9:30 AM - 10:00 AM
[2A02] [Invited] Development of microporous titanosilicate catalyst for the oxidation of phenol with H2O2
Although TS-1 with an MFI framework is a useful catalyst for phenol oxidation, [Ti]-MCM-68, a novel MSE-type titanosilicate with 12-ring and 10-ring micropores, has been developed as a phenol oxidation catalyst with high activity and selectivity toward the para -isomer, hydroquinone. The thermal treatment after Ti insertion into the MSE framework significantly enhanced the catalytic activity of [Ti]-MCM-68, mainly due to an improvement in the hydrophobicity in the micropores. The addition of EtOH to the reaction mixture resulted in the best para-selectivity (>94%) due to enhancement of hydrophobicity by covering external Ti sites through Si–OH and EtOH interactions.
Keywords:12-ring micropores, shape-selectivity, hydrophobicity