Synthesis of glycerol carbonate using ionic liquids catalysts

被引：0
|
作者：
Miao C. [1 ]
Lyu P. [1 ]
Wang Z. [1 ]
Yang L. [1 ]
Luo W. [1 ]
Li H. [1 ]
机构：
[1] Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2021年 / 42卷 / 07期
关键词：
Biodiesel; Dimethyl carbonate; Glycerol; Glycerol carbonate; Ionic liquid;
D O I：
10.19912/j.0254-0096.tynxb.2019-0440
中图分类号：
学科分类号：
摘要：
In this study, a series of acidic, basic and neutral ionic liquids were synthesized by two-step method. Their structures were characterized by FT-IR spectra, NMR. The detection and analysis showed that their structures were in accordance with their theoretical structure. These synthetic ionic liquids were then used as catalysts to catalyze the synthesis of glycerol and dimethyl carbonate into glycerol carbonate. The effects of molar ratio of glycerol to dimethyl carbonate, reaction temperature, reaction time and ionic liquid dosage on transesterification and stability of the ionic liquid were investigated. The results showed that the basic ionic liquids have higher catalytic activity compared with acidic, neutral ionic liquids and inorganic basic catalysts in the transesterification. With [Bmim]Im ionic liquid as the catalyst, when w(dimethyl carbonate): w(glycerin) was 3:1, the reaction temperature was 80℃, reaction time was 70 minutes, and ionic liquid (catalyst) dosage was 12% of the glycerol mass, glycerin conversion rate was 96%, and the selectivity and yield of glycerol carbonate was 97% and 94%, respectively. After recycling ionic liquid for eight times, glycerin conversion rate can still reach 85%, and the selectivity of glycerol carbonate can reach approximately 90%. The above study reveals that synthetic basic ionic liquid was an ideal green catalyst in esterification reaction. © 2021, Solar Energy Periodical Office Co., Ltd. All right reserved.
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页码：474 / 480
页数：6
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