SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2021, Vol. 36 ›› Issue (8): 120-127.DOI: 10.1016/j.cjche.2020.10.005

• Catalysis, Kinetics and Reaction Engineering • Previous Articles     Next Articles

Reactive extraction for synthesizing long chain ester butyl hexanoate intensified by deep eutectic solvent

Yishan Zhou1,2, Hao Qin1, Hongye Cheng1, Lifang Chen1, Bingjian Zhang2, Zhiwen Qi1   

  1. 1 State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
    2 Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong Province, Sun Yat-sen University, Guangzhou 510275, China
  • Received:2020-07-16 Revised:2020-09-11 Online:2021-09-30 Published:2021-08-28
  • Contact: Hao Qin, Zhiwen Qi
  • Supported by:
    The financial support from National Natural Science Foundation of China (21776074 and 21576081) is greatly acknowledged.

Reactive extraction for synthesizing long chain ester butyl hexanoate intensified by deep eutectic solvent

Yishan Zhou1,2, Hao Qin1, Hongye Cheng1, Lifang Chen1, Bingjian Zhang2, Zhiwen Qi1   

  1. 1 State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
    2 Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong Province, Sun Yat-sen University, Guangzhou 510275, China
  • 通讯作者: Hao Qin, Zhiwen Qi
  • 基金资助:
    The financial support from National Natural Science Foundation of China (21776074 and 21576081) is greatly acknowledged.

Abstract: Butyl hexanoate (BuHE) is an important long-chain ester that is widely used in the food, beverage and cosmetic industries. In this work, reactive extraction concept was proposed to intensify the BuHE formation in a biphasic system, in which deep eutectic solvent (DES) comprising 2-methylimidazole (2-MIm) and p-toluenesulfonic acid (PTSA) was used as dual solvent-catalyst. First, the effect of 2-MIm to PTSA molar ratio on esterification was investigated to determine the optimum DES of[2-MIm:2PTSA], which was characterized by FT-IR and TGA. Then, the liquid-liquid equilibrium (LLE) and esterification experiments were carried out to confirm the extraction and catalytic effect of[2-MIm:2PTSA], respectively. Afterwards, the pseudo-homogeneous kinetic model was employed to describe the esterification kinetics. Finally, the intensification mechanism of reactive extraction for BuHE formation was proposed according to the experiments and interaction effect analysis.

Key words: Esterification, Reactive extraction, Deep eutectic solvent, Catalysis effect, Solvent effect, Pseudo-homogeneous kinetic model

摘要: Butyl hexanoate (BuHE) is an important long-chain ester that is widely used in the food, beverage and cosmetic industries. In this work, reactive extraction concept was proposed to intensify the BuHE formation in a biphasic system, in which deep eutectic solvent (DES) comprising 2-methylimidazole (2-MIm) and p-toluenesulfonic acid (PTSA) was used as dual solvent-catalyst. First, the effect of 2-MIm to PTSA molar ratio on esterification was investigated to determine the optimum DES of[2-MIm:2PTSA], which was characterized by FT-IR and TGA. Then, the liquid-liquid equilibrium (LLE) and esterification experiments were carried out to confirm the extraction and catalytic effect of[2-MIm:2PTSA], respectively. Afterwards, the pseudo-homogeneous kinetic model was employed to describe the esterification kinetics. Finally, the intensification mechanism of reactive extraction for BuHE formation was proposed according to the experiments and interaction effect analysis.

关键词: Esterification, Reactive extraction, Deep eutectic solvent, Catalysis effect, Solvent effect, Pseudo-homogeneous kinetic model