| 摘要 |
PURPOSE: A catalyst for the oxidation of alkanes or a mixture of alkanes and alkenes to their corresponding unsaturated carboxylic acids by vapor phase catalytic oxidation in the presence of ammonia is provided, and a method of making the catalyst is also provided. CONSTITUTION: A catalyst is produced by the process comprising (1) admixing compounds of the elements A, M, N, X and Z and at least one solvent to form an admixture, wherein A is at least one element selected from the group consisting of Mo and W, M is at least one element selected from the group consisting of V and Ce, N is at least one element selected from the group consisting of Te, Sb and Se, 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, Bi, B, In, As, Ge, Sn, Li, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra, Hf, Pb, P, Pm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu, and Z is selected form the group consisting of Sc, Y, Pr, Nd and Tb and wherein the elements A, M, N, X and Z are present in such amounts that the atomic ratio of A:M:N:X:Z is 1 : 0.01 to 1.0 : 0.01 to 1.0 : 0.01 to 1.0 : 0.001 to 0.1; (2) removing above at least one solvent from the admixture to obtain a catalyst precursor; and (3) calcining above catalyst precursor. |
