CALCULATION OF SOLID-LIQUID EQUILIBRIA FOR MIXED AQUEOUS ELECTROLYTE SOLUTIONS

吉晓燕; 张吕正; 陆小华; 王延儒; 时钧

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CALCULATION OF SOLID-LIQUID EQUILIBRIA FOR MIXED AQUEOUS ELECTROLYTE SOLUTIONS

更新时间：2025-12-16

- CALCULATION OF SOLID-LIQUID EQUILIBRIA FOR MIXED AQUEOUS ELECTROLYTE SOLUTIONS
- CIESC Journal Issue 5, (1997)
- 作者机构：
  
  南京化工大学化学工程系,南京化工大学化学工程系,南京化工大学化学工程系,南京化工大学化学工程系,南京化工大学化学工程系南京 210009,南京 210009,南京 210009,南京 210009,南京,210009
- 作者简介：
- 基金信息：
- DOI：
  CLC： Q013
- Online First：25 October 1997，
  
  Published：25 October 1997
- 稿件说明：
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吉晓燕, 张吕正, 陆小华, et al. CALCULATION OF SOLID-LIQUID EQUILIBRIA FOR MIXED AQUEOUS ELECTROLYTE SOLUTIONS[J]. CIESC Journal, 1997, (5).
DOI：

吉晓燕, 张吕正, 陆小华, et al. CALCULATION OF SOLID-LIQUID EQUILIBRIA FOR MIXED AQUEOUS ELECTROLYTE SOLUTIONS[J]. CIESC Journal, 1997, (5). DOI：

摘要

用Lu-Maurer活度系数模型在不增加任何模型参数的前提下回归出18种晶体的溶度积

在此基础上预测了H~+、Mg~(2+)、K~+、Na~+、NH_4~+、Ca~(2+)、Cl~-、SO_4~(2-)、NO_3~-等离子所组合的13种体系在不同温度(最低温度为273.15 K

最高温度为378.15 K)及最高离子强度为34.55 mol·kg~(-1)下的固液平衡.预测结果较为满意.从而说明了该模型的良好普适性和可靠的温度外推性.可以为工业结晶过程提供相平衡的预测估计.

Abstract

In the present study the Lu-Maurer model (1993

1996)for aqueous electrolyte solutions was used to correlate solubility products Ksp of 18 salts including MgSO4

KCaCl3

NH4NO3

MgSO4·H2O

MgSO4·4H2O

MgSO4·5H2O

MgSO4·6H20

MgSO4·7H2O

CaCL2·2H2O

CaCL2-4H2O

CaCl2·6H2O

KMgCl3·6H2O

KaCaCl4·2H2O

CaMg2Cl6·12H2O

K2Mg2(SO4)3

K2Mg(SO4)2·2H2O

K2Mg(SO4)2·4H2O and K2Mg(SO4)2·6H2O. With no additional parameters this model was used to predict solubilities of 13 systems including MgCl2-CaCl2-H2O

KCl-HCl-H20

NaCl-HCl-H20

NH4Cl-HCl-H20

CaCl2-KCl-H20

MgCl2-KCl-H20

CaCl2-NaCl-H20

MgCl2-NaCl-H20

MgS04-K2S04-H20

NH4N03-NH4C1-H2o

NaNO3-NH4NO3-H2O

NaCl-KCl-MgCl2-H2O and NaCl-KCl-CaCl2-H2O in the temperature range from 273.15 K to 378.15 K. It was shown that this model is capable of predicting solubilities in mixed electrolyte aqueous solutions at elevated temperatures and up to very high ionic strength. It could be used to predict the composition of solid liquid phase equilibria for determining the technical conditions for the separation and manufacture of the interest inorganic salts.

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