高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (6): 1378.

• 研究论文 • 上一篇    下一篇

25  ℃下Na+, K+, Mg2+//Cl-, SO2-4, NO-3, H2O体系液固相平衡

黄雪莉,  王雪枫, 陈丽娟   

  1. 新疆大学化学化工学院,  乌鲁木齐  830046
  • 收稿日期:2010-07-05 修回日期:2010-10-13 出版日期:2011-06-10 发布日期:2011-05-10
  • 通讯作者: 黄雪莉 E-mail:xuelih@sohu.com
  • 基金资助:

    国家自然科学基金(批准号:   20466003,   20866008)和新疆大学博士启动基金项目资助.

Liquid-Solid Equilibrium of Na+, K+, Mg2+//Cl-, SO2-4, NO-3, H2O System at 25 ℃

HUANG Xue-Li*, WANG Xue-Feng, CHEN Li-Juan   

  1. College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi  830046, China
  • Received:2010-07-05 Revised:2010-10-13 Online:2011-06-10 Published:2011-05-10
  • Contact: HUANG Xue-Li E-mail:xuelih@sohu.com
  • Supported by:

    国家自然科学基金(批准号:   20466003,   20866008)和新疆大学博士启动基金项目资助.

摘要: 本文应用等温溶解平衡法,研究了Na+, K+, Mg2+//Cl-, SO42-, NO3-, H2O六元体系在25℃、氯化钠饱和时的相平衡关系,测定了溶解度数据,并绘制出相应的相图. 研究表明: 25℃时,该体系在氯化钠饱和的区域里存在8种复盐,有15个两盐结晶区,25个零变量点;零变量点中只有一个共结点,为Mg(NO3)2?6H2O、NaCl、MgCl2?6H2O、MgSO4?(1~6)H2O、KCl?MgCl2?6H2O五盐共饱点,其余为反应点. 在此基础上,研究了新疆硝酸盐卤水矿蒸发析盐规律.

关键词: 硝酸盐, 相图, 六元体系, 新疆

Abstract: In this work, the liquid-solid equilibrium for the Na+, K+, Mg2+//Cl-, SO42-, NO3-, H2O system,to which the nitrate brine in Xinjiang in China belongs, is investigated for the first time; The solubilities in phase equilibrium of this system have been measured by isothermal method, and according to experimental data, the phase diagram was plotted. The results show: when saturated with NaCl and at 25℃, in this system, there are 8 double salt, 15 regions saturated with two salts, and 25 invariant points, one of which is an incongruent point saturated with Mg(NO3)2?6H2O、NaCl、MgCl2?6H2O、MgSO4?(1~6)H2O、KCl?MgCl2?6H2O, and others are reaction points. Based on these works, the sequence of crystallization of salts from the brine during evaporation process was discussed.

Key words: Salt nitrate, Phase diagram, Six-component system, Xinjiang

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