| abstract |
The present invention is based on the finding that, Which is a multi-element oxide of the catalyst component. The method comprises the steps of: obtaining from the elemental source a particulate oxide Bi 1 W b O x having a particle size (Formula I) and a stoichiometric Mo 12 Z 1 c Z 2 d Fe e Z 3 f Z 4 with a particle size (Formula II) g Z 5 h O y , mixing the mixture according to the ratio of a: 1, forming a compact using the mixture, and heat-treating the compact. Formula III is 820 or more. <Expression i> <Expression ii> <Expression iii> <Expression iv> |