酯交换
碳酸二甲酯
化学
甲醇
催化作用
1,4-丁二醇
碳酸盐
活化能
碳酸二乙酯
傅里叶变换红外光谱
动力学
核化学
分析化学(期刊)
有机化学
化学工程
物理化学
碳酸乙烯酯
物理
电极
量子力学
工程类
电解质
作者
Yibo Zhao,Tingting Pei,Fangyan Li,Guoliang Zhao,Zhen-Cong Yang
摘要
Abstract The kinetic behavior of bis(2‐methyl) butylene carbonate (BMBC) by the transesterification of dimethyl carbonate (DMC) with 1,4‐butanediol (BDO) was investigated experimentally and theoretically. The Fourier transform infrared spectroscopy (FTIRs) test confirmed that the BMBC was successfully synthesized. The optimum preparation process of BMBC was investigated at atmospheric pressure, where Zn(Ac) 2 ∙2H 2 O was the best catalyst for this transesterification reaction, and the optimal concentration was 0.3 wt%. The conversion was determined by measuring the amount of methanol produced during the reaction by refractometric method. A kinetic model was proposed according to the experimental results. The results showed that the transesterification reaction was a pseudo‐first‐order reaction. The apparent activation energy ( E a ) significantly decreased with the increase of catalyst concentration from 0.1 wt% to 0.5 wt%. The E a of the reaction was 102.13, 84.36, and 70.18 kJ mol −1 , respectively, when the catalyst concentration was 0.1 wt%, 0.3 wt%, and 0.5 wt%. Furthermore, the parameters of the optimal heating curve in the batch reactor was obtained according to the optimal model.
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