Process for the preparation of unsaturated carboxylic acids

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

1989-01-12

1990-11-06

Garner, Vivian

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

Organic compounds

Carboxylic acids and salts thereof

502206, 502209, 562535, 260413, C07C 5125, C07C 57055

Patent

active

049688383

ABSTRACT:
The present invention provides a process for the preparation of a catalyst used in the production of unsaturated carboxylic acids such as methacrylic acid by the gas phase catalytic oxidation of the corresponding unsaturated aldehydes such as methacrolein. Said catalyst is composed of a multi-component composition containing at least phosphorus, molybdenum and antimony. The present invention has attained an improvement in its catalytic performance such as conversion rate, selectivity, single-pass yield, etc. by using antimony trioxide with average particle size of no more than 0.2 micron as a starting material upon preparing said catalyst.

REFERENCES:
patent: 4118419 (1978-10-01), Ishii
patent: 4454346 (1984-06-01), Khoobiar
patent: 4558029 (1985-12-01), Paparigos et al.

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