| 摘要 |
PURPOSE: Provided are an improved catalyst for the oxidation of alkanes or a mixture of alkanes and alkenes to their corresponding unsaturated carboxylic acids by vapor phase catalytic partial oxidation; a method of making the catalyst; and a process for the vapor phase catalytic partial oxidation of alkanes or a mixture of alkanes and alkenes to their corresponding unsaturated carboxylic acids. CONSTITUTION: A process for improving the performance characteristics of a catalyst, comprises: (a) providing a catalyst comprising a mixed metal oxide having a base composition empirical formula AaDbEcXdOe, wherein A is at least one element selected from the group consisting of Mo and W, D is at least one element selected from the group consisting of V and Ce, E is at least one element selected from the group consisting of Te, Sb and Se, and X is at least one element selected from the group consisting of Nb, Ta, Ti, Al, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ni, Pt, Sb, Bi, B, In, As, Ge, Sn, Li, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra, Hf, Ag, Pb, P, Pm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu; and, when a=1, b=0.01 to 1.0, c=0.01 to 1.0, d=0.01 to 1.0, and e is dependent on the oxidation state of the other elements; and (b) vapor depositing onto the catalyst at least one dopant metal for improving catalytic performance. |
