| 摘要 |
For the production of acrylonitrile by ammoxidation of propylene, there is provided a process capable of giving a high yield and maintaining such an effect for a long period of time. In producing acrylonitrile by ammoxidation of propylene, a fluidized bed catalyst is used and the reaction is carried out while appropriately adding a molybdenum-containing material, wherein the fluidized bed catalyst, in which iron antimonate exists as a crystal phase, contains molybdenum, bismuth, iron, potassium, an M component, an N component and silica as essential components, and has a number of Mo/Me of from 0.8 to 1, wherein the Mo/Me is a number obtained by dividing the product 20 of a valence number of molybdenum as molybdic acid and an atomic ratio of molybdenum by the sum of respective products of respective valence numbers and atomic ratios of respective metal molybdate-producible metal elements other than iron antimonate, that is, bismuth, iron, potassium, the M component element, the N component element and a T component element. |
