| 摘要 |
PURPOSE:To obtain the titled compound in high selectivity in high yield, by oxidizing acrolein or methacrolein with O2 at high temperature in a gaseous phase by the use of a catalyst having high selectivity, life, and utility prepared by adding K, Cu, Fe, etc. to a system consisting of P-Mo-V. CONSTITUTION:In preparing acrylic acid or methacrylic acid by oxidizing catalytically acrolein or methacrolein with O2 at high temperature in a gaseous phase, a catalyst (e.g., catalyst shown by the formula II, etc.) shown by the formula (X is one or more selected from K, Rb, Cs, and Tl; Y is one or more selected from Cu, Si and Sb; Z is one or more selected from Ni, Mn, and U; a=0.5-6; b=12, c=0.2-6; d=0.01-6; e=0.01-6; f=0.01-6) is used. EFFECT:Highly catalytic activity can be maintained for a long period. |
