Process for the preparation of unsaturated acids from unsaturate

Details Process for the preparation of unsaturated acids from unsaturate Process for the preparation of unsaturated acids from unsaturate

1977-01-31

1979-01-23

Garner, Vivian

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

Organic compounds

Carboxylic acids and salts thereof

252435, 252437, C07C 5132

Patent

active

041361105

ABSTRACT:
Methacrylic acid or acrylic acid is produced by the oxidation of methacrolein or acrolein respectively, with molecular oxygen in the vapor phase in the presence of a catalytic oxide of molybdenum and phosphorus, promoted with chromium or at least one element selected from the group consisting of thallium, rubidium, cesium, potassium, titanium, and arsenic, or a mixture thereof, wherein at least part of the molybdenum employed in the preparation of the catalyst is supplied in the form of molybdenum trioxide. The oxidation of methacrolein in the presence of a catalyst wherein all the molybdenum employed in the preparation of the catalyst has been supplied by molybdenum trioxide gives especially desirable high yields and selectivities to methacrylic acid.

REFERENCES:
patent: 3795703 (1974-03-01), Nuna et al.
patent: 3865873 (1975-02-01), Ada et al.
patent: 3928240 (1975-12-01), Milberger et al.

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