IMPROVED SELECTIVE AMMOXIDATION CATALYSTS Russian patent published in 2018 - IPC B01J23/887 C07C253/26 B01J35/00 B01J37/03 C07C255/08 

FIELD: chemical or physical processes.

SUBSTANCE: present invention relates to a catalyst composition for use in the ammoxidation of an unsaturated hydrocarbon to a corresponding unsaturated nitrile containing a complex of metal oxides, the relative ratios of the listed elements in said catalyst being represented by the following formula: Mo_m Bi_a Fe_b A_c D_d E_e F_f G_g Ce_h Ni_i Co_j Mn_k Mg_l 0_#, wherein A is at least one element selected from the group consisting of sodium, potassium, rubidium and cesium; and D is at least one element selected from the group consisting of zinc, calcium, strontium, cadmium and barium; E is at least one element selected from the group consisting of chromium, tungsten, boron, aluminium, gallium, indium, phosphorus, arsenic, antimony, vanadium and tellurium; F is at least one element selected from the group consisting of lanthanum, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, yttrium, titanium, zirconium, hafnium, niobium, tantalum, aluminium, gallium, indium, thallium, silicon, germanium and less than about 10 ppm lead; G is at least one element selected from the group consisting of silver, gold, ruthenium, rhodium, palladium, osmium, iridium, platinum and mercury; and where a is 0.05 to 7, b is 0.1 to 7, c is 0.01 to 5, d is 0 or 0.1 to 12, e is 0 to 5, f is 0 to 5, g is 0 to 0.2, h is 0.01 to 5, i is 0.1 to 12, j is 0 or 0.1 to 12, k is 0 or 0.1 to 12, l is 0 or 0.1 to 12, m is 10 to 15, # is the number of oxygen atoms required to satisfy the valence requirements of the other constituent elements present; where z = d + i + j + k + 1; and wherein 0.45≤a / h <1.5, and 0.3≤(a + h) / z, and 0.8≤h / b≤5; with 0.2 <i / (i + j + k + l). Versions of the above catalyst composition are also provided.

EFFECT: technical result is improving the performance of the catalyst while achieving high degree of conversion of propylene and/or isobutylene to nitriles.

18 cl, 2 dwg, 4 tbl, 23 ex