Shape‐Selective Catalysis with Microporous Amorphous Mixed Oxides

Abstract

Ti‐ and V‐containing amorphous glasses with inner surfaces of several hundred m 2 g −1 and pore diameters of 0.7 nm can be prepared by a sol‐gel process. Like zeolites, these amorphous microporous mixed oxides AMM‐M x Si show catalytic shape‐selectivites. The epoxidation of alkenes with tert ‐butylhydroperoxide on Ti‐containing glasses is catalyzed size‐selectively. In the hydrocracking test of decane, these materials show a product distribution that indicates the presence of Brønstedt centers in a shape‐selective environment, as well as tubular pores, the lack of additional cavities, and an effective pore size comparable to those of 10‐ and 12‐ring zeolites.