[Epy]Br-NaH_2PO_4-H_2O离子液体双水相体系液液相平衡测定及其关联  

Measurement and correlation of liquid-liquid equilibrium data for [Epy]Br-H_2O-NaH_2PO_4 system

作　　者：李宇亮[1] 苏杭[1] 张梦诗[1] 

机构地区：[1]长安大学环境科学与工程学院,陕西西安710018

出　　处：《计算机与应用化学》2013年第5期463-466,共4页Computers and Applied Chemistry

基　　金：国家自然科学基金(20777029);教育部博士点基金项目(200807100004);中央高校基本科研业务费专项资金(项目编号CHD2011JC094;CHD2012JC063)

摘　　要：用浊点法测定溴化N-乙基吡啶离子液体[Epy]Br-NaH_2PO_4-H_2O双水相体系在298.15 K下的双节线,同时测定该双水相体系的液液相平衡数据。采用Merchuk方程、Othmer-Tobias方程和Bancroft、Setschenowtype等方程对体系的双节线数据、液液相平衡数据进行了关联,结果较理想。同时绘制了该双水相体系的相图。得到的相平衡数据为[Epy]Br-NaH_2PO_4-H_2O双水相体系在物质萃取、分离、提纯方面的应用提供了理论依据。Binodal curves of the aqueous Brominated N-ethyl pyfidinc （[EPy]Br） ＋ Sodium dihydrogen phosphate （NaH2PO4） systems have been determined expcrimcntaUy at 298.15 K. And the liquid-liquid equilibrium （LLE） data were obtained by density determination .The Merchuk equation was used to correlate the binodal data of the investigated systems. The Othmer-Tobias, Bancroft and Setschcnowtype and several other empirical parameter equations were also used for the correlation of the binodal curve and the tie-line data for the investigated systems. A good accuracy was obtained with the experimental tie-line data with these models. At the same time the binodal experimental Phase diagram of the investigated systems was drawn. These data provide a theoretical basis for the extraction, separation and purification of phase composition when such data are not available.

关 键 词：[Epy]Br 双水相 液液相平衡 关联 

分 类 号：O614.123[理学—无机化学]