催化学报

催化学报 ›› 2010, Vol. 31 ›› Issue (12): 1433-1438.

• 研究论文 • 上一篇    下一篇

酸性离子液体催化脂肪酸甲酯聚合制备二聚酸甲酯

刘仕伟 1, 李露 1, 于世涛 1, 解从霞 2, 刘福胜 1, 宋湛谦 1,3   

  1. 1青岛科技大学化工学院, 山东青岛 266042; 2青岛科技大学化学与分子工程学院, 山东青岛 266042; 3中国林业科学研究院林产化学工业研究所, 江苏南京 210042
  • 收稿日期:2010-05-25 出版日期:2010-12-13 发布日期:2014-04-26

Polymerization of Fatty Acid Methyl Ester Using Acidic Ionic Liquid as Catalyst

LIU Shiwei1, LI Lu1, YU Shitao1,*, XIE Congxia2, LIU Fusheng1, SONG Zhanqian1,3   

  1. 1College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, China; 2College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, China; 3Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, Jiangsu, China
  • Received:2010-05-25 Online:2010-12-13 Published:2014-04-26

PDF

1276

被引次数

30

摘要： 以 Brönsted-Lewis 酸性离子液体为催化剂, 用于催化生物柴油中不饱和脂肪酸甲酯聚合制备二聚酸甲酯反应, 考察了催化剂种类、催化剂用量、反应温度和时间等因素对聚合反应性能的影响, 得到较佳的反应条件. 结果表明, 当以 1-(3-磺酸)-丙基-3-甲基咪唑氯锌酸盐[HO3S-(CH2)3-mim]Cl-ZnCl2 (ZnCl2 摩尔分数为 0.67) 为催化剂, 生物柴油 15 g, m(生物柴油):m(离子液体) = 15:1, 于 240 oC 下反应 6 h 时, 二聚酸甲酯收率为 63.2%, 其中三聚体含量小于 5%. 另外, 该催化剂重复使用 5 次后, 二聚酸甲酯收率仍超过 63%, 表明其具有较好的重复使用性能. 离子液体的 Brönsted 和 Lewis 酸位的协同效应显著提高了其催化活性.

关键词: 酸性离子液体, 生物柴油, 脂肪酸甲酯, 聚合, 二聚酸甲酯

Abstract: The polymerization of fatty acid methyl ester was investigated using biodiesel as the feed in the presence of a Brönsted-Lewis acidic ionic liquid (IL). A synergetic effect of Brönsted and Lewis acid sites enhanced the catalytic performance of the IL. 1-(3-Sulfonic acid)-propyl-3-methylimidazole chlorozincinate ([HO3S-(CH2)3-mim]Cl-ZnCl2, molar fraction of ZnCl2 was 0.67) was an efficient catalyst for the polymerization. The effects of catalyst amount, reaction temperature, and reaction time were investigated. The optimum conditions for the polymerization were: biodiesel 15 g, m(biodiesel):m(IL) = 15:1, reaction temperature 240 oC, and reaction time 6 h, which gave 63.2% yield of dimeric acid methyl ester. The reusability of the IL was good and after it was used five times, the dimeric acid methyl ester yield was still > 63%.

Key words: acidic ionic liquid, biodiesel, fatty acid methyl ester, polymerization, dimeric acid methyl ester