| abstract |
(I) preparing a raw slurry containing molybdenum, bismuth, iron and a carboxylic acid compound, and (ii) stirring the raw slurry at a temperature in the range of 30 to 50 ° C for 20 minutes to 8 hours (Ii) a step of preparing a precursor slurry, a step of spray drying the precursor slurry to obtain dry particles, and a method of producing a catalyst for ammoxidation having a step of firing the dry particles. |