高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (5): 757.

• 论文 • 上一篇    下一篇

五元体系K22+,Mg2+//Cl22-,SO42--CO(NH2)2-H2O及其边界四元体系MgSO4-MgCl2-CO(NH2)2-H2O在25℃时的等温溶度研究

张逢星, 魏小兰, 李珺   

  1. 西北大学化学系, 西安 710069
  • 收稿日期:2002-07-09 出版日期:2003-05-24 发布日期:2003-05-24
  • 通讯作者: 张逢星(1954年出生),男,教授,博士生导师,主要从事物理无机化学和功能配合物研究.E-mail:zhangfx@nwu.edu.cn E-mail:zhangfx@nwu.edu.cn
  • 基金资助:

    陕西省教育委员会科研基金

Studies on the Isothermal Solubility for Quinary System K22+,Mg2+//Cl22-,SO42--CO(NH2)2-H2O and Its Boundary System MgSO4-MgCl2-CO(NH2)2-H2O at 25℃

ZHANG Feng-Xing, WEI Xiao-Lan, LI Jun   

  1. Department of Chemistry, Northwest University, Xi'an 710069, China
  • Received:2002-07-09 Online:2003-05-24 Published:2003-05-24

摘要: 报道了五元体系K22+,Mg2+//Cl22-,SO42--CO(NH2)2-H2O在脲不饱和区及其边界四元体系MgSo4-MgCl2-CO(NH2)2-H2O在25℃时的等温溶度研究结果,绘制了体系等温溶度的盐分组成图、水量图以及饱和溶液的折光率-组成图.五元体系在脲的参与下,交互反应K2Cl2+MgSO4→K2SO4+MgCl2向有利于生成硫酸钾和软钾镁矾K2SO4·MgSO4·6H2O(pic.)的方向进行,这两者的相区较无脲时明显增大.

关键词: 相平衡, 溶度图, 氯化钾, 硫酸钾, 氯化镁, 硫酸镁,

Abstract: The isothermal solubility for quinary system K22+,Mg2+//Cl22-,SO42--CO(NH2)2-H2Oand its boundary system MgSO4-MgCl2-CO(NH2)2-H2O at 25 ℃ have been determined. The solubility diagrams of the system have been drawn. The results showed that the presence of urea in the system is in favor of the process of the reaction K2Cl2+MgSO4→K2SO4+MgCl2.

Key words: Phase equilibrium, Solubility diagram, Potassium chloride, Potassium sulfate, Magnesium chloride, Magnesium sulfate, Urea

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