| abstract |
PROBLEM TO BE SOLVED: To provide a method for producing an excellent oxidation (particularly ammoxidation) catalyst while avoiding the use of a current commercially available tin oxide sol. The present invention relates to a method for preparing a catalyst having the elements and relative represented by the following empirical formula: VSb m A a D d O x source batch comprising final compounds of said elements to be included in the catalyst Preparing an aqueous slurry of the mixture of raw materials, followed by drying and heating and calcining the mixture to an active catalyst, drying the slurry, and calcining the mixture at least at 500 ° C. Calcining to a temperature, wherein the source batch of the tin is dispersed in a tetraalkylammonium hydroxide x A solution containing SnO 2 .xH 2 O with ≧ 0, wherein the tetraalkylammonium hydroxide has the following formula (C n H 2n + 1 ) 4 NOH (where 5 ≧ n ≧ 1 ). |