| abstract |
PROBLEM TO BE SOLVED: To provide a method for producing a catalyst for synthesizing unsaturated aldehydes and unsaturated carboxylic acids, wherein the catalyst activity can be easily controlled and a highly active and highly selective catalyst can be obtained. Provided, and a method for synthesizing unsaturated aldehydes and unsaturated carboxylic acids in high yield using the catalyst. SOLUTION: The method for producing a catalyst for synthesizing an unsaturated aldehyde and an unsaturated carboxylic acid of the present invention comprises a step of adding a liquid to particles containing molybdenum, bismuth and iron, kneading the mixture, extruding the kneaded product, A step of curing the molded article obtained by molding, and a step of drying and / or baking the cured molded article, wherein the contact time between the liquid containing particles containing molybdenum, bismuth and iron and the liquid is 1 to 48 hours. In addition, the curing time of the molded article is at least 50% of the contact time between the liquid containing particles containing molybdenum, bismuth and iron and the liquid. |