METHOD FOR PRODUCING a,ß-UNSATURATED CARBOXYLIC ACID

摘要

Disclosed is a method for producing an a,ß-unsaturated carboxylic acid from an olefin or an an a,ß-unsaturated aldehyde, while suppressing dissolution of a silica carrier, as the carrier for a silica-supported noble metal-containing catalyst, into a water-containing solvent. Specifically disclosed is a method for producing an a,ß-unsaturated carboxylic acid wherein an olefin or an an a,ß-unsaturated aldehyde is oxidized in a water-containing solvent in a reaction vessel in the presence of a silica-supported noble metal-containing catalyst. In this method, silicic acid and/or ions thereof are supplied into the reaction vessel.