METHYLATION OF TOLUENE TO PARA-XYLENE

摘要

PURPOSE: A selective manufacturing method for xylene by catalyst methylation of toluene in the presence of a zeolite bound zeolite catalyst. CONSTITUTION: A process is provided for the production of para-xylene by the methylation of toluene in the presence of a zeolite bound zeolite catalyst. The catalyst comprises first zeolite crystals which are bound together by second zeolite crystals. When used to methylate toluene to para-xylene, the zeolite bound zeolite catalyst has a para-xylene selectivity greater than thermodynamic equilibrium. This selectivity can be enhanced by selecting the catalyst.