MgO-PbO Catalyzed Synthesis of Diethylene Glycol Bis(allyl carbonate) by Transesterification Route
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- 作者：Hualiang An ; Zhuo Gao ; Xinqiang Zhao ; Yanji Wang
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2011
- 出版时间：July 6, 2011
- 年：2011
- 卷：50
- 期：13
- 页码：7740-7745
- 全文大小：894K
- 年卷期：v.50,no.13(July 6, 2011)
- ISSN：1520-5045
文摘
The catalytic performance of mixed metal oxides was evaluated for the synthesis of diethylene glycol bis(allyl carbonate) (ADC) by transesterification of diethylene glycol (DEG), dimethyl carbonate (DMC). and allyl alcohol (AAH), and MgO鈥揚bO was found to show the highest catalytic activity. The influence of preparation conditions on the catalytic performance of MgO鈥揚bO was studied and its suitable preparation conditions were as follows. A calcination process was used, with Mg(OH)2 and Pb(CH3COO)2路3H2O as precursors, molar ratio of Mg:Pb = 6:1, and calcination temperature of 650 掳C. Under the following reaction conditions, molar ratio of DEG:DMC:AAH = 0.08:1:2, weight percentage of MgO鈥揚bO = 1.5% of total weight of all reactants, 100 掳C, 6 h, and vacuum of 0.08 MPa, the yield of ADC was 97.3%. Moreover, MgO鈥揚bO showed a good recyclability; ADC yield of 95.4% could be achieved after the catalyst was reused for two times. The results of N2 adsorption鈥揹esorption measurement and XPS analyses for MgO鈥揚bO indicate there exists an interaction between MgO and PbO, which promotes the catalytic performance and recyclability of MgO鈥揚bO. Furthermore, the reaction pathway for ADC synthesis was elucidated by means of GC-MS analysis and experimental verification.