| 摘要 |
A particulate porous ammoxidation catalyst for use in producing acrylonitrile or methacrylonitrile by reacting propylene, isobutene, or tertiary butanol with molecular oxygen and ammonia in a fluidized-bed reactor, characterized in that the catalyst comprises a metal oxide and a silica support on which the metal oxide is supported, that the metal oxide contains at least two elements selected from the group consisting of molybdenum, bismuth, iron, vanadium, antimony, tellurium, and niobium, and that the catalyst has a particle size distribution in which catalyst particles having a particle diameter of 5 to 200 mum account for 90 to 100 wt.% of the catalyst and has a pore size distribution in which the integrated volume of pores having a pore diameter of 80 Å or smaller is up to 20% of the total pore volume of the catalyst and the integrated volume of pores having a pore diameter of 1,000 Å or larger is up to 20% of the total pore volume of the catalyst. Also provided is a process for efficiently producing the catalyst. |
