Chinese Journal of Catalysis

Chinese Journal of Catalysis ›› 2009, Vol. 30 ›› Issue (5): 401-406.

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A Brønsted-Lewis Acidic Ionic Liquid: Its Synthesis and Use as the Catalyst in Rosin Dimerization

LIU Shiwei 1, XIE Congxia 2, YU Shitao 1,*, XIAN Mo 3, LIU Fusheng 1   

  1. 1College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, China 2College of Chemis-try and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, China3Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong, China
  • Online:2009-05-25 Published:2013-02-05

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Abstract: Brønsted-Lewis acidic ionic liquids 1-(3-sulfonic acid)-propyl-3-methylimidazole chlorozincinates ([HO3S-(CH2)3-mim]Cl-ZnCl2) were synthesized, characterized, and used to catalyze the dimerization of rosin. [HO3S-(CH2)3-mim]Cl-ZnCl2 (molar fraction of ZnCl2 x > 0.5) is both Brønsted and Lewis acidic, and [HO3S-(CH2)3-mim]Cl-ZnCl2 (x = 0.64) has good catalytic properties. The product can be easily separated from the reaction mixture, and the ionic liquid catalyst has good reusability.

Key words: Brø, nsted-Lewis acidic ionic liquid, rosin, dimerization, catalysis