关键词: MCM-41, 离子液体, 环氧丙烷, 固载, CO₂

Abstract:

A new hydroxyl-functionalized ionic liquid (HIILsBr) supported on MCM-41 was prepared by grafting HIILsBr onto porous MCM-41 with 3-chloropyltriethoxysilane.It was found that the immobilization condition had an obvious effect on the activity of catalyst.The immobilization time, immobilization temperature , ratio of ILs to carrier and solvent had an important effect on the performance of HIILs/MCM-41.In order to obtain optimum immobilization stability, the immobilization condition must be kept at a proper temperature, time, ratio of ILs to carrier range and with a proper solvent.Its performance for the synthesis of propylene carbonate(PC)from CO2 and propylene oxide was also investigated.Under the reaction condition(115℃, 2.0 MPa, 4 h), the yield of PC was 89.9% and the selectivity of PC was 99.5%.

Key words: MCM-41, 离子液体, 环氧丙烷, 固载, CO₂