A process for preparing a coked zeolite catalyst and a process for the selective disproportionation of toluene using said catalyst.

摘要

A zeolite such as ZSM-5 is coked by contacting it with a thermally decomposable organic compound at a temperature less than 1200 DEG F at controlled liquid hourly space velocity of between 0.5 and 3.5 to deposit between 2 and 60 percent of coke therein. The coked zeolite is effective in disproportionating toluene to para-xylene.