CATALYST FOR OXIDATIVE DEHYDROGENATION OF PARAFFINIC HYDROCARBONS AND USE OF THIS CATALYST

摘要

The invention proposes a method of oxidative dehydrogenation and cracking of C2-C5 paraffins (homogeneous hydrocarbons or mixtures with liquefied petroleum gas) to form C2-C5 olefins in the presence of an oxygen-containing gas and water vapor using a novel calcined oxidic catalyst that has the following composition: XaYbZcAdOx, wherein X is an element of groups II and/or IVb (Mg, Ca, Ti, Zr...), Y is a lanthanide and/or element of groups IVa or Va (Ce, La, Nd, Dy, Sn, Pr, Sb, Pb...), Z is an element of group I (Li, La, K...), A is an element of group VII (Cl, Br, J), and a is 0.4-0.9, b is 0.005-0.3, c is 0.05-1.5, d is 0.05-0.8 and x is a number determined by the valence requirements of the metals and halogens. The catalyst is used in the form of pressed spherical pellets or extrudates with added binder or deposited on a carrier material that consists of one of the above-mentioned oxidic components or of a separate carrier material. The weight-related space velocity relative to the hydrocarbons used is within the range of 0.1 to 20 h<-1> and the temperature is 400 to 700 DEG C.