高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (1): 18.

• 研究论文 • 上一篇    下一篇

硼酸盐化学(XXXI)MgO·2B2O3-18%MgSO4-H2O过饱和溶液结晶动力学研究

马玉涛1,3, 夏树屏1, 高世扬1,2   

  1. 1. 中国科学院盐湖研究所西安二部, 西安 710043;
    2. 陕西师范大学应用化学研究所, 西安 710062;
    3. 青海大学化学工程学院, 西宁 810016
  • 收稿日期:2000-12-28 出版日期:2002-01-24 发布日期:2002-01-24
  • 通讯作者: 高世扬(1931年出生),男,教授,博士生导师,中国科学院院士,从事成盐元素化学研究.
  • 基金资助:

    国家自然科学基金(批准号:29971032);青海省科学技术厅特殊基金资助

Chemistry of Borate(ⅩⅩⅩⅠ) Crystallization Kinetics of Mg-borates from MgO·2B2O3-18%MgSO4-H2O Supersaturated Solution

MA Yu-Tao1,3, XIA Shu-Ping1, GAO Shi-Yang1,2   

  1. 1. Xi'an Branch, Institute of Salt Lakes, Chinese Academy of Sciences, Xi'an 710043, China;
    2. Institute of App lied Chemistry, Shanxi Normal University, Xi'an 710062, China;
    3. College of Chemical Engineering, Qinghai University, Xining 810016, China
  • Received:2000-12-28 Online:2002-01-24 Published:2002-01-24

摘要: 针对我国盐湖硼资源的特点,模拟合成MgO·2B2O3-18%MgSO4-H2O过饱和溶液,分别在0℃和20℃恒温静止跟踪结晶动力学过程.拟合并给出结晶动力学方程,同时对结晶机制进行了探讨.析出固相采用X射线粉末衍射、红外光谱和热分析进行物相鉴定.

关键词: 硼酸盐, 过饱和溶液, 章氏硼镁石, 结晶动力学

Abstract: The supersaturated solution of MgO·2B2O3-18% MgSO4-H2O was prepared and then kept in the thermostat of (0±0.1) ℃ and (20±0.1) ℃, respectively. The crystallization processes of Mg-bo-rates from the solution have been studied by the kinetic method. The crystallization kinetic equations were fitted from the experimental data. The solid phases were identified by IR-spectra, X-ray powder diffraction and TG-DSC thermal analysis.

Key words: Borate, Supersaturated solution, Hungchaoite, Crystallization kinetics

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