| 摘要 |
A mixture containing unconverted (dehydrogenatable) hydrocarbon(s), dehydrogenated (unsaturated) hydrocarbon(s), hydrogen and steam (such as is obtained as effluent mixture from the dehydrogenation of dehydrogenatable hydrocarbons with a dehydrogenation catalyst comprising a modified iron compound in the presence of steam in a multicatalyst bed system) is contacted with an oxidation catalyst whereby hydrogen is selectively oxidized in preference to the unconverted and dehydrogenated hydrocarbons. The selective oxidation catalyst which is used comprises a noble metal of Group VIII of the Periodic Table, a metal of Group IVA, a metal of Group IA or IIA composited on an alumina support which has been calcined (prior to impregnation with those metallic components) at a temperature in the range of from about 900 DEG to about 1500 DEG C in the absence or presence of steam to provide a catalyst which possesses increased stability and activity when compared to prior catalysts. The selective oxidation of hydrogen improves the combustion thereof and supplies the necessary heat which is required for a subsequent dehydrogenation treatment. |
