[CnMIM]BF4型离子液体水洗反萃取回收方法的研究

石油炼制与化工 ›› 2013, Vol. 44 ›› Issue (6): 31-34.

[CnMIM]BF4型离子液体水洗反萃取回收方法的研究

李杨¹,孙淑英²,王强¹,周明东¹

1. 辽宁石油化工大学化学与材料科学学院
2. 中国石油抚顺石化公司

收稿日期:2012-09-13 修回日期:2012-12-31 出版日期:2013-06-12 发布日期:2013-05-24
通讯作者: 李杨 E-mail:liyang19ly@163.com
基金资助:
国家自然科学基金资助项目;中国石油天然气股份有限公司资助项目

STUDY ON REGENERATION OF IONIC LIQUIDS BY REVERSE EXTRACTION WITH WATER

Received:2012-09-13 Revised:2012-12-31 Online:2013-06-12 Published:2013-05-24

摘要/Abstract

摘要： 用蒸馏水作反萃取剂，对脱硫试验后的离子液体进行再生，考察了蒸馏水用量、水洗时间和萃取温度等条件对再生后离子液体脱硫效果的影响，并对烷基咪唑四氟硼酸盐类离子液体[C5MIM]BF4，[C7MIM]BF4，[C8MIM]BF4，[C10MIM]BF4进行了多次重复再生试验。结果表明，最佳再生条件为：V(H2O):V([CnMIM]BF4)=1︰2，在室温下萃取5 min，分离出水相后进一步对离子液体进行真空干燥除水。除[C5MIM]BF4对水具有一定的溶解性外，[C7MIM]BF4，[C8MIM]BF4，[C10MIM]BF4几乎不溶于水，再生15次后脱硫效果仍然良好，汽油脱硫率分别达到64.09 %，72.41 %，75.80 %。

Abstract: The desulfurization of gasoline by ILs is widely studied. The regeneration of ionic liquids using distilled water as reverse extraction agent was investigated in our laboratory. The regeneration rate was optimized by varying volume of water, washing time, and extraction temperature. The desulfurization effect was tested for FCC gasoline with the recycled ILs. The results show that the optimal regeneration conditions are：[C7MIM]BF4 are V(H2O):V(ILs)=1:2, extraction time of 5 min at room temperature. The water was then removed by vacuum evaporation. The recyclability of [C5MIM]BF4, [C7MIM]BF4, [C8MIM]BF, [C10MIM]BF4 by water extraction was also examined, and the results indicate that [C5MIM]BF4 represents a certain solubility in water and thus is not suitable to be recycled with water. Whereas, other ionic liquids are almost insoluble in water, and the effect of gasoline desulfurization is still satisfactory, reaching 64.09 %，72.41 %，75.80 % , respectively even through 15 times regeneration.

李杨孙淑英王强周明东. [CnMIM]BF4型离子液体水洗反萃取回收方法的研究[J]. 石油炼制与化工, 2013, 44(6): 31-34.