SBA-15分子筛负载对甲苯磺酸催化合成过氧化二异丙苯的性能和反应过程模拟OA北大核心CSTPCD

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%,n(α-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 trans-formation.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.