| 摘要 |
PURPOSE: An In-improved 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. CONSTITUTION: A catalyst is produced by the process comprising (1) admixing compounds of the elements Mo, V, N, X and Z and at least one solvent to form an admixture, wherein N is at least one element selected from the group consisting of Te, Sb, Sn, Ge and Bi, 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, B, As, Li, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Hf, Pb, P, Pm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu, La, Sc, Au, Ag, Pd, Ga, Pr, Re, Ir, Nd, Y, Sm, Tb, W, Ce, Cu and Zn, and Z is selected from the group consisting of In and Re; and wherein the elements Mo, V, N, X and Z are present in such amounts that the atomic ratio of Mo:V: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. |
