摘要
以不同的无机碱和有机碱作为催化剂,乙腈为溶剂,研究了二氧化碳和丙三醇合成丙三醇碳酸酯的反应。结果发现碱性增强有利于反应的进行,在所选用的无机碱或有机碱中,Cs2CO3和TBD分别显示了最高的催化活性。乙腈在反应过程中不仅作为溶剂同时还起到了脱水剂的作用,极大地提高了丙三醇的转化率和丙三醇碳酸酯的收率。
Glycerol carbonate is synthesized from carbon dioxide and glycerol in the presence of acetonitrile with different inorganic bases and organic bases as catalysts. The results indicate that the yield of glycerol carbonate appeares to be dependent on the basicity, and the strong bases are favorable for the reaction due to their spontaneous ability for the hydrolysis of CH3CN. Among the catalysts, Cs2CO3 and TBD exhibit the highest catalytic activity, respectively. Further investigations on the role of CH3CN show that acetonitrile, in the reaction, not only acts as the solvent but also the dehydrating reagent to take away partially the water produced in the reaction and then the thermodynamic equilibrium is shifted to improve the conversion of glycerol and the yield of glycerol carbonate. At the same time, the experimental results show that solvation of CH3CN has a very important effect on the reaction of carbon dioxide and glycerol.
出处
《现代化工》
CAS
CSCD
北大核心
2008年第10期35-37,共3页
Modern Chemical Industry
关键词
丙三醇碳酸酯
碱催化
二氧化碳
丙三醇
glycerol carbonate
base catalysis
carbon dioxide
glycerol
