Collect. Czech. Chem. Commun. 1979, 44, 85-98

Hydrogenolysis of nitrogen-containing compounds on a cobalt-molybdenum catalyst

Mirko Černý

Institute of Chemical Process Fundamentals, Czechoslovak Academy of Sciences, 165 02 Prague 6-Suchdol


A sulphidized cobalt-molybdenum catalyst on Al2O3 has been used to study hydrogenolysis of pyridine, piperidine, quinoline and their methyl derivatives. In reaction mixtures were identified the compounds which contribute to the knowledge of the mechanism of hydrogenolysis. The cleavage of 2-methylpiperidine ring takes place between the nitrogen atom and the methylene groups and not between the nitrogen atom and the carbon substituted with the methyl group. The amount of hydrogenolysis products decreases in the series pyridine, 2-methylpyridine, 2,6-dimethylpyridine and 2,4,6-trimethylpyridine, i.e. with the increasing number of the methyl groups bonded to the ring.