Abstract
AbstractThe major drawback of direct oxidation technology (onsite hydrogen peroxide production followed by its conversion into organic oxides without refining) is the design and preparation of the bifunctional catalysts used therein. Herein we present a bifunctional catalytic material (NHTS), which is synthesized by a revised semi‐in‐situ method that allows a noble metal to be distributed throughout the titanosilicate framework and also results in a redistribution of active Ti species throughout the crystals, thereby enriching the surface of the hollow crystals with catalytic species. This compound has been characterized by various techniques and its activity and selectivity for the direct epoxidation of propylene investigated. The results indicate that NHTS shows a very ordered MFI topology, with the noble metal incorporated in the framework, and a hollow structure, which makes it a good alternative for catalytic oxidations. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
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