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 CO2 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%.
