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Received October 31, 2009
Accepted November 19, 2009
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Synthesis of dimethyl carbonate from transesterification of ethylene carbonate with methanol using immobilized ionic liquid on commercial silica
Division of Chemical Engineering, Pusan National University, Busan 609-735, Korea 1Korea Research Institute of Chemical Technology, Daejeon 305-600, Korea
dwpark@pusan.ac.kr
Korean Journal of Chemical Engineering, September 2010, 27(5), 1441-1445(5), 10.1007/s11814-010-0229-0
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Abstract
Ionic liquid immobilized on commercial silica catalysts proved to be an effective heterogeneous catalyst for the synthesis of dimethyl carbonate (DMC) from transesterification of ethylene carbonate (EC) with methanol. The immobilized 1-n-alkyl imidazolium halide ionic liquid on commercial silica (RImX-CS) was characterized by EA, BET, FT-IR, 13C NMR and 29Si NMR. It was found that RImX-CS with a longer alkyl chain length showed much better catalytic activity. RImX-CS with chloride (Cl-) as the counter anion showed the best catalytic activity. High temperature, high carbon dioxide pressure, and longer reaction time were favorable for the reactivity of BuImBr-CS. The catalyst can be reused for the reaction up to three consecutive runs without any considerable loss of its initial activity.
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Sun J, Wang L, Zhang SJ, Li ZX, Zhang XP, Dai WB, Mori RH, J. Mol. Catal. A-Chem., 256(1-2), 295 (2006)
Darensbourg DJ, Holtcamp MW, Coord. Chem. Rev., 153, 155 (1996)
Sakakura T, Choi JC, Yasuda H, Chem. Rev., 107(6), 2365 (2007)
