| abstract |
1473530 Dehydrogenating olefins STANDARD OIL CO 4 Sept 1974 [4 Sept 1973] 38646/74 Heading C5E [Also in Divisions B1 and C2] Olefins containing 4 to 10 carbon atoms are oxidatively dehydrogenated at 200-600 C. in the presence of molecular oxygen and a catalyst of empirical formula where: A is alkali metal, Tl, In, Ag, Cu, Sc, Y rare earth and mixtures thereof; D is P, As, Sb, Sn Ge, B, W, Th, V, Ti, Si or mixtures thereof; a and b are 0 to 4; c and d are 0 to 20 with c+d at least 0À1; e is 0À1 to 10; f is 0À01 to 6; and x is a number to satisfy valency requirements. The reaction can be at atmospheric pressure or above or below atmospheric in a fixed or fluidized bed reactor with contact time up to 20 secs. and a feed comprising 5 to 15 moles of air per mole olefin. Steam is suitably present. The examples describe the conversion of butene-1 to butadiene and reference is made to the oxidative dehydrogenation of butene-2 and isoamylene. |