PROCESS FOR PREPARING ANTIMONATE-BASED MIXED METAL OXIDE CATALYST IN CATALYTICALLY ACTIVE OXIDIZED STATE FOR OXIDATION AND AMMOXIDATION OF OLEFINS, CATALYST PREPARED THEREBY AND AMMOXIDATION METHOD AND OXIDATION METHOD FOR PREPARING NITRILE

摘要

PURPOSE: To provide a catalyst useful for the production of acrylonitrile from propylene, ammonia, and an oxygen-containing gas by using a method for preparing an antimonate-based mixed metal oxide catalyst. CONSTITUTION: The process for preparing an antimonate-based mixed metal oxide catalyst in a catalytically active oxidized state comprises steps of (a) contacting an aqueous Sb2O3 slurry with HNO3 and at least one Me compound, and, optionally, at least one compound selected from X, Q, or R compounds to form a first mixture; (b) heating and drying the first mixture to form a solid product; and (c) calcining the solid product, where the catalyst is represented by the following empirical formula: MeaSbbXcQdReOf, wherein Me is at least one element selected from the group consisting of Fe, Co, Ni, Sn, U, Cr, Cu, Mn, Ti, Th, Ce, Pr, Sm, and Nd; X is at least one element selected from the group consisting of V, Mo, and W; Q is at least one element selected from the group consisting of Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba, Sc, Y, La, Zr, Hf, Nb, Ta, Re, Ru, Os, Rh, Ir, Pd, Pt, Ag, Au, Zn, Cd, Hg, Al, Ga, In, Tl, Ge, Pb, As, and Se; R is at least one element selected from the group consisting of Bi, B, P, and Te; and a, b, c, d, e, and f respectively denote atomic ratios and are as follows: a is 0.1 to 15, b is 1 to 100, c is 0 to 20, d is 0 to 20, e is 0 to 10, and f is a number taken to satisfy the valence requirements of the metals present in the catalyst in the oxidation state.