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化学学报
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化学学报 ›› 1991, Vol. 49 ›› Issue (2): 128-134. 上一篇    下一篇

研究论文

15℃KCl-NaCl-MgCl~2-H~2O四元体系相平衡研究

何贤江;郭志琴;苏裕光   

  1. 成都科学技术大学化学工程系
  • 发布日期:1991-02-15

A study on the phase equilibrium of the KCl-NaCl-MgCl~2-H~2O quaternary system at 15℃

HE XIANJIANG;GUO ZHIQIN;SU YUGUANG   

  • Published:1991-02-15

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本文测定了15℃(±0.01℃)时KCl-NaCl-MgCl~2-H~2O四元体系的溶解度数据,得出了完整的相图, 补齐了现有文献所缺的溶解度数据。本文用从几个方向趋近的方法测定了共饱点数据, 并有用数理统计方法对数据进行了处理, 结果可靠。用Pitzer方程式对该四元体系的溶解度数据进行了计算。计算所需的所有参数由所测的三元体系及部分四元体系数据用最小二乘法进行最优化, 计算值与实验值吻合得很好。

关键词: 相平衡, 水, 溶解度, 四元系, 氯化钠, 氯化钾, 氯化镁, 最佳化, 最小二乘法, 数理统计

Solubilities at 15癈 for KCl-NaCl-MgCl2-H2O quaternary system were measured systematically and tabulated. The crystallization regions of KCl, NaCl, MgCl2.6 H2O and KCl.MgCl2.6H2O were found in the quaternary phase diagram. The Pitzer's equations for electrolyte solns. was used to predict the system. All parameters used for calculation were evaluated by the method of least squares. Also, the solubilities at 15癈 for the system KCl-NaCl-MgCl2-H2O were calculated by means of the parameters. The calculated values agree with that measured within experimental error.

Key words: PHASE EQUILIBRIUM, WATER, SOLUBILITY, QUATERNARY SYSTEM, SODIUM CHLORIDE, POTASSIUM CHLORIDE, MAGNESIUM CHLORIDE, OPTIMIZATION, LEAST SQUARE METHODS, MATHEMATICAL STATISTICS

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