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摘要: 由无水三氯化铝与盐酸三乙胺按照不同摩尔比合成了具有不同酸度的室温离子液体，并考察了其酸性以及对正己烷异构化反应的催化性能。结果发现，随着离子液体合成时AlCl3比例的增大，离子液体的酸性增强，且离子液体2AlCl3/Et3NHCl对正己烷异构化显示出优良的催化性能。针对离子液体2AlCl3/Et3NHCl，考察了反应时间、反应温度和催化剂用量（剂油体积比）对正己烷异构化反应的影响。结果表明，反应条件对异构烷烃选择性的影响不大，但是对原料转化率、异构烷烃产率和液体收率有较大的影响。离子液体催化正己烷异构化的最佳反应条件，反应温度为50℃，反应时间为45min，剂油体积比为1∶1。Abstract: Room temperature acidic ionic liquids were synthesized with AlCl3 to Et3NHCl; their acidity and catalytic performance in normal hexane isomerization were investigated. The effects of reaction time, reaction temperature and catalyst-to-oil volume ratio on n-hexane isomerization were examined. The results show that the acidity of ionic liquids increases with the mole ratio of AlCl3 to Et3NHCl for the synthesis. The ionic liquid 2AlCl3/Et3NHCl exhibits excellent catalytic performance in the isomerization of n-hexane. The reaction conditions have significant influence on the conversion of nhexane and the yields of isoparaffins and total liquid components; however, the selectivity of isoparaffins varies slightly with any change in the reaction conditions. The optimal reaction conditions are 50℃, reaction time of 45min and catalyst-to-oil volume ratio of 1∶1.
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Key words:
- ionic liquid /
- hexane /
- isomerization /
- aluminum chloride
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