TY - JOUR
T1 - Comparison of titanosilicates with different topologies as liquid-phase oxidation catalysts
AU - Xu, Hao
AU - Yan, Jiaying
AU - Lu, Xinqing
AU - Yin, Jianyong
AU - Wu, Peng
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2020/5/1
Y1 - 2020/5/1
N2 - Titanosilicates, with isolate and tetrahedrally coordinated Ti4+ ions in zeolite framework, have shown their great potentials in the liquid-phase selective oxidation reactions. The usage of H2O2 as the oxidant helped to build up environment-friendly chemical processes by giving H2O as the sole co-product. Four titanosilicates of Ti-MCM-68, Ti-MOR, Ti-MWW and TS-1, with distinct crystalline topologies, were included in present study, whose catalytic performances were compared in the epoxidation of alkenes and the ammoximation of ketones. Ti-MCM-68, as a recently discovered titanosilicate, showed attractive advantages in the epoxidation reactions, while its catalytic performance in the ammoximation reactions was inferior to the other three titanosilicates. However, the cyclohexanone conversion and oxime selectivity could reach ∼99% over Ti-MCM-68 titanosilicate under optimized reaction conditions, indicating that it could also be taken as a promising catalyst for ammoximation reaction.
AB - Titanosilicates, with isolate and tetrahedrally coordinated Ti4+ ions in zeolite framework, have shown their great potentials in the liquid-phase selective oxidation reactions. The usage of H2O2 as the oxidant helped to build up environment-friendly chemical processes by giving H2O as the sole co-product. Four titanosilicates of Ti-MCM-68, Ti-MOR, Ti-MWW and TS-1, with distinct crystalline topologies, were included in present study, whose catalytic performances were compared in the epoxidation of alkenes and the ammoximation of ketones. Ti-MCM-68, as a recently discovered titanosilicate, showed attractive advantages in the epoxidation reactions, while its catalytic performance in the ammoximation reactions was inferior to the other three titanosilicates. However, the cyclohexanone conversion and oxime selectivity could reach ∼99% over Ti-MCM-68 titanosilicate under optimized reaction conditions, indicating that it could also be taken as a promising catalyst for ammoximation reaction.
KW - Epoxidation of alkenes
KW - Ketone ammoximation
KW - Liquid-phase oxidation
KW - Ti-MCM-68
KW - Titanosilicate
UR - https://www.scopus.com/pages/publications/85045433529
U2 - 10.1016/j.cattod.2018.04.026
DO - 10.1016/j.cattod.2018.04.026
M3 - 文章
AN - SCOPUS:85045433529
SN - 0920-5861
VL - 347
SP - 48
EP - 55
JO - Catalysis Today
JF - Catalysis Today
ER -