IMPROVED VAPOUR PHASE CATALYTIC ISOMERIZATION PROCESS OF MONOCYCLIC METHYL SUBSTITUTED AROMATIC HYDROCARBON FEEDSTOCK

摘要

A process for vapour-phase catalytic isomerization of monocyclic methyl-substituted aromatic hydrocarbon compounds of from 8 to 10 carbon atoms contained in a feedstock also containing ethylbenzene. The catalyst for the process comprises a zeolite having a constraint index of 1 to 12. The improvement in the process comprises treating the catalyst with one or more basic nitrogen compounds or precursors thereof.