| 摘要 |
PURPOSE:To obtain the title compound in an advantageous manner by vapor phase catalytic oxidation of methacrolein with molecular oxygen in the presence of a specific catalyst active for a long period of time which is prepared by introducing gallium into a catalyst containing elements like phosphorus and molybdenum. CONSTITUTION:The objective compound can be obtained by vapor phase catalytic oxidation of methacrolein with molecular oxygen in the presence of a catalyst of the formula (P, Mo, Cu, V, Ga and O are phosphorus, molybdenum, copper, vanadium, gallium and oxygen, respectively; X is arsenic, antimony, zirconium, boron, germanium, tellurium, bismuth, silver, tantalum, iron, chromium, etc.; Y is potassium, rubidium, cesium, etc.; a-h are atom rates for the respective elements, when b=12, a=0.5-3, c=0.01-2, d=0.01-3, e=0.01-1, f=0-3, g=0.01-2, h is the number of the oxygen atoms necessary for satisfying the valences of the above respective components). |
