Abstract：Mesoporous TS-1 zeolite microspheres were synthesized by hydrothermal crystallization with the assistance of triblock copolymer F127, and they were employed as the catalysts for the liquid-phase ammoximation of cyclohexanone with ammonia and hydrogen peroxide. The reaction parameters, molar ratio of H2O2 to cyclohexanone and NH3 tocyclohexanone, which governed the cyclohexanone conversion, oxime selectivity and catalyst deactivation, were investigated by simulating the operating conditions in an industrial process. Under optimized reaction conditions of temperature 75 ℃, molar ratio of H2O2 tocyclohexanone 1.1, molar ratio of NH3 to cyclohexanone 1.7, WHSV 6.3 h-1, mesoporous TS-1 microspheres exhibited cyclohexanone conversion above 98% and oxime selectivity above 99%. Moreover, the TS-1 microsphere catalyst showed a longer lifetime than conventional nanosized TS-1 particles.
Wang Zhendong,Xu Le,He Mingyuan et al. Synthesis of Mesoporous TS-1 Zeolite Microspheres and Catalytic Property in Cyclohexanone Ammoximation[J]. 化学反应工程与工艺, 2013, 29(5): 456-461.
