| 硼酸溶液中氯柱硼镁石的溶解及相转化动力学 |
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| 引用本文： | 李小平,刘志宏,高世扬,胡满成,夏树屏.硼酸溶液中氯柱硼镁石的溶解及相转化动力学[J].物理化学学报,2003,19(7):584-587. |
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| 作者姓名： | 李小平 刘志宏 高世扬 胡满成 夏树屏 |
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| 作者单位： | 1.Shool of Chemistry and Materials Science, Shaanxi Normal University, Xi’an 710062;2.The Second Part of Institue of Salt Lake, Chinese Academy of Sciences, Xi’an 710043 |
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| 基金项目： | 国家自然科学基金(29971032)资助项目~~ |
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| 摘 要： | 对氯柱硼镁石（2MgO?2B2O3?MgCl2?14H2O）在4.5％H3BO3水溶液40 ℃的溶解及相转化过程进行了动力学研究.对不同时间取出的液相的化学分析及不同阶段分离固相的鉴定结果表明,该复盐在溶解阶段出现与前所报导不同的同步溶解，最终产物是库水硼镁石（2MgO?3B2O3?15H2O）.提出了库水硼镁石的形成条件和溶解及相转化动力学机理，利用单纯形优化法配合Runge-Kutta微分方程组数值解法对实验数据进行处理，给出了转化结晶动力学方程.
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| 关 键 词： | 硼酸盐化学 氯柱硼镁石 动力学 溶解及相转化 库水硼镁石 |
| 收稿时间： | 2002-10-07 |
| 修稿时间： | 2002年10月7日 |
Kinetics of Dissolution and Transformation of Chloropinnoite in H3BO3 Aqueous Solution |
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| Li Xiao Ping Liu Zhi Hong Gao Shi Yang , Hu Man Cheng Xia Shu Ping.Kinetics of Dissolution and Transformation of Chloropinnoite in H3BO3 Aqueous Solution[J].Acta Physico-Chimica Sinica,2003,19(7):584-587. |
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| Authors: | Li Xiao Ping Liu Zhi Hong Gao Shi Yang Hu Man Cheng Xia Shu Ping |
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| Institution: | 1.Shool of Chemistry and Materials Science, Shaanxi Normal University, Xi’an 710062;2.The Second Part of Institue of Salt Lake, Chinese Academy of Sciences, Xi’an 710043 |
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| Abstract: | The kinetics of dissolution and transformation processes of 2MgO?2B2O3?MgCl2?14H2O in 4.5％ H3BO3 aqueous solution at 40 ℃ was studied. The liquid samples were taken at different times for chemical analysis. And the solid phase at different stages was separated and identified. The experimental results showed that 2MgO?2B2O3?MgCl2?14H2O dissolved congruently in 4.5％ H3BO3 aqueous solution, which was different from the process of the dissolution of 2MgO?2B2O3?MgCl2?14H2O in water. The final crystal solid phase was kurnakovite(2MgO?3B2O3?15H2O). The kinetic equations of the crystallization reaction were given with the aid of Simplex Optimum Method and Runge-Kutta digital solution of differential equation system, a mechanism of dissolution and transformation and the formation condition of kurnakovite in Qinghai-Tibetan plateau were proposed and discussed. |
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| Keywords: | Borochemistry Chloropinnoite Kinetics Dissolution and transformation Kurnakorite |
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