| abstract |
PROBLEM TO BE SOLVED: To produce a target product in a high yield by gas phase catalytic oxidation of a reaction raw material with molecular oxygen, a high mechanical strength catalyst, a method for producing the catalyst, and an unsaturated aldehyde and unsaturated carboxylic acid A manufacturing method is provided. A catalyst for synthesizing unsaturated aldehydes and unsaturated carboxylic acids by vapor phase catalytic oxidation of propylene, isobutylene, tertiary butyl alcohol or methyl tertiary butyl ether with molecular oxygen, comprising molybdenum and A catalyst comprising a catalyst component containing bismuth, and a scaly inorganic substance having an average particle diameter of 10 μm to 2 mm and an average thickness of 0.005 to 0.3 times the average particle diameter. [Selection figure] None |