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363.15 K时四元体系NaOH + Na₂CO₃ + Na₂SO₄ + H₂O、Na₂CO₃ + NaOH + NaCl + H₂O以及NaOH + Na₂SO₄ + NaCl + H₂O中的相平衡

Phase Equilibria in the Quaternary Systems NaOH + NaCO + NaSO + HO, NaCO + NaOH + NaCl + HO, and NaOH + NaSO + NaCl + HO at 363.15 K.

作者信息

Wu Jiangman, Liu Jinrong, Wu Zhaojun

机构信息

School of Chemical Engineering, Inner Mongolia University of Technology, Hohhot 010051, China.

出版信息

ACS Omega. 2020 Mar 9;5(10):4875-4889. doi: 10.1021/acsomega.9b03703. eCollection 2020 Mar 17.

DOI:10.1021/acsomega.9b03703
PMID:32201773
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7081322/
Abstract

The solid-liquid equilibrium data of the aqueous NaOH-NaCO-NaSO-HO, NaOH-NaCO-NaCl-HO, and NaOH-NaSO-NaCl-HO quaternary systems at 363.15 K were measured. The equilibrium solid phases and solubilities of salts in the three systems and its subsystems were determined. The densities of the saturated solutions were also determined. The experimental data are used to plot the solubility diagrams and water content diagrams of the systems. It was found that the NaOH-NaCO-NaSO-HO system contains the solid solution of γ-salt (NaSO·NaCO) and the other two systems NaCO-NaOH-NaCl-HO and NaOH-NaSO-NaCl-HO have the complex salts S1 (NaSO·NaOH) and S3 (NaSO·NaCl·NaOH). On the basis of Xu's activity coefficient model, a model was constructed for the correlation of solid-liquid equilibrium in electrolyte solutions to calculate the solubilities of salts in these systems at 363.15 K. The calculated solubilities are in agreement with the experimental values.

摘要

测定了NaOH-Na₂CO₃-Na₂SO₄-H₂O、NaOH-Na₂CO₃-NaCl-H₂O和NaOH-Na₂SO₄-NaCl-H₂O四元体系在363.15 K时的固液平衡数据。确定了这三个体系及其子体系中盐的平衡固相和溶解度。还测定了饱和溶液的密度。利用实验数据绘制了体系的溶解度图和含水量图。发现NaOH-Na₂CO₃-Na₂SO₄-H₂O体系含有γ-盐（Na₂SO₄·Na₂CO₃）的固溶体，另外两个体系Na₂CO₃-NaOH-NaCl-H₂O和NaOH-Na₂SO₄-NaCl-H₂O含有复盐S1（Na₂SO₄·NaOH）和S3（Na₂SO₄·NaCl·NaOH）。基于徐的活度系数模型，构建了一个用于关联电解质溶液固液平衡的模型，以计算这些体系在363.15 K时盐的溶解度。计算得到的溶解度与实验值相符。

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引用本文的文献

1
Solid-Liquid Phase Equilibria in the Quinary System NaCl + NaOH + NaCO + NaSO + HO at 363.15 K.五元体系NaCl + NaOH + Na₂CO₃ + Na₂SO₄ + H₂O在363.15 K时的固液相平衡
ACS Omega. 2020 Apr 21;5(17):10133-10144. doi: 10.1021/acsomega.0c00777. eCollection 2020 May 5.

本文引用的文献

1
Vapor-Liquid Equilibria Study of the LiCl + CaCl + HO System.LiCl + CaCl + H₂O体系的气液平衡研究
ACS Omega. 2019 Feb 28;4(2):4390-4396. doi: 10.1021/acsomega.8b03570.