PREPARATION OF CATALYST, PREPARATION OF OUTER SHELL CATALYST, ACRYLIC ACID, ACROLEIN, AND METHACROLEIN AND CATALYTIC GAS PHASE OXIDATION METHOD

摘要

PROBLEM TO BE SOLVED: To enable thickness control of catalyst outer shell comprising active oxide and to give a sufficient specific area, when forming a liquid adhesive from water and organic compound, by specifying a mixing ratio of both material and physical property of organic compound. SOLUTION: A carrier forming body is first moistened with a liquid adhesive. And after depositing by contacting an active oxide material of dried particles to the surface of the moistened carrier forming body, the liquid adhesive is removed from the moistened carrier forming body coated with the active oxide material. Consequently, a catalyst comprising the carrier forming body and the catalyst active oxide material provided on the surface of the carrier forming body is prepared. At this time as the liquid adhesive, a solution comprising 20-90 wt.% water and 10-80 wt.% organic compound 10 having boiling point or sublimation temperature of >100 deg.C, preferably >150 deg.C at atmosphere (1 atm) is used.