| 摘要 |
PROBLEM TO BE SOLVED: To provide an ammoxidation catalyst that exhibits a high acrylonitrile selectivity, and is hard to suffer from reduction in activity and selectivity even in a reaction over a long period of time.SOLUTION: According to one embodiment, there is provided the ammoxidation catalyst used in an ammoxidation reaction of propylene, and containing molybdenum, bismuth, iron, nickel and/or cobalt. According to another embodiment, there is provided the ammoxidation catalyst that is identical to the above ammoxidation catalyst except that the ammoxidation catalyst is represented by formula (1). Mo(BiCe)FeXYZO(1) [X is Ni or Co; Y is Mg, Ca, Zn, Sr or Ba; Z is K, Rb or Cs; a is a relative atomic ratio of cerium with respect to the total of Bi and Ce 0.2≤a≤1.5; b is the total atomic ratio of Bi and Ce with respect to Mo 12 atoms, 0.5≤b≤1.5; c is a relative atomic ratio of Fe with respect to Mo 12 atoms, 0.1≤c≤3; d is an atomic ratio of X with respect to Mo 12 atoms, 0.1≤d≤9.5; e is an atomic ratio of Y with respect to Mo 12 atoms, 0≤e≤9.5; f is an atomic ratio of Z with respect to Mo 12 atoms, 0.01≤f≤2; g is an atomic ratio of O with respect to Mo 12 atoms and is the number of oxygen atoms satisfying the valencies of the other existing elements].SELECTED DRAWING: None |
