Patent ID: 6043186
Filing Date: 2000-03-28
Classification: B01J,C07C,Y02P

Abstract:
An ammoxidation catalyst for use in producing acrylonitrile or methacrylonitrile from propane or isobutane by ammoxidation in the gaseous phase, comprising a compound oxide represented by the following formula (1):Mo.sub.1.0 V.sub.a Nb.sub.b X.sub.c Z.sub.d E.sub.e O.sub.n( 1)wherein:X is at least one element selected from the group consisting of tellurium and antimony;Z is at least one element selected from the group consisting of ytterbium, dysprosium and erbium;E is at least one element selected from the group consisting of neodymium, samarium, lanthanum, praseodymium, europium, gadolinium, terbium, holmium, thulium, lutetium and scandium; anda, b, c, d, e and n are, respectively, the atomic ratios of vanadium, niobium, X, Z, E and oxygen, relative to molybdenum,wherein:0.1.ltoreq.a.ltoreq.1.0;0.1.ltoreq.b.ltoreq.1.0;0. 1.ltoreq.c.ltoreq.1.0;0.001.ltoreq.d.ltoreq.0.1;0.ltoreq.e.ltoreq.0.1;0.001.ltoreq.d+e.ltoreq.0.1; andn is a number determined by and consistent with the valence requirements of the other elements present in the compound oxide of formula (1).