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季铵盐低共熔法分离油酚混合物体系的密度和黏度

发表时间:2016-10-15  浏览量:1401  下载量:394
全部作者: 刘东东,任树行,纪柚安,么聪菲,吴卫泽
作者单位: 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
摘 要: 为给低共熔法分离油酚混合物的工业化应用提供数据支持,研究测定了具有应用前景的氯化胆碱(ChCl)-苯酚-甲苯、ChCl-邻甲酚-甲苯、ChCl-间甲酚-甲苯及1-丁基-3-甲基咪唑氯盐([bmim]Cl)-苯酚-甲苯三组分体系在温度298.15~368.15 K、甲苯相对摩尔比(甲苯/季铵盐)0~0.8条件下的密度、黏度数据。结果表明,季铵盐-酚-甲苯三组分体系的密度随温度升高和甲苯摩尔分数增多而下降。季铵盐-酚-甲苯三组分体系的黏度随温度和甲苯相对摩尔比变化很大:温度上升或甲苯相对摩尔比增加,体系黏度下降。研究通过Redlich-Kister方程对体系的超额摩尔体积与温度进行关联(R2=1),使用Jouyban-Acree模型对体系的黏度与温度和甲苯含量进行关联(R2=0.999 998),获得了季铵盐-苯酚-甲苯三组分体系的热力学参数(超额摩尔体积、偏摩尔体积、黏滞活化自由能和超额黏滞活化自由能),发现甲苯填充在ChCl和苯酚形成的低共熔溶剂(deep eutectic solvents,DES)的空穴结构中。
关 键 词: 物理化学;黏度;密度;低共熔溶剂;季铵盐-酚-甲苯三组分体系;关联
Title: Measurement and correlation of density and viscosity of quaternary ammonium salt-phenolic compound-toluene mixtures for their separation via forming deep eutectic solvents
Author: LIU Dongdong, REN Shuhang, JI Youan, YAO Congfei, WU Weize
Organization: State Key Laboratory of Chemical Resource Engineering, College of Chemical Engineering, Beijing University of Chemical Technology
Abstract: Densities and viscosities of deep eutectic solvents (DES) are basic data for the application of DES in separation of phenols from oil mixtures. In this work, we measured densities and viscosities of four ternary systems of quaternary ammonium salt-phenolic compound-toluene, including choline chloride (ChCl)-phenol-toluene, ChCl-o-cresol-toluene, ChCl-m-cresol-toluene, and 1-butyl-3-methylimidazolium chloride ([bmim]Cl)-phenol-toluene, which showed a potential application. Densities and viscosities of the quaternary ammonium salt-phenolic compound-toluene ternary systems were measured at temperatures from 298.15 to 368.15 K with toluene’s relative mole fractions from 0 to 0.8. The results indicate that the density declines with the increase of temperature and toluene’s relative mole fraction, the viscosity decreases with the increase of temperature and toluene’s relative mole fraction. Redlich-Kister equation was used to correlate the excess molar volume of the ternary systems with a correlation coefficient (R2) of 1. Jouyban-Acree model was used to correlate the viscosity of the ternary systems with a correlation coefficient (R2) of 0.999 998. Thermodynamic parameters (excess molar volume, partial molar volume, viscous free energy, and excess viscous free energy) were obtained via the correlated results. The results also indicate that toluene is filled in pore structure of DES formed by quaternary ammonium salt and phenol.
Key words: physical chemistry; viscosity; density; deep eutectic solvents; quaternary ammonium salt-phenolic compound-toluene ternary system; correlation
发表期数: 2016年10月第19期
引用格式: 刘东东,任树行,纪柚安,等. 季铵盐低共熔法分离油酚混合物体系的密度和黏度[J]. 中国科技论文在线精品论文,2016,9(19):2041-2050.
 
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