Chem. J. Chinese Universities ›› 2024, Vol. 45 ›› Issue (6): 20240067.doi: 10.7503/cjcu20240067

• Physical Chemistry • Previous Articles     Next Articles

Catalysis and Simulation of SBA-15 Zeolite Supported p-Toluenesulfonic Acid for the Synthesis of Dicumyl Peroxide

ZHANG Xiaolong1, ZHANG Yicheng1, LI Qingchao2, ZHA Fei1(), CHANG Yue1, TANG Xiaohua1   

  1. 1.College of Chemistry & Chemical Engineering,Northwest Normal University,Lanzhou 730070,China
    2.Shandong Yanggu Huaitai Chemical Co. ,Ltd. ,Yanggu 252300,China
  • Received:2024-02-04 Online:2024-06-10 Published:2024-03-22
  • Contact: ZHA Fei E-mail:zhafei@nwnu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22268039);the University Industry Supported Project of Gansu Province, China(2023CYZC-18)

Abstract:

SBA-15 zeolite suppored p-toluenesulfonic acid(TsOH/SBA-15) was prepared using the impregnation method. The catalytic activity of TsOH/SBA-15 in synthesis of dicumyl peroxide(DCP) from α-methylstyrene(α-MS) reacted with isopropylbenzene hydroperoxide(CHP) was evaluated. Under the conditions of m(TsOH/SBA-15)/ m(CHP)=0.15%, nα-MS)/n(CHP)=2.0, 44 ℃ and 2.5 h, the yield of DCP was 62.1%. Simulation analysis suggested that the reaction process follows two mechanisms of asynchronous synergistic reaction and step-by-step reaction. α-MS, CHP, and TsOH undergo a single transition state in the asynchronous synergistic reaction process, while there are two transition states and one intermediate in the step-by-step reaction, both requiring H+ proton transformation. The reaction energy barrier in the asynchronous synergistic reaction was calculated to be 121.8 kJ/mol at 44 ℃, while the reaction energy barriers were 74.1 and 78.3 kJ/mol in the two transition states in the step-by-step reaction, respectively.

Key words: p-Toluenesulfonic acid, SBA-15 zeolite, Dicumyl peroxide, Isopropylbenzene hydroperoxide, Reaction energy barrier

CLC Number: 

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