Abstract: Methylimidazole and 3-chloro-1 propanol were used as materials to synthesize ionic liquids(1-hydroxypropyl-3-methylimidazolium tetrafluoroborate, NpmimBF4), and its graft was immobilized to mesoporous materials(FDU-15), thus for synthesizing and preparing mesoporous catalyst(NpmimBF4-FDU). Techniques such as thermogravimetry, X-ray diffraction, infra-red spectrum and transmission electron microscope were employed to characterize the structure of catalyst. The catalytic activity of the catalyst was investigated in the hydrolysis reaction of propylene carbonate(PC). The result shows that the catalyst can effectively catalyze the hydrolysis of propylene carbonate to 1,2-propanediol glycol at normal pressure. When mass fraction of the catalyst is 4%, temperature is 80 ℃ and the reaction time is 2 h, the yield of 1,2-propanediol glycol is more than 99%. The catalyst can be repeatedly used for 5 times after simple separation but its activity changes greatly. A reaction mechanism is proposed.

Key words: ionic liquid, FDU-15, catalyst,propylene carbonate, hydrolysis