Patent ID: 6239325
Filing Date: 2001-05-29
Classification: B01J,C07C

Abstract:
A process for selectively producing olefins which comprises oxidizing and dehydrogenating C.sub.2 -C.sub.5 lower alkanes in the presence of molecular oxygen in vapor phase to produce corresponding olefins which comprises contacting said C.sub.2 -C.sub.5 lower alkanes and said molecular oxygen in vapor phase with a catalyst, wherein said catalyst consists essentially of a composition expressed by the formula (1) below:A.sub..alpha. Sb.sub..beta. W.sub..gamma. D.sub..delta. Ox (1)in which A is at least one metal selected from the group consisting of molybdenum and chromium; Sb is antimony; W is tungsten; O is oxygen; and D is at least one metal selected from the group consisting of V, Nb, Ta, Fe, Co, Ni, Cu, Ag, Zn, B, Tl, Sn, Pb, Te, Li, Na, K, Rb, Cs, Mg, Ca, Sr, Ba, La, Ce and Sm; .alpha., .beta., .gamma., .delta. and x denote atomic numbers of A, Sb, W, D and O, respectively, where when .alpha.=1, .beta.=1-5, .gamma.=0.2-5 and .gamma.=0-3; and x is a numerical value determined by the state of oxidation of those elements other than oxygen.