STUDIES ON THE SYNTHESIS AND CHARACTERIZA TION OF TI-ZSM-11 AND THE SELECTIVE OXIDATION OF STYRENE

Ti-ZSM-11 zeolite was synthesized by three different hydrothermal crys talline methods. The structure and properties were investigated by XRD , SEM, IR, TG-DTA, XPS, DRS. The results show that Ti4+ occupies T sit e of the framework of the zeolite. The unit cell parameters and the in tensity of the similar to 970 cm(-1) band in IR spectra increase with increasing Ti content 1 as well as the activity of the selective oxida tion of styrene. At the active centres, the Ti(N) are isolated from ea ch other and form long sequences, not having other Ti(TV) as neighbour s. The oxidative abilities of TS-2 are similar to three different porp hyrins in their catalytic properties.