低共熔法萃取分离油酚混合物过程中油的夹带

doi:10.11949/j.issn.0438-1157.20150170

化工学报 ›› 2015, Vol. 66 ›› Issue (S1): 247-252.DOI: 10.11949/j.issn.0438-1157.20150170

低共熔法萃取分离油酚混合物过程中油的夹带

王震¹, 侯玉翠², 任树行¹, 孔洁¹, 吴卫泽¹

1 北京化工大学化学工程学院, 化工资源有效利用国家重点实验室, 北京 100029;
2 太原师范学院化学系, 山西太原 030031

收稿日期:2015-02-02 修回日期:2015-02-12 出版日期:2015-06-30 发布日期:2015-06-30
通讯作者: 吴卫泽
基金资助:
国家重点基础研究发展计划项目(2011CB201303);高等学校博士学科点专项科研基金博导类资助课题(20120010110005);山西省回国留学人员科研项目(2011-086)。

Oil entrainment during separating phenols from model oils via forming deep eutectic solvents

WANG Zhen¹, HOU Yucui², REN Shuhang¹, KONG Jie¹, WU Weize¹

1 State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
2 Department of Chemistry, Taiyuan Normal University, Taiyuan 030031, Shanxi, China

Received:2015-02-02 Revised:2015-02-12 Online:2015-06-30 Published:2015-06-30
Supported by:
supported by the National Basic Research Program of China (2011CB201303), the Specialized Research Fund for the Doctoral Program of Higher Education(20120010110005) and the Shanxi Scholarship Council of China (2011-086).

摘要/Abstract

摘要：

采用季铵盐与酚形成低共熔溶剂(DES)从含酚的混合物中萃取分离酚是一种有效的油酚分离方法, 然而分离过程中, 中性油的夹带会影响分离效率。以含苯酚200 g·L^-1的甲苯溶液作为模拟油酚混合物, 氯化胆碱(ChCl)作为分离剂, 研究了氯化胆碱的加入量、萃取温度(25～55℃)及模拟油中直链烷烃的浓度等因素对酚的萃取分离及中性油夹带的影响。结果表明, 随着ChCl加入量增大, 酚萃取率升高, 中性油的夹带量减少;ChCl过量时, 酚的萃取量恒定且达到极大值, 中性油夹带量恒定且夹带量最小;萃取温度对酚的萃取率影响不大, 对中性油的夹带量在ChCl加入量不足时随温度升高而增多, 当ChCl加入量足量时与温度变化关系不大;模拟油中直链烷烃的浓度不影响萃取效率, 浓度越高, 甲苯夹带越少。以ChCl萃取含苯酚200 g·L^-1的甲苯溶液, 在萃取温度25℃、ChCl加入量大于0.6(与酚的摩尔比)的条件下, 苯酚萃取率达95%, 甲苯夹带率为15%, 70℃条件下氮气吹扫60 min内可将DES中甲苯完全去除。

关键词: 低共熔, 油酚混合物, 分离, 夹带

Abstract:

Separation of phenols from oil via forming deep eutectic solvents (DES) is an efficient method. During the extraction, however, oil entrainment occurs, which influences the separation efficiency. In this work, the effects of added choline chloride (ChCl) amount, extraction temperature and concentration of straight-chain paraffin in model oil on the separation of phenols and oil entertainment in DES phase via forming DES were investigated. Toluene solution with 200 g·L^-1 phenol was used as model oil and ChCl was used as extraction agent. The results showed that the separation efficiency of phenol from model oil increased with the increase of addition of ChCl and the increase of addition of ChCl could also reduce the entrainment of toluene in DES phase. The effect of temperature on the separation of phenol was not significant. The entrainment of toluene increased with the increase of temperature at low ratios of added ChCl to phenol; while it did not change significantly at high ratios of added ChCl to phenol. The entrainment of toluene was reduced with the increase of the concentration of aliphatic hydrocarbon. With ChCl as extraction agent, typically, the separation efficiency of phenol was 95% and the entrainment of toluene was 15% at 25℃ and mole ratio of ChCl to phenol of more than 0.6. Toluene could be removed completely within 60 min with nitrogen purging at 70℃.

Key words: deep eutectic solvent, phenol-oil mixture, separation, entrainment

中图分类号:

TQ43.1

王震, 侯玉翠, 任树行, 孔洁, 吴卫泽. 低共熔法萃取分离油酚混合物过程中油的夹带[J]. 化工学报, 2015, 66(S1): 247-252.

WANG Zhen, HOU Yucui, REN Shuhang, KONG Jie, WU Weize. Oil entrainment during separating phenols from model oils via forming deep eutectic solvents[J]. CIESC Journal, 2015, 66(S1): 247-252.

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低共熔法萃取分离油酚混合物过程中油的夹带

Oil entrainment during separating phenols from model oils via forming deep eutectic solvents

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