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| Dimethyl carbonate synthesis via transesterification catalyzed by quaternary ammonium salt functionalized chitosan |
| Yuan Zhaoa,b, Liang Nian Hea, Yuan Yi Zhuangb, Jin Quan Wanga |
a State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China;
b College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China |
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Abstract A quaternary ammonium salt covalently linked to chitosan was first used as a catalyst for dimethyl carbonate (DMC) synthesis by the transesterification of propylene carbonate (PC) with methanol. The effects of various reaction variables like reaction time, temperature and pressure on the catalytic performance were also investigated. 54% DMC yield and 71% PC conversion were obtained under the optimal reaction conditions. Notably, the catalyst was able to be reused with retention of high catalytic activity and selectivity. Consequently, the process presented here has great potential for industrial application due to its advantages such as stability, easy preparation from renewable biopolymer, and simple separation from products.
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Received: 09 October 2007
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| Fund:This work was financially supported by National Science Foundation of China (Nos. 20472030, 20421202, and 20672054), and the Committee of Science and Technology of Tianjin (No. 05YFJMJC00800). |
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Corresponding Authors:
Jin Quan Wang,E-mail address:heln@nankai.edu.cn
E-mail: heln@nankai.edu.cn
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