Conversion of xylenes in the presence of high SiO2/Al2O3 zeolites 2. Catalytic activity of dealuminated mordenites

1.Mordenite catalysts dealuminated by 50% show the highest activity for the isomerization of o-xylene.2.At low degree of conversion, the ratio of the disproportionation and isomerization rates of o-xylene is independent of the aluminum content of the mordenite framework, and the closer one approaches equilibrium, the more the disproportionation contribution increases with increasing degree of dealumination.