented by the empirical formula:

REFERENCES:
patent: 3567772 (1971-03-01), Yanagita et al.
patent: 3840595 (1974-10-01), Grasselli et al.

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