SOME ASPECTS OF THE BIFUNCTIONAL ACTION OF NICKEL-ZEOLITE CATALYSTS IN THE CONVERSION OF TOLUENE

The bifunctional action of nickel-zeolite catalysts toward toluene conversion is studied. The additive behavior of both components of the catalysts is confirmed on the basis of the interpretation of their activity from three points of view: bifunctional catalysis, catalysis on the metal, and catalysis on the acidic component. New two-component catalysts of the type NiO CaNaY3.2-5.0 (nickel content from 2.5 to 7.5 wt%) are developed. After reduction they are active for the dealkylation of toluene and under certain conditions for the disproportionation of toluene. The catalysts may be used for production of benzene and xylenes from toluene. © 1979.