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过程工程学报 ›› 2018, Vol. 18 ›› Issue (3): 557-562.DOI: 10.12034/j.issn.1009-606X.217312

• 过程与工艺 • 上一篇    下一篇

HPP–Na2SO3–H2O双水相体系相平衡数据测定及关联

郑争志1,2, 刘雅婷1, 崔 鹏1*   

  1. 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
  • 收稿日期:2017-08-25 修回日期:2017-11-13 出版日期:2018-06-22 发布日期:2018-06-06
  • 通讯作者: 崔鹏
  • 基金资助:
    安徽省重点科技攻关项目

Measurement data and correlation of liquid-liquid equilibria for aqueous two-phase systems of HPP-Na2SO3-H2O

Zhengzhi ZHENG1,2, Yating LIU1, Peng CUI1*   

  1. 1. 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
  • Received:2017-08-25 Revised:2017-11-13 Online:2018-06-22 Published:2018-06-06
  • Contact: Peng CUI

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)哌嗪(HPP)–Na2SO3–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f213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

Abstract: The binodal and liquid?liquid equilibrium data of the 1,4-bis-(2-hydroxypropyl)-piperazine (HPP)–Na2SO3–H2O 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 liquid?liquid 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 liquid?liquid equilibrium relationship of HPP–Na2SO3–H2O. Except the effective excluded volume theory model neglecting volume fraction f213, 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, liquid-liquid equilibria, NRTL model