Process for preparation of alpha, beta-unsaturated acids

Details Process for preparation of alpha, beta-unsaturated acids Process for preparation of alpha, beta-unsaturated acids

1986-12-29

1990-07-24

Garner, Vivian

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

Organic compounds

Carboxylic acids and salts thereof

2604055, 562405, 562495, 562503, 562504, 562510, C07C 51353, C07C 5704, C07C 5726, C07C 5742

Patent

active

049436597

ABSTRACT:
Catalyst and process are disclosed for preparation of alpha, beta-unsaturated acids. Catalyst comprises a silica component and a Group IA alkali metal component which is present in an amount of from 200 to 15,000 parts per million, said silica component containing less than about 500 parts per million individually of aluminum, zirconium, titanium, iron and mixtures thereof. Process comprises reacting formaldehyde and a carboxylic acid of the formula RHC.sub.2 COOH wherein R is a member of the class consisting of --H, -alkyl, -aryl, -aralkyl, -cycloalkyl, and -alkylaryl radicals in the presence of said catalyst. Catalyst activity is maintained during process by addition of source of alkali metal component.

REFERENCES:
patent: 3840587 (1974-10-01), Pearson

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