CORE/SHELL ZEOLITE MATERIALS WITH HOLLOW ZEOLITE PARTICLES, THEIR PREPARATION AND CATALYTIC USE IN SINGLE STEP ALKYLATION+DEHYDROGENATION

摘要

A composition that includes a core/shell structured zeolite having a core with a finite silica to alumina ratio (SAR) and a shell that includes a plurality of hollow zeolite particles having an infinite silica to alumina ratio (SAR). The plurality of hollow zeolite particles may be further impregnated with one or more of metal, metal alloys or metal oxides. Methods of preparing such core/shell structured zeolite is further described, which include the step of combining a dispersion containing a zeolite particle having a finite SAR with the plurality of hollow zeolite particles. The core/shell structured zeolite of the invention, is particularly suited to function as a catalyst, which can catalyze at least two different chemical reactions in a single reactor system such as alkylation of an organic substrate followed by dehydrogenation.