吡啶类离子液体在汽油萃取脱硫中的应用研究

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.