| 摘要 |
1,218,903. Oxidative dehydrogenation. MARATHON OIL CO. 18 April, 1969 [18 April, 1968], No. 20016/69. Heading C5E. Hydrocarbons are dehydrogenated by forming a vapour phase mixture thereof with O 2 or 0 2 -containing gas and a halogen or halogen compound; first passing said mixture at 300- 1300‹ F. and a GHSV of 5-1500 hr<SP>-1</SP> over a substantially inert material, and then passing it over a catalyst comprising a metal, metallic oxide, metallic salt or metallic hydroxide at 300-1300‹ F. The inert material and catalyst may form the higher and lower layers, respectively, in a vertical reactor through which the materials pass in downflow. Suitable reactants and other materials are as follows: hydrocarbons: ethylbenzene, cumene, diethylbenzenes, ethyltoluenes, butenes, methylbutenes n- and iso-pentenes, indane and alkylindanes; halogens and halogen compounds: Cl 2 , Br 2 , I 2 , HCl, HBr, HI, iodine mono-bromide, iodine mono-chloride, and bromine mono-chloride; inert materials: ceramic beads, glass beads, carborundum chips, granular rocks, clay and an alloy of Ni/Fe/Cr; catalysts : copper chromite (preferred), copper oxide, iron oxide, K 2 CO 3 , chromia/alumina, and copper chromite catalysts also containing elements of Groups IA, IIA or IIB or cerium, and optionally admixed with alumina. All the examples refer to the production of styrene from ethylbenzene. |
