Comparative Performance of Ion-exchanged ZSM-5 and Y -Zeolite Catalysts for Toluene Disproportionation Reaction

Abstract

810-816The toluene disproportionation reaction was carried out using ZSM-5 as well as Y- zeolite catalysts after ion exchange with active metals Ni, Pb,and Cr. The reaction was carried out under atmospheric pressure. The effect of type of cation used for ion exchange, silica- alumina ratio, type of zeolite, and particle size were also studied. The percent p-xylene yield (which is the most desirable product), was found to increase after ion-exchange with active cations. A maximum p -xylene yield of 2.3 percent was obtained with Cr HZSM-5 (SAR-19) at 600C and 1 atmos pressure