The catalytic conversions of six-membered cyclanes over an aluminium-palladium catalyst

Abstract

1. 1. The conversions of cyclohexane, methylcyclohexane, and ethylcyclo- hexane over a PdAl 2O 3 catalyst at temperatures of 350–470° and pressures of hydrogen of 10–50 arm in a continuous flow system have been studied. 2. 2. It has been shown that the rate of dehydrogenation of the hydrocarbons investigated increases with an increase in their molecular weight. 3. 3. Simultaneously with their dehydrogenation, all the hydrocarbons investigated underwent isomerization into corresponding cyclopentane and cyclohexane hydrocarbons. The maximum yields of isomers were obtained at 430–450° and a pressure of hydrogen of 50 atm. 4. 4. It has been noted that at low temperatures methylcyclohexane isomerizes predominantly into ethylcyclopentane and at high temperatures into dimethylcyclopentanes. 5. 5. The chromatographic analysis of C 5C 8 hydrocarbons has been carried out with the evaluation of some isomeric dimethylcyclopentanes, trimethylcyclopentanes, dimethylcyclohexanes, and other compounds of normal and iso structure.