Patent ID: 7365041

Claim:
A method for preparing an ammoxidation catalyst comprising a molybdenum (component (1)), bismuth (component (2)), at least one element selected from the group consisting of nickel, cobalt, zinc, magnesium, manganese and copper (component (3)) and at least one element selected from the group consisting of lanthanum, cerium, praseodymium and neodymium (component (4)), whereby an organic compound can be subjected to ammoxidation over a composite oxide fluid bed catalyst comprising said catalyst, the method comprising: preparing a first solution which contains at least a portion of starting materials of component (1), at least a portion of starting materials of component (2), and at least a portion of starting materials of component (3), but no starting materials of component (4); preparing a second solution by adding at least starting materials of component (4) to the first solution; and adjusting the pH of the second solution to a value within a range of 1.5 to 5.5.