Patent ID: 7326818
Filing Date: 2008-02-05
Classification: B01J,C07C,Y02P,Y10S

Abstract:
1. A process for the disproportionation of toluene comprising contacting a reaction stream containing toluene, under conversion conditions, with a selectivated catalyst composition prepared by a process comprising the steps of: (a) contacting a catalyst comprising an acidic molecular sieve with a boron compound; (b) heating the boron-containing catalyst of step (a) at a temperature of about 650° C. to 705° C. to react said boron compound with the surface of the of the molecular sieve to form an amorphous coating on the surface of the acidic molecular sieve; and, (c) contacting the catalyst produced in step (b) with a medium containing hydrogen ions to remove unreacted boron compound from the acidic molecular sieve and to at least partially restore the acid activity of the acidic molecular sieve; said acidic molecular sieve having a Diffusion Parameter, D/r