Process for preparing unsaturated carboxylic acid or ester there

Details Process for preparing unsaturated carboxylic acid or ester there Process for preparing unsaturated carboxylic acid or ester there

1989-12-04

1993-10-05

Prescott, Arthur C.

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

Organic compounds

Carboxylic acids and salts thereof

560212, C07C 5700, C07C 5100, C07C 6700, C07C 6900

Patent

active

052507297

ABSTRACT:
A process for preparing an .alpha., .beta.-unsaturated carboxylic acid and/or an .alpha., .beta.-unsaturated carboxylic acid ester from at least one ester selected from .alpha.-hydroxycarboxylic acid ester, .alpha.-alkoxycarboxylic acid ester and .beta.-alkoxycarboxylic acid ester as a starting material by a vapor-phase catalytic reaction in the presence of a crystalline aluminosilicate as a catalyst.
According to the process, .alpha., .beta.-unstaturated carboxylic acid and/or an ester thereof can be produced in a mild condition and a high yield.

REFERENCES:
patent: 3657331 (1972-04-01), Ackermann et al.
patent: 3980670 (1976-09-01), Kummer et al.

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