Patent ID: 8686194

Claim:
An Mo-, Bi- and Fe-comprising multimetal oxide composition of the general stoichiometry I, Mo 12 Bi a Co b Fe c K d Si e O x (I), where the variables have the following meanings: a=0.5 to 1, b=7 to 8.5, c=1.5 to 3.0, d=0 to 0.15, e=0 to 2.5 and x=a number which is determined by the valence and abundance of the elements other than oxygen in I and fulfil the following conditions: 12 âˆ’bâˆ’ 1.5 Â·c=A, and 0.5 â‰¦Aâ‰¦ 1.5;â€ƒâ€ƒcondition 1 0.2 â‰¦a/Aâ‰¦ 1.3; andâ€ƒâ€ƒcondition 2 2.5 â‰¦b/câ‰¦ 9.â€ƒâ€ƒcondition 3