| abstract |
The present invention relates to a method for producing an oxide catalyst containing Mo, V, Sb, and Nb, comprising the steps of: preparing a raw material mixture for obtaining an aqueous mixed liquid containing Mo, V, Sb, and Nb; C., and a step of drying the aqueous mixture to obtain a dry powder, and a step of calcining the dry powder to obtain the oxide catalyst, the raw material Nb precipitation is promoted by performing at least one operation selected from the group consisting of (I) to (III) in the preparation step and / or the ripening step. According to the present invention, an oxide catalyst having a high unsaturated nitrile yield can be obtained, and furthermore, the oxide catalyst can be produced in a relatively short time without requiring the introduction of complicated processes and the change of equipment. can do. |