Al-MCM-41固载离子液体催化-合成长链烷基苯

Catalytic Synthesis of Long-chain Alkylbenzene by Al-MCM-41 Supported Ionic Liquid

为了合成高效的固体催化剂,离子液体被引入到介孔分子筛中。采用水热合成法制备了Al-MCM-41介孔分子筛,并浸渍离子液体制备出一种固载化催化剂。通过FT-IR、TG、N2吸附-脱附等方法进行表征,分析其晶型结构,成功将离子液体固载到Al-MCM-41介孔分子筛上。通过对工艺条件的考察和正交实验设计,确定了最佳反应条件。当苯烯摩尔比为8:1、反应温度为200℃、空速1.5h-1、压力3MPa时,反应的转化率和选择性综合达到最佳,Al-MCM-41固载离子液体催化剂的烯烃转化率为95.32%。

In order to develop a highly efficient solid catalyst system, the ionic liquid is introduced into mesoporous molecular sieves of AI-MCM-41. Under the hydrothermal condition, the mesoporous molecular sieves of A1-MCM-41 are synthesized, to prepare the supported catalyst, dipped in the ionic liquid. The product is further characterized by FT-IR, TG, N2 adsorp/desorp and elemental analyses. It is shown that the ionic liquid is grafted into the mesoporous molecular sieves of A1-MCM-4I successfully. The optimum reaction conditions are determined by the process of the orthogonal experimental design. Under the optimized reaction conditions, it is shown that when the molar ratio of benzene/olefin is 8：1, at the temperature of 200~C, with airspeed of 1.Sh-1 and pressure of 3MPa, the conversion rate of olefin and the selectivity are best. Under the optimum reaction conditions, the conversion rate of olefin with A1- MCM-41 grafted by the ionic liquid catalyst is 95.32%.