Method for producing ammoxidation catalyst and method for producing acrylonitrtie

A method for producing an ammoxidation catalyst, the method comprising:

• a step (i) of preparing a starting material slurry comprising molybdenum, bismuth, iron, and a carboxylic acid compound;
• a step (ii) of stirring the starting material slurry in a temperature range of 35 to 45° C. for 1 hour to 8 hours, thereby preparing a precursor slurry;
• a step of spray-drying the precursor slurry, thereby obtaining a dried particle;
• and
• a step of calcining the dried particle;
• wherein the precursor slurry has a viscosity of 1 to 100 cp, and
• wherein the ammoxidation catalyst has a composition represented by the following formula (1):
• Mo12BiaFebXcYdZeOf (1)
• wherein X represents at least one element selected from the group consisting of nickel, cobalt, magnesium, calcium, zinc, strontium, and barium;
• Y represents at least one element selected from the group consisting of cerium, chromium, lanthanum, neodymium, yttrium, praseodymium, samarium, aluminum, gallium, and indium;
• Z represents at least one element selected from the group consisting of potassium, rubidium, and cesium;
• provided that a proportion of cobalt is 20 atomic % or more and/or a proportion of magnesium is 20 atomic % or less in the element X;
• a, b, c, d, and e satisfy 0.1≤a≤2.0, 0.1≤b≤3.0, 0.1≤c≤10.0, 0.1≤d≤3.0 and 0.01≤e≤2.0, respectively;
• and f represents a number of oxygen atoms needed to satisfy atomic valence requirements of other elements present therein.