PREPARATION OF CATALYST FOR SYNTHESIS OF UNSATURATED ALDEHYDE AND UNSATURATED CARBOXYLIC ACID

摘要

PROBLEM TO BE SOLVED: To provide a simple method for preparing a catalyst capable of efficiently synthesizing an unsaturated aldehyde and unsaturated carboxylic acid corresponding to each of propylene, isobutylene, tertiary butyl alcohol and tertiary butyl ether through the gas-phase catalytic oxidation of these raw materials. SOLUTION: First, a mixed solution of catalytic components containing at least, molybdenum, bismuth and iron, or water slurry is dried into a substantially dense cubic particle with an average grain diameter of 1-250μm using a spray drier. Then the cubic particle-baked powder obtained by baking the dried cubic particle is mixed with water and/or an alcohol and this mixture is molded by extrusion. Further, this molding is dried and thermally treated, or only thermally treated to obtain the catalyst.