Method for producing alpha, beta-unsaturated calboxylic acid

Abstract

Disclosed is a method for producing an α, β-unsaturated carboxylic acid from an olefin or an α, β-unsaturated aldehyde, while suppressing dissolution of a silica carrier, which is a carrier for a silica-supported noble metal-containing catalyst, in a water-containing solvent. Specifically disclosed is a method for producing an α, β-unsaturated carboxylic acid through oxidation of an olefin or an α, β-unsaturated aldehyde in a water-containing solvent in the presence of a silica-supported noble metal-containing catalyst in a reactor, in which at least one of silicic acid and ions thereof is supplied into the reactor.

Dependencies are inferred from the claim text.