| abstract |
The present invention provides a catalyst capable of producing methacrolein and methacrylic acid from isobutylene with high conversion and high selectivity. The catalyst for producing isobutylene and methyl methacrylate of the present invention has the general formula (1). Mo 12 Bi b Fe c A d B e O f ··· (1) [In the formula, Mo represents a molybdenum atom, Bi represents a bismuth atom, Fe represents an iron atom, A represents at least one atom selected from the group consisting of nickel and cobalt, and B represents potassium, rubidium, cesium and thallium. At least one atom selected from the group consisting of: ] The cumulative pore volume is 0.3 cm 3 / g or more, the volume of macropores having a pore radius of 1 μm or more is 0.04 to 0.15 cm 3 / g, and the specific surface area (X) The product (X × Y) of the filling bulk density (Y) is 3.3 to 5 m 2 / cm 3 . [Selection figure] None |