Shape-Selective Catalysis with Microporous Amorphous Mixed Oxides (pages 180–182)
Prof. Dr. Wilhelm F. Maier, Prof. Dr. Johan A. Martens, Dipl.-Chem. Stephan Klein, Dr. Jens Heilmann, Dr. Rudy Parton, Dr. Karen Vercruysse and Prof. Dr. Pierre A. Jacobs
Version of Record online: 22 DEC 2003 | DOI: 10.1002/anie.199601801
Ti- and V-containing amorphous glasses with inner surfaces of several hundred m2g−1 and pore diameters of 0.7 nm can be prepared by a sol-gel process. Like zeolites, these amorphous microporous mixed oxides AMM-MxSi 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.