| 盐卤硼酸盐化学 ⅩⅪ.MgO-B_2O_3-MgCl_2(8％)-H_2O体系20℃热力学非平衡态液固相关系 |
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| 引用本文： | 姚占力,高世扬,夏树屏.盐卤硼酸盐化学 ⅩⅪ.MgO-B_2O_3-MgCl_2(8％)-H_2O体系20℃热力学非平衡态液固相关系[J].盐湖研究,1993(3). |
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| 作者姓名： | 姚占力 高世扬 夏树屏 |
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| 作者单位： | 中国科学院盐湖研究所，中国科学院盐湖研究所，中国科学院盐湖研究所 西宁 810008，西宁 810008，西宁 810008 |
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| 摘 要： | 用动力学方法对标题体系过饱和溶液的结晶过程进行了研究,MgO:B_2O_3(mol比)为1:2、1:5和1:7时的结晶固相分别为多水硼镁石、三方硼镁石和硼酸,与MgCl_2浓度为28％时的结果对比表明,MgCl_2浓度越低,该四元体系溶液过饱和度越小,因此,液固相关系也变得比较简单,在本文研究的浓度条件下出现了多水硼镁石固相,而MgCl_2浓度为28％时却没有,拟合出结晶动力学方程,对结晶机制进行了探讨。
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| 关 键 词： | 硼酸盐 结晶动力学 相图 |
Chemistry of Borate in Salt Lake Brine ⅩⅪ. A Study on Liquid-Solid Phase Diagram of Thermodynamic Non-equilibrium of the System MgO-B_2O_3-Mg+Cl_2 (8％)-H_2O at 20℃ |
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| Yao Zhanli,Gao Shiyang and Xia Shuping.Chemistry of Borate in Salt Lake Brine ⅩⅪ. A Study on Liquid-Solid Phase Diagram of Thermodynamic Non-equilibrium of the System MgO-B_2O_3-Mg+Cl_2 (8％)-H_2O at 20℃[J].Journal of Salt Lake Research,1993(3). |
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| Authors: | Yao Zhanli Gao Shiyang and Xia Shuping |
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| Abstract: | The crystallization processes of hydrated Mg-borates and boric acid from MgO-B_2O_3-MgCl_2 (8％)-H_2O supersaturated solutions at 20℃ have been studied by means of kinetic method. There are three solid phases in the system: 2MgO·3B_2O_3·15H_2O, MgO·3B_2O_3·7.5H_2O and H_3BO_3. The liquid-solid phase relationship of the system with the concentration of MgCl_2 being 8％ is simpler than that one with MgCl_2 being 28％. The kinetic equations of crystallization, of these compounds are fitted and the reaction mechanisms of crystallization are discussed. |
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| Keywords: | Borate Crystallization kinetics Phase diagram |
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