| abstract |
The method for producing the catalyst for synthesizing unsaturated aldehyde and unsaturated carboxylic acid of the present invention is a process of adding and kneading a liquid to particles containing molybdenum, bismuth and iron, and extruding the kneaded product, curing the molded product obtained by extrusion molding. Process, and drying and / or firing the cured molded article, the contact time between the particles containing molybdenum, bismuth and iron and the liquid is 1 to 48 hours, and the curing time of the molded article includes molybdenum, bismuth and iron It is characterized in that more than 50% of the contact time between the particles and the liquid. In the production method of the present invention, the catalyst activity can be easily controlled to obtain a high activity and high selectivity catalyst. |