Patent ID: 6504072
Filing Date: 2003-01-07
Classification: B01J,C07C,Y02P

Abstract:
A process for the selective production of para-xylene which comprises reacting toluene with methanol under alkylation conditions in the presence of a catalyst comprising a porous crystalline material having a Diffusion Parameter for 2,2 dimethylbutane of about 0.1-15 secâˆ’1 when measured at a temperature of 120Â° C. and a 2,2 dimethylbutane pressure of 60 torr (8 kPa) wherein said porous crystalline material has undergone prior treatment with steam at a temperature of at least 950Â° C. to adjust the Diffusion Parameter of said material to about 0.1-15 secâˆ’1.