离子液体合成及多级逆流萃取脱硫的串级实验法验证研究

石油炼制与化工 ›› 2014, Vol. 45 ›› Issue (2): 26-30.

离子液体合成及多级逆流萃取脱硫的串级实验法验证研究

李珂¹,王强¹,李国嬖²,臧树良¹

1. 辽宁石油化工大学化学与材料科学学院

2. 中国海洋大学化学化工学院

收稿日期:2013-07-03 修回日期:2013-09-04 出版日期:2014-02-12 发布日期:2014-01-17
通讯作者: 王强 E-mail:qwang0124@126.com
基金资助:
中国石油天然气股份有限公司资助项目

SYNTHESIS OF IONIC LIQUID AND VERIFICATION OF MULTI-STAGE COUNTER CURRENT EXTRACTION DESULFURIZATION BY STRING CLASS EXPERIMENT METHOD

Received:2013-07-03 Revised:2013-09-04 Online:2014-02-12 Published:2014-01-17

摘要/Abstract

摘要： 通过两步合成法合成了1-庚基-3-甲基咪唑四氟硼酸盐离子液体（[C7MIM]BF4），以30%的过氧化氢作氧化剂，考察了其在不同剂油比、萃取时间、萃取温度、萃取速率下对汽油的脱硫效果，确定了最佳脱硫条件，计算出离子液体多级逆流萃取脱硫的理论级数，并在此条件下平行做三组串级实验，进行多级逆流萃取脱硫的模拟验证。结果表明，在V([C7MIM]BF4):V(H2O2):V(Oil)=1:1:10、反应温度60 ℃、震荡速率600 r/min的条件下反应60 min后，一次脱硫率达到77 %，采用四级逆流萃取脱硫后，汽油的硫质量分数由155 μg/g降至10 μg/g以下，脱硫率达到94 %，汽油回收率达到95 %，具有较好的工业应用前景。

Abstract: In this article, the immobilized 1-heptyl-3-methylimidazolium borofluoride ionic liquid was synthesized by two-steps synthesis. The ionic liquid was applied as extracting reagent for oil desulfurization using hydrogen peroxide (30%) as the oxidant. The desulfurization conditions were checked and optimized by changing the ratio of ILs/oil, extraction time, temperature, and rate. Theoretical stages of the multi-stage countercurrent extraction desulfurization of the ionic liquid were also calculated and verified by three sets of parallel string class simulation experiment under the optimized conditions. The results show that the best desulfurization rate of 77% for FCC gasoline was obtained after 60 minutes at V(IL):V(H2O2):V(Oil)=1:1:10, 60℃ and revolution speed of 600 r/min. After the 4 stages counter current extraction, the sulfur content of the feed gasoline decreases to 10 μg/g with the sulfur removal efficiency of 94% and the gasoline recovery of 95%, which shows good perspective for industrial applications.

李珂王强李国嬖臧树良. 离子液体合成及多级逆流萃取脱硫的串级实验法验证研究[J]. 石油炼制与化工, 2014, 45(2): 26-30.