吡啶基离子液体+有机盐双水相体系相图的测定及盐析性能研究

林绪亮; 徐帅; 徐少杰; 袁慢景; 陈金珠; 李宇亮; 秦延林

doi:10.11949/0438-1157.20200243

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吡啶基离子液体+有机盐双水相体系相图的测定及盐析性能研究

热力学 | 更新时间：2026-07-24

- 吡啶基离子液体+有机盐双水相体系相图的测定及盐析性能研究
- Phase diagram of pyridyl ionic liquid + organic salt aqueous two-phase system and study of salting-out ability
- 化工学报 2020年71卷第11期页码：5067-5079
- 作者机构：
  
  1.广东工业大学轻工化工学院，广东广州 510006
  2.长安大学水利与环境学院，旱区地下水文与生态效应教育部重点实验室，陕西西安 710064
- 作者简介：
  
  林绪亮（1988—），男，博士，副教授，xllin@gdut.edu.cn
  徐帅（1995—），男，博士研究生，shuaixu012@hotmail.com
  秦延林（1986—），男，博士，特聘教授，博士生导师，ylqin@gdut.edu.cn
- 基金信息：
  
  广东省自然科学基金杰出青年项目(2019B151502038);国家自然科学基金项目(21706038;22078025;22078069);长安大学研究生科研创新实践项目(300103703058)
- DOI：10.11949/0438-1157.20200243
  中图分类号： TQ 028.8
- 收稿：2020-03-10，
  
  修回：2020-08-01，
  
  网络首发：2020-11-03，
  
  纸质出版：2020-11-05
- 稿件说明：
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林绪亮, 徐帅, 徐少杰, 袁慢景, 陈金珠, 李宇亮, 秦延林. 吡啶基离子液体+有机盐双水相体系相图的测定及盐析性能研究[J]. 化工学报, 2020, 71(11): 5067-5079

LIN Xuliang, XU Shuai, XU Shaojie, YUAN Manjing, CHEN Jinzhu, LI Yuliang, QIN Yanlin. Phase diagram of pyridyl ionic liquid + organic salt aqueous two-phase system and study of salting-out ability[J]. CIESC Journal, 2020, 71(11): 5067-5079
林绪亮, 徐帅, 徐少杰, 袁慢景, 陈金珠, 李宇亮, 秦延林. 吡啶基离子液体+有机盐双水相体系相图的测定及盐析性能研究[J]. 化工学报, 2020, 71(11): 5067-5079 DOI： 10.11949/0438-1157.20200243.

LIN Xuliang, XU Shuai, XU Shaojie, YUAN Manjing, CHEN Jinzhu, LI Yuliang, QIN Yanlin. Phase diagram of pyridyl ionic liquid + organic salt aqueous two-phase system and study of salting-out ability[J]. CIESC Journal, 2020, 71(11): 5067-5079 DOI： 10.11949/0438-1157.20200243.

摘要

测定了离子液体

-乙基吡啶四氟硼酸盐([EPy

]

)+有机盐[丁二酸钠（CH

COONa)

/柠檬酸铵C

(NH

)

/柠檬酸钠C

]

+水双水相体系在303.15、308.15和313.15 K下的双节线及系线数据。基于相图中的杠杆定律通过质量法研究双水相体系的系线，并用Othmer-Tobias方程、Bancroft方程等经验方程以及NRTL活度系数模型对数据进行关联。采用有效排除体积和Setschenow-type的拟合参数深入研究三种有机盐的盐析能力。结果表明，双节线的三个经验式拟合效果良好，但较多参数的经验式会导致部分参数失去意义；双水相体系的系线满足经验方程，数据可靠性较好，且均方根偏差表明系线数据很好地符合NRTL模型；低温更有利于该双水相体系的形成；三种盐都能和[EPy

]

离子液体形成双水相体系，且C

的盐析能力更优。本文提供的数据为离子液体的回收循环利用提供了理论参考依据。

Abstract

The binodal curve and tie-line data of

-ethylpyridinium tetrafluoroborate ([EPy

]

) + organic salts [sodium succinate((CH

COONa)

)/ammonium citrate (C

(NH

)

)/sodium citrate(C

)

]

ionic liquid-based aqueous two-phase systems have been studied. The tie-line data were determined using gravimetric method based on the lever rule. Then

the Othmer-Tobias

Bancroft equations and NRTL model were used to fit the data. The effective excluded volume of salt and Setschenow-type equation were used to investigate the salting-out ability of the three salts. As a result

all the t

hree empirical equations fit the binodal curves well

but some redundant parameters may be meaningless. The tie-lines data were satisfactory correlated to the equations

and show that the data is reliable. The root-mean-square deviation (RMSD) indicates tie-lines data fit NRTL model very well. The two-phase systems are easier to form at lower temperatures. All the three salts can form aqueous two-phase system with [EPy

]

and C

possesses stronger salting-out ability. The data provided in this article provides a theoretical reference for the recycling of ionic liquids.

关键词

Keywords

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