Ren Qinggong, Pan Jingjing, Zhou Jie, Na Yinna, Chen Changle, Li Weimin
School of Pertrochemical Engineering, Changzhou University, Changzhou 213164, China.
Chinese Academy of Science Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
Materials (Basel). 2015 Sep 24;8(10):6623-6632. doi: 10.3390/ma8105326.
The optimization and kinetics of the ring-opening reaction of an epoxidized biodiesel (epoxidized rapeseed oil methyl ester) (EBD) with 2-ethyl hexanol (2-EH) were studied. The determined optimum conditions were 4:1 2-EH/oil molar ratio, 90 °C, 18 h, and 7 wt % of Amberlyst D001 (dry) catalyst; the product's oxirane oxygen content was 0.081% with 38.32 mm²/s viscosity at 40 °C. The catalyst retained its high catalytic power after recycling five times. Furthermore, the determined non-catalyzed activation energy was 76 kJ·mol and 54 kJ·mol with the D001 resin catalyst. The product's chemical structure was investigated through FT-IR and ¹H NMR. The viscosity, flash point, pour point, and anti-wear properties of the product were improved compared with those of epoxidized biodiesel.
研究了环氧化生物柴油（环氧化菜籽油甲酯）（EBD）与2-乙基己醇（2-EH）开环反应的优化及动力学。确定的最佳条件为2-EH/油摩尔比4:1、90℃、18小时以及7 wt%的Amberlyst D001（干燥）催化剂；产物的环氧乙烷氧含量为0.081%，40℃下粘度为38.32 mm²/s。该催化剂循环使用五次后仍保持高催化活性。此外，测定的无催化剂活化能为76 kJ·mol，使用D001树脂催化剂时为54 kJ·mol。通过傅里叶变换红外光谱（FT-IR）和核磁共振氢谱（¹H NMR）对产物的化学结构进行了研究。与环氧化生物柴油相比，产物的粘度、闪点、倾点和抗磨性能均有所改善。
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