| 摘要 |
Alkanes containing up to 6 carbon atoms are isomerized in the presence of a Pt on Al2O3 catalyst which has been activated by the sublimate of hexachlorethane. Comparative examples describe the isomerization of n-hexane using conventionally activated and novel catalysts. Typical conditions are: L.H.S.V. 0.5; temperature 130-140 DEG C.; pressure 18-25 kg./cm.2; H2: hydrocarbon = 3: 1. Products of isomerization include C1-C3 hydrocarbons, iso-C4, n-C4, iso-C5, n-C5, cyclo-C5 2: 2-dimethylbutane, 2: 3-dimethylbutane, 2-methylpentane, and 3-methylpentane.ALSO:Pt or Al2O3 catalysts are activated by the sublimate from hexachlorethane. In comparative examples Pt or Al2O3 having a surface are in excess of 350 sq. m./gm. is activated with hexachlorethane vapour at 250 DEG C. until the halogen content of the catalyst is about 10%. Subsequently the catalyst may be activated under N2 at 190 DEG C. |
