Method for producing acrylonitrile, catalyst for use therein and method for preparing the same

A process for producing acrylonitrile, comprising:

• carrying out the ammoxidation of propylene in the presence of a fluidized bed catalyst having a composition represented by the following empirical formula:
• Mo10 Bia Feb Sbc Nid Cre Ff Gg Hh Kk Mm Xx Yy Oi (SiO2)j
• wherein Mo, Bi, Fe, Sb, Ni, Cr and K are molybdenum, bismuth, iron, antimony, nickel, chromium and potassium, respectively;
• F is at least one element selected from the group consisting of yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, aluminum and gallium and comprises at least lanthanum and/or cerium;
• G is at least one element selected from the group consisting of magnesium, calcium, strontium, barium, manganese, cobalt, copper, zinc and cadmium;
• H is at least one element selected from the group consisting of titanium, zirconium, vanadium, niobium, tantalum, tungsten, germanium, tin and lead;
• M is at least one element selected from the group consisting of ruthenium, rhodium, palladium, rhenium, osmium, iridium, platinum and silver;
• X is at least one element selected from the group consisting of phosphorus, boron and tellurium;
• Y is at least one element selected from the group consisting of lithium, sodium, rubidium, cesium and thallium;
• O is oxygen;
• Si is silicon;
• subscripts a, b, c, d, e, f, g, h, k, x, y, i and j are independently of one another an atomic ratio, provided that a=0.2 to 1.5, b=0.7 to 15, c=0 to 20, d=3 to 8, e=0.1 to 2.5, f=0.1 to 1.5, g=0 to 5, h=0 to 3, k=0.05 to 1.5, m=0 to 1, x=0 to 3, y=0 to 1;
• i is a number of oxygen in a metal oxide formed by bonding of said respective components;
• and j=20 to 200;
• and Mo/Me is from 0.8 to 1, wherein the Mo/Me is a number obtained by dividing the product, which is 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 bismuth, iron, nickel, chromium, potassium, the F component element, the G component element and the Y component element, and adding a molybdenum-containing material during said ammoxidation.