| abstract |
[Problem] When a gas phase catalytic oxidation of propylene or isobutylene or the like, with respect to the temperature of a catalyst charged in a reaction tube, an abnormal reaction occurs when a raw material gas outlet side is considerably higher than a raw material gas inlet side. A method for producing acrolein, acrylic acid, methacrolein, and methacrylic acid that avoids, is safe and stable and has a high yield A manufacturing method for designing a catalyst and a catalyst filling specification so as to satisfy a specific condition of 0.5 ≦ Cmax−Ccrs. Cmax: raw material conversion rate that maximizes the yield of the target product, Ccrs: the maximum temperature of the catalyst layer Zin is Tin, the maximum temperature of the catalyst layer Zout is Tout, and when the raw material conversion rate is changed, Tin and Tout Raw material conversion rate when the magnitude relationship is reversed. [Selection figure] None |