Determination of Solubility of Sodium Salts in Aqueous Surfactant and STPP Solutions Using an Ion Selective Electrode

被引：4

作者：

Wang, Xin ^{[1
]}

Zhang, Ya-Na ^{[1
,2
]}

Yu, Yang-Xin ^{[1
,3
]}

机构：

[1] Tsinghua Univ, Dept Chem Engn, Lab Chem Engn Thermodynam, Beijing 100084, Peoples R China

[2] Beijing Univ Chem Technol, Coll Chem Engn, Beijing 100029, Peoples R China

[3] Tsinghua Univ, State Key Lab Chem Engn, Beijing 100084, Peoples R China

来源：

JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2016年 / 61卷 / 07期

基金：

中国国家自然科学基金;

关键词：

MEAN SPHERICAL APPROXIMATION; EQUILIBRIUM; SYSTEMS;

D O I：

10.1021/acs.jced.5b00926

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Solubility of inorganic salts in the mixed systems containing surfactants and sodium tripolyphosphate (STPP) is very important for the production of laundry detergents. In this work we explored the solubility of NaCl, Na2SO4, and Na2CO3 in aqueous surfactant and STPP solutions using an ion selective electrode at 298.15 K. In the experiments, electromotive forces (EMF) for the ternary systems were measured using an ion-meter with a sodium ion selective composite electrode and the relationship between the solubility and EMF was analyzed by a potentiometric analysis. The proposed method has advantages in avoiding the solid liquid separation operation and solution supersaturation. The experimental results indicated that the salting-out effect caused by surfactant and STPP can decrease the solubility of sodium salts in the aqueous systems.

引用

页码：2236 / 2243

页数：8

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