Chinese Journal of Applied Chemistry ›› 2020, Vol. 37 ›› Issue (12): 1447-1456.DOI: 10.11944/j.issn.1000-0518.2020.12.200097

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Preparation of Sulfonated Chiral Nematic Mesoporous Silicate Solid Acid and Its Catalytic Synthesis of Borneol

GUO Wei, WANG Yaming*, JIANG Lihong, ZHENG Yan'e, LIU Biying   

  1. Faculty of Chemical Engineering,Kunming University of Science and Technology,Kunming 650500,China
  • Received:2020-04-03 Revised:2020-07-13 Accepted:2020-08-19 Online:2020-12-01 Published:2020-12-07
  • Contact: WANG Yaming, professor;; Research interests:plant chemical industry and industrial catalysis
  • Supported by:
    Yunnan Rosin High Efficiency Development and Utilization Research(No.649220130010)

Abstract: Chiral nematic mesoporous silicate (CNMS) was prepared by a sol-gel method and sulfonated CNMS-SO3H solid acid catalyst was prepared by an impregnation method. The structure and properties of the catalysts were characterized by BET, powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy analysis (FT-IR), NH3-TPD and Py-FTIR. When the molar ratio of amount of substance of α-pinene to oxalic acid is 1∶0.4, the mass ratio of CNMS-SO3H catalyst to turpentine oil is 7∶100, the temperature is 100 ℃ and the time is 8 h, the conversion of α-pinene is 100% and the yield of borneol is 49.89% and the amount of borneol is 4 times of that of isoborneol. The solid acid catalyst has good catalytic activity and stability. After 8 times of reuse, the conversion of α-pinene is over 99%.

Key words: sulfonated chiral nematic mesoporous silicate, solid acid, esterification, borneol

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