| abstract |
A method for producing an oxide catalyst, which is a method for producing an oxide catalyst containing Mo, V, Sb, and Nb, comprising: a raw material preparation step including producing an aqueous mixed solution containing Mo, V, and Sb The sub-step (I) of (A) is a sub-step (II) of obtaining an aqueous mixed solution (A') by adding hydrogen peroxide to the aqueous mixed solution (A) to accelerate the oxidation of the aqueous mixed solution (A), and sub-step (III) of mixing the aforementioned aqueous mixed liquid (A') and Nb raw material liquid (B) to obtain an aqueous mixed liquid (C); a drying step, drying the aforementioned aqueous mixed liquid (C) to obtain dry powder and calcining step, the dry powder is calcined in an inert gas atmosphere, and the time from adding the hydrogen peroxide to the aqueous mixed solution (A) until mixing with the Nb raw material solution (B) is less than 5 minutes, The oxidation-reduction potential of the aforementioned aqueous mixed solution (A') before the aforementioned sub-step (III) is 150 to 350 mV. |