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过程工程学报 ›› 2016, Vol. 16 ›› Issue (4): 615-621.DOI: 10.12034/j.issn.1009-606X.215425

• 过程与工艺 • 上一篇    下一篇

[1ChCl:2EG]/CrCl3o6H2O低共熔溶剂的物化性质

张贤杰1,张志1,李坚2,华一新2,徐存英3,李艳2   

  1. 1. 昆明理工学
    2. 昆明理工大学冶金与能源工程学院
    3. 昆明理工大学材料与冶金工程学院
  • 收稿日期:2015-12-23 修回日期:2016-01-26 出版日期:2016-08-20 发布日期:2016-10-10
  • 通讯作者: 张贤杰 564194628@qq.com

Physico-chemical Properties of [1ChCl:2EG]/CrCl36H2O Deep Eutectic Solvents

ZHANG Xian-jie 1,ZHANG Zhi 1,LI Jian 2,HUA Yi-xin 2,XU Cun-ying 2,LI Yan 3   

  1. 1. Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology
    2. Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technolog
    3. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, P.R. China
  • Received:2015-12-23 Revised:2016-01-26 Online:2016-08-20 Published:2016-10-10
  • Contact: ZHANG Xian-jie 564194628@qq.com

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摘要： 实验研究了低共熔溶剂[1ChCl:2EG]/CrCl3?6H2O的熔点、密度、表面张力、粘度和电导率与CrCl3?6H2O浓度和温度的关系. 结果表明，[1ChCl:2EG]/CrCl3?6H2O的最低共熔点为211 K，具有较宽的低温液程；密度与温度呈良好的线性关系并随CrCl3?6H2O浓度升高略微增大；表面张力比水小但比传统的有机溶剂高，并随CrCl3?6H2O浓度升高而略微增大；温度从293 K升高到343 K，[1ChCl:2EG]/CrCl3?6H2O的粘度显著降低，而电导率则明显增大，CrCl3?6H2O浓度为0.3 mol/L时，该溶剂体系粘度最小，电导率最高；CrCl3?6H2O和[1ChCl:2EG]/(0.3 mol/L) CrCl3?6H2O在923 K下分解后产物都是CRO3；1ChCl:2EG和[1ChCl:2EG]/(0.3 mol/L) CrCl3?6H2O均可在383 K内保持稳定.

关键词: 低共熔溶剂, 离子液体, 氯化胆碱, 乙二醇, 六水合三氯化铬, 物化性质

Abstract: The melting points, density, surface tension, viscosity and conductivity of [1ChCl:2EG]/CrCl3?6H2O deep eutectic solvents (DESs) ionic liquids as a function of temperatures and concentration of CrCl3?6H2O had been studied, respectively. The results showed that [1ChCl:2EG]/CrCl3?6H2O DESs have the lowest melting points (211 K), indicating it has wider liquid range at low temperature. It shows a good linear relationship between the density and temperature, with the temperature increasing, the density increased slightly. The surface tension lower than water but higher than traditional organic solvent and increases with the concentration of the CrCl3?6H2O. As temperature increases from 293 K to 343 K, the viscosity of [1ChCl:2EG]/CrCl3?6H2O DESs decreases significantly, but the conductivity increases obviously, and the DESs have the minimum viscosity and the maximum conductivity at the concentration of 0.3 mol/L CrCl3?6H2O. The CrCl3?6H2O and [1ChCl:2EG]/(0.3 mol/L) CrCl3?6H2O DES were decomposed into CRO3 at 923 K, and could maintain stable performance below 383 K.

Key words: deep eutectic solvent, ionic liquid, choline chloride, ethylene glycol, chromic chloride hexahydrate, physico-chemical

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