Patent ID: 8008227

Claim:
A mixed oxide catalyst of the formula (Mo 12 Bi a C b (Co+Ni) c D d E e F f G g H h )O x (I) in which C: iron, D: at least one of the elements selected from the group consisting of W and P, E: at least one of the elements selected from the groups consisting of Li, K, Na, Rb, Cs, Mg, Ca, Ba and Sr, F: at least one of the elements selected from Ce, Mn, Cr and V G: at least one of the elements selected from the groups consisting of Nb, Se, Te, Sm, Gd, La, Y, Pd, Pt, Ru, Ag and Au H: at least one of the elements selected from the groups consisting of Si, Al, Ti and Zr and a=0-5.0 b=0.5-5.0 c=2-15 d=0.01-5.0 e=0.001-2 f=0.001-5 g=0-1.5 h=0-800, and x=number which is determined by the valency and frequency of the elements other than oxygen, and g+h>0.