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以氯化正丁基吡啶-三氯化铝(bpc-AlCl3)离子液体为催化剂,考察了离子液体催化剂的酸度、反应温度、反应压力、苯与丙烯摩尔比、反应时间等因素对苯与丙烯烷基化反应的影响。结果表明,酸性离子液体具有较高的催化活性与选择性,并且离子液体的活性与其酸度密切相关,酸度越大,离子液体的催化活性越好。在50℃、常压、反应时间1h、苯与丙烯摩尔比为10、AlCl3与bpc 摩尔比为2．00时,丙烯转化率为100％,异丙苯选择性为97．56％;离子液体可以循环使用,重复使用4次后,丙烯转化率和异丙苯选择性均无明显变化。
The influences of acidity, reaction temperature, reaction pressure, molar ratio of benzene to propylene, reaction time and other factors on the catalytic performance of benzene and propylene were investigated by using bpc-AlCl3 ionic liquid as catalyst. Alkylation reaction. The results show that the acidic ionic liquid has high catalytic activity and selectivity, and the ionic liquid activity is closely related to its acidity. The greater the acidity, the better the ionic liquid catalytic activity. Under the conditions of 50 ℃, atmospheric pressure, reaction time 1h, molar ratio of benzene to propylene 10 and AlCl3 to bpc molar ratio 2.00, the conversion of propylene was 100% and the selectivity of cumene was 97.56% Can be recycled, repeated use of 4 times, propylene conversion and cumene selectivity were no significant changes.