Patent ID: 7071140

Claim:
A catalyst composition comprising a complex of catalytic oxides comprising rubidium, cerium, chromium magnesium, iron, bismuth, molybdenum, and at least one of nickel or nickel and cobalt, wherein the relative ratios of these elements are represented by the following general formula Rb a Ce b Cr c Mg d A e Fe f Bi g Mo 12 O x wherein A is Ni or the combination of Ni and Co, a is about 0.01 to about 1, b is about 0.01 to about 3, c is about 0.01 to about 2, d is about 0.01 to about 7, e is about 0.01 to about 10, f is about 0.01 to about 4, g is about 0.05 to about 4, x is a number determined by the valence requirements of the other elements present, wherein “b”+“c” is greater than g and wherein the catalyst is substantially free of manganese, a noble metal and vanadium.