| 摘要 |
An acrolein is prepd. by contact-oxidizing propylene in the vapor phase with air or molecular oxygen-contg. gas in the presence of a catalyst having a compsn. of formula MoaWbBicFedAeBfCgDhOx. The catalyst is moulded in the shape of a hollow cylinder [D=3.0-10.00mm; d=D(0.1-0.7); L=D(0.5-2.0) . In the formula, A is Ni or Co; B is alkali (earth) metal or Tl; C is P, As, B or Nb; D is Si, Al or Ti; a,b,c,d,e,f,g,h and x are each atom ratio of Mo, W, Bi, Fe, A, B, C, D and O; a is 2-12; b is 0-10; a+b is 12; C is 0.1-10.0; d is 0.1- 10.0; e is 2-20; f is 0.005-3.0; g is 0-4; h is 0.5-15; x is a number determined by the atomic valences of the individual elements.
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