화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.16, No.3, 474-478, May, 2010
DOI10.1016/j.jiec.2010.01.054  Export Citation
Synthesis of dimethyl carbonate from ethylene carbonate and methanol using immobilized ionic liquid on amorphous silica
Dong-Woo Kim, Cheol-Woong Kim1, Jae-Cheon Koh1, and Dae-Won Park†
  • Division of Chemical Engineering, Pusan National University, Busan 609-735, Republic of Korea
  • 1Korea Research Institute of Chemical Technology, Daejeon 305-600, Republic of Korea
E-mail:
Ionic liquid immobilized on mesoporous amorphous silica was prepared from the coupling of 1- (triethoxysilylpropyl)-3-n-alkyl-imidazolium halides with tetraethyl orthosilicate (TEOS) through template-free condensation under strong acidic conditions. The immobilized 1-n-butyl-3-methyl imidazolium bromide ionic liquid on amorphous silica (BMImBr-AS) was characterized by EA, N2 adsorption, FT-IR, 13C NMR and 29Si NMR. The immobilized amount of IL was 1.27 mmol/g-SiO2 and surface area was 652 m2/g with bimodal distribution of pores. The average pore diameter was 3.3 and 24.6 nm, respectively. The silica-supported ionic liquids were proved to be an effective heterogeneous catalyst for the synthesis of dimethyl carbonate (DMC) from transesterification of ethylene carbonate (EC) with methanol. High temperature, high carbon dioxide pressure, and longer reaction time were favorable for the reactivity of BMImBr-AS. The catalyst can be reused for the reaction up to three consecutive runs with a slight decrease of its catalytic activity.
Keywords:Dimethyl carbonate;Ethylene carbonate;Methanol;Immobilization;Ionic liquid
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