YNU-2P, a highly crystalline composite of organic structuredirecting agent and pure-silica MSE precursor, was stabilized by steaming so as to retain adequate site defects. To the remaining site defects, the efficient introduction of Ti into the framework was accomplished to give the new microporous titanosilicate Ti-YNU-2 after optimizing the conditions for steaming and vapor phase TiCl 4 treatments. This material proved to be a high-performance catalyst, exhibiting remarkably enhanced performance compared to Ti-MCM-68, a material already known to show superior performance to TS-1, during phenol oxidation using H 2 O 2 as an oxidant.

Si-modified Ti-MCM-68 catalyst showed very high para-selectivity as well as high activity for phenol oxidation in the presence of EtOH as a cosolvent.