醇胺类离子液体分离异丙醇-水的等压气液相平衡  

Isobaric Vapor-Liquid Equilibrium for the Isopropanol-Water System Containing Ionic Liquids

作　　者：张志刚 李月 张亲亲 许红红 张爱笛 李文秀 张弢 ZHANG Zhi-gang;LI Yue;ZHANG Qin-qin;XU Hong-hong;ZHANG Ai-di;LI Wen-xiu;ZHANG Tao(Shenyang University of Chemical Technology,Shenyang 110142,China)

机构地区：[1]沈阳化工大学化学工程学院,辽宁沈阳110142

出　　处：《沈阳化工大学学报》2018年第1期30-34,共5页Journal of Shenyang University of Chemical Technology

基　　金：国家自然科学基金资助项目(21076126)

摘　　要：在101.3k Pa下,测定了含有二乙醇胺乳酸盐([DEA][Lc])和三乙醇胺乳酸盐([TEA][Lc])的异丙醇-水-离子液体三元物系的等压气液相平衡数据.测试结果显示:这两种离子液体的加入均能产生盐析效应;离子液体浓度越大,异丙醇对水的相对挥发度越大,离子液体[TEA][Lc]在摩尔分数为0.1时可完全打破共沸,离子液体[DEA][Lc]的摩尔分数为0.2时可完全打破共沸.用NRTL模型关联实验数据,关联值与实验值基本一致.Isobaric vapor-liquid equilibrium(VLE)data were measured at atmospheric pressure(101.3 kPa)for the isopropanol(1)+water(2)system containing ionic liquids(ILs),namely lactic acid salt diethanolamine(DEA][[Lc])and lactic acid triethanolamine salt([TEA][Lc]).The experimental results showed that the addition of two kinds of ionic liquids can produce a salting-out effect on isopropanol+water system,and enhance the relative volatility of isopropanol to water.When the mole fraction of[TEA][Lc]was 0.1 the azeotropy could be broken,while the mole fraction of[DEA][Lc]needed to break the azeotropy is 0.2.The ternary vapor-liquid equilibrium experimental data were fitted with the nonrandom two-liquid(NRTL)model.It was demonstrated that the NRTL model was suitable for the description of the ternary system of isopropanol+water+ILs.

关 键 词：异丙醇 水 离子液体 气液相平衡 

分 类 号：TQ028.32[化学工程]