CATALYST FOR SYNTHESIZING UNSATURATED CARBOXYLIC ACID, METHOD FOR PRODUCING THE SAME, AND METHOD FOR SYNTHESIZING UNSATURATED CARBOXYLIC ACID USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a catalyst for synthesizing an unsaturated carboxylic acid which is excellent in catalytic activity and selectivity for the unsaturated carboxylic acid, a method for producing the catalyst, and a method for synthesizing the unsaturated carboxylic acid which is high in activity and selectivity and uses the catalyst. SOLUTION: The catalyst is used in the synthesis of the unsaturated carboxylic acid by the gas phase catalytic oxidation of an unsaturated aldehyde by molecular oxygen. The catalyst contains at least molybdenum and vanadium and is produced by a process in which particles containing molybdenum and vanadium are added with natural polysaccharide and a liquid, and the mixture, after being kneaded, is extrusion-molded.