| 摘要 |
PURPOSE:To prepare the titled compound in high selectivity, by oxidizing isobutylene or t-butanol with O2 in the presence of a catalyst containing Mo, Pb, Fe, Ni, Bi, an element selected from Rb, Cs and Tl, and O, at specific ratios. CONSTITUTION:Methacrolein is prepared by oxidizing isobutylene or t-butanol with O2 in the presence of a catalyst of formula (X is least one element selected from Rb, Cs and Tl; when X is two or more elements, e is the total number of the elements; a is 0.05-5; b is 0.05-4; c is 0.05-2; b/c is 0.25-2.0; d is 0.1-5; e is 0.01-2; f is number of O atoms). EFFECT:Little formation of isobutyl aldehyde which is hardly separable from methacrolein. The highly toxic element such as As, Te, etc. is not necessary. The catalytic life is long. |
