第18卷第3期 2018年6月
过程与工艺 a
E
过程工程学报
The Chinese Journal of Process Engineering
Vol.18 No.3 June2018
DOl: 10.12034/j.issn.1009-606X.217312
HPP-Na2SO3-H2O双水相体系相平衡数据测定及关联
郑争志"2，刘雅婷"，崔鹏！
(1.合肥工业大学化学与化工学院，可控化学与材料化工安徽省重点实验室，安徽合肥230009；2.安徽大学化学化工学院，安徽合肥230601）摘要：采用浊点法和相组分分析法测定了不同温度下N,N-二(2-羟丙基)眼嗪(HPP)-Na2SO;-H2O双水相体系的双节线和相平衡数据，并分别采用多项式、经验方程、有效体积排除法模型和NRTL模型对双节线数据和相平衡数据进行了关联.结果表明，经验方程对双节线数据关联的吻合度高于多项式方程和有效体积排除法模型，且NRTL模型能很好关联该双水相相平衡数据.除
忽略可填充体积分数i13的有效体积排除法模型外，其余方程和模型的关联参数均能满足实际计算和工程应用关键词：N,N'-二(2-羟丙基)哌嗪：双水相：双节线数据：液液相平衡：NRTL模型
中图分类号：TQ013.1
文献标识码：A
文章编号：1009606X(2018)030557-06
Measurement Data and Correlation of LiquidLiquid Equilibria for Aqueous
Two-phase Systems of HPP-Na2SO3-H2O Zhengzhi ZHENGI2,Yating LIU', Peng CUI"
(I. School of Chemistry & Chemical Engineering, Anhui Key Laboratory of Controllable Chemistry Reaction & Material Chemical
Engineering,Hefei University of Technology, Hefei, Anhui 230009, China;
2. School of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, China)
Abstract: The binodal and liquidliquid equilibrium data of the 1,4-bis-(2-hydroxypropyl)-piperazine (HPP)NazSOH2O system at different temperatures were determined by cloud point method and phase component analysis method respectively. The binodal data were fitted by polynomial equation, empirical equations and effective excluded volume theory models respectively and the liquidliquid equilibrium data were fitted by NRTL model. The results showed that empirical equations can provide better correlations for the binodal data than the polynomial equation and the effective excluded volume theory ones, and the NRTL model was suitable for the liquidliquid cquilibrium relationship of HPPNazSOH2O. Except the effective excluded volume theory model neglecting volume fraction fas, the parameters of equations and models were consistent with the actual calculation and engineering application requirements.
Key words: 1, 4-bis-(2-hydroxypropyl)-piperazine; aqueous two-phase system; binodal data; liquidliquid equilibria; NRTL model
1前言
双水相体系分离萃取作为一种新型分离技术，具有设备投资费用少、体系含水量高、不使用有机溶剂、操作简单、易放大可快速进入工业生产阶段等优点112，双水相体系高效温和，不易引起生物活性物质变性失活，近几年国内外科研人员将其用于细胞器[3]、蛋白质与 DNA[45]、金属离子[6]、有机物[7,8]等的分离提纯
N,N"-二(2-羟丙基)哌嗪(HPP)为小分子有机化合物，是一种新型有机胺可再生脱硫剂[9]，急性毒性试验表明属低毒类，与目前研究较多的聚乙二醇形成的双
收稿日期：20170825，修回日期：2017-11-13
基金项目：安徽省重点科技攻关项目(编号：08010202124)
水相相比，HPP与盐形成的双水相粘度更低(9,10]，有利于分离过程的扩散和传质.Na2SO;或NaHSO,形成的双水相在食品工业分离中受到关注(11-13],HPP与Na2SO 形成的双水相pH值约为10，适用于在弱碱性条件下稳定物质的萃取与分离
HPP吸收剂吸收解吸SO2气体过程中，烟气灰尘引入的SO.2，NO,，CI-和K*等离子会随吸收剂循环次数增加而累积甚至结晶，影响吸收剂的效果和寿命， HPP-Na2SO;-H2O双水相体系可有效分离杂质离子且不引入新杂质.研究双水相体系双节线及液液相平衡可获得双水相形成的浓度及上下相的平衡组成，对双水相
作者简介：郑争惠(1984-)，女，河北省东光县人，博士研究生，材料化学工程专业；崔鹏，通讯联系人，E-mail:cuipeng@hfut.edu.cn 引用格式：郑争志，刘雅婷，张期.HPP-NaS0,-H:0双水相体系相平衡数据测定及关联。过程工程学报，2018,18(3)：557-562
ZhengZZ, LiuYT, CuiP Measurement Data and Corelation ofLiquidLiquid Equilibria for Aqueous Twophase Systems of HPP-Na:S0,H;O (in Chinese),Chin.J.Process Eng,2018, 18(3):557562, DOI:10.12034/j.issn.1009-606X.217312.
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