Process for the production of unsaturated acids

Details Process for the production of unsaturated acids Process for the production of unsaturated acids

1978-10-30

1981-04-07

Garner, Vivian

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

Organic compounds

Carboxylic acids and salts thereof

252435, 252437, 562535, 568399, 568475, C07C 51215, C07C 5705

Patent

active

042608228

ABSTRACT:
A process for the direct oxidation of isobutane or propane to methacrylic acid or acrylic acid respectively is disclosed. The process encompasses contacting a feed gas containing isobutane or propane and oxygen with a specific catalyst which is composed of molybdenum, antimony and phosphorus combined with oxygen. The atomic ratio of molybdenum to antimony to phosphorous is from about 9 to about 24; about 0.25 to about 2; and about 0.75 to about 2 respectively. The catalytic oxidation to methacrylic or acrylic acid is accomplished at a temperature of from about 200.degree. C. to about 450.degree. C. The methacrylic or acrylic acid is removed from the feed gases exiting from the reaction zone and the remainder of the exited feed stream may be recycled to again contact the catalyst.

REFERENCES:
patent: 3293290 (1966-12-01), Flint et al.
patent: 4010188 (1977-03-01), Grasselli et al.
patent: 4066704 (1978-01-01), Harris et al.

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