Journal
CATALYSIS LETTERS
Volume 135, Issue 3-4, Pages 295-304Publisher
SPRINGER
DOI: 10.1007/s10562-010-0285-4
Keywords
SBA-15; Hydroxyl ionic liquids; Carbon dioxide; Epoxide; Cyclic carbonate
Categories
Funding
- National 863 Program of China [2009AA05Z319]
- National Natural Science Foundation of China [20873038, 20507005, E50725825]
- Hong Kong Baptist University [FRG/08-09/II-09]
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3-(2-hydroxyl-ethyl)-1-propylimidazolium bromide (HEPIMBr) was immobilized onto SBA-15, Al-SBA-15 mesoporous molecular sieves and SiO2 by chemical grafting method. The materials were characterized and used as catalysts for solvent-free synthesis of cyclic carbonates from CO2 and epoxides under relatively mild conditions. Among them, the HEPIMBr immobilized on SBA-15 performs the best, showing carbonate selectivity and yield of ca. 100% (120 degrees C, 2.0 MPa, 2 h). The catalyst is thermally stable and shows good reusability. Based on the experimental results, a plausible reaction mechanism has been proposed for the catalytic reaction.
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