吡啶类离子液体在汽油萃取脱硫中的应用研究

摘要: 利用合成的六种吡啶类离子液体，N-丁基吡啶硝酸盐离子液体(BPyNO3)，N-乙基吡啶硝酸盐离子液体(EPyNO3)，N-丁基吡啶四氟硼酸盐离子液体(BPyBF4)，N-乙基吡啶四氟硼酸盐离子液体(EPyBF4)、N-乙基吡啶乙酸盐(EPyAc)、N-丁基吡啶乙酸盐(BPyAc)，进行了汽油萃取脱硫的应用研究。结果表明，BPyBF4的脱硫效果最好，EPyBF4的脱硫效果最差。BPyBF4对模型化合物单程脱硫率达到45.5％，可以有效地脱除汽油中的含硫化合物，使用过的离子液体可以通过真空加热或用四氯化碳反萃取再生。

Abstract: Six N-alkylpyridiniumbased ionic liquids, N-butylpyridinium nitrate (BPyNO3), N-ethylpyridinium nitrate (EPyNO3), N-butylpyridinium tetrafluoroborate (BPyBF4), N-ethylpyridinium tetrafluoroborate (EPyBF4), N-ethylpyridinium acetate(EPyAc), N-butylpyridinium acetate(BPyAc) were prepared and tested in the extraction desulfurization of gasoline. It is found that BPyBF4 has the best effect on the selective removal of sulfurcontaining compounds from gasoline at room temperature among these ionic liquids. The extraction rate of BPyBF4 is 45.5%. The desulfurization effect of EPyBF is the lowest. The used ionic liquids can be regenerated by rotary evaporation or re-extraction using tetrachloromethane.