摘要:
A process and catalyst for the partial oxidation of paraffinic hydrocarbons, such as ethane, propane, naphtha, and natural gas condensates, to olefins, such as ethylene and propylene. The process involves contacting a paraffinic hydrocarbon with oxygen in the presence of hydrogen and a catalyst under autothermal process conditions. Preheating the feed decreases oxygen consumption and increases the net hydrogen balance. The catalyst comprises a Group 8B metal, preferably, a platinum group metal, and at least one promoter selected from Groups 1B, 6B, 3A, 4A, and 5A, optionally supported on a catalytic support, such as magnesia or alumina. In preferred embodiments, the support is pretreated with a support modifier selected from Groups 1A, 2A, 3B, 4B, 5B, 6B, 1B, 3A, 4A, 5A, the rare earth lanthanides, and the actinides. A modified fluidized bed reactor is disclosed for the process.
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° C.