高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (2): 186.

• 论文 • 上一篇    下一篇

2MgO·2B2O3·MgCl2·14H2O在60℃水中的溶解及相转化动力学研究

刘志宏1, 夏树屏2, 高世扬2   

  1. 1. 陕西师范大学化学系, 西安 710062;
    2. 中国科学院盐湖研究所二部, 西安 710043
  • 收稿日期:1998-02-25 出版日期:1999-02-24 发布日期:1999-02-24
  • 通讯作者: 刘志宏,男,35岁,硕士,讲师.
  • 基金资助:

    国家自然科学基金

Studies on the Kinetics of Dissolution and Transformation of 2MgO2·B2O3·MgCl21·4H2O in Water at 60

LIU Zhi-Hong1, XIA Shu-Ping2, GAO Shi-Yang2   

  1. 1. Department of Chemistry, Shaanxi Normal University, Xi'an, 710062;
    2. The Second Part of Institute of Salt Lake, Academia Sinica, Xi'an, 710043
  • Received:1998-02-25 Online:1999-02-24 Published:1999-02-24

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摘要： 用动力学方法研究了2MgO·2B2O3·MgCl2·14H2O在60℃水中的溶解及相转化过程.通过对不同时间取出液相的化学分析及不同阶段分离出固相所作鉴定结果表明:该复盐呈不同步溶解,中间产物是MgO·B2O3·4H2O和Mg(OH)2,最终转化产物是柱硼镁石(MgO·B2O3·3H2O).提出了溶解及相转化机理,给出了溶解和转化结晶动力学方程.

关键词: 氯柱硼镁石, 溶解及相转化, 动力学, 柱硼镁石

Abstract: The kinetic of dissolution and transformation process of 2MgO·2B2O3·MgCl2·14H2O in water at 60 was studied. The solution samples were taken at different time for chemical analysis.The solid phase at different stages was separated and identified.The experimental results show that 2MgO2·B2O3·MgCl2·14H2O dissolved incongruently in water. The midproduct is MgO·B2O3·4H2O and Mg(OH)2.The finaLInversion product is pinnoite, MgO·B2O3·3H2O. The mechanism of dissolution and transformation was proposed and discussed. The kinetic equations of dissolution and crystallization were obtained.

Key words: Chloropinnoite, Dissolution and transformation, Kinetics, Pinnoite

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