| abstract |
(57) Abstract: Provided is a promoted catalyst having significantly improved activity over a base catalyst and a greatly improved overall yield of reaction products. A empirical formula: A a M b N c X d Zn e Ga f O g ( wherein, A is selected from Mo and W, M is selected from V and Ce, N is Te, Sb and X is selected from Nb, Ta, Ti, etc .; At the time of 1, b = 0.01-1.0, c = 0.01-1. 0, d = 0.01 to 1.0, e = 0 or 0.001 0.1, f = 0 or 0.001 to 0.1, g A catalyst comprising a promoted mixed metal oxide having the dependence on the oxidation state of the other elements, except that e and f are not simultaneously 0. |