| abstract |
A process for producing geometric shaped catalyst bodies K whose active material is a multielement oxide of stoichiometry n [Bi 1 W b O x ] a [Mo 12 Z 1 c Z 2 d Fe e Z 3 f Z 4 g Z 5 n O y ] 1 , n in which a finely divided oxide Bi 1 W b O x with the particle size d 50 A1 and, formed from element sources, a finely divided intimate mixture of stoichiometry Mo 12 Z 1 c Z 2 d Fe e Z 3 f Z 4 g Z 5 h with the particle size d 50 A2 are mixed in a ratio of a:1, this mixture is used to form shaped bodies and these are treated thermally, where (d 50 A1 ) 0.7 •(d 90 A1 ) 1.5 •(a) −1 ≧820. |