| 含锂、钾硼酸盐水溶液体系固液相平衡研究 |
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| 引用本文： | 史春成,杨娟,王士强,赵冬,郭亚飞,邓天龙.含锂、钾硼酸盐水溶液体系固液相平衡研究[J].盐湖研究,2019,27(1). |
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| 作者姓名： | 史春成 杨娟 王士强 赵冬 郭亚飞 邓天龙 |
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| 作者单位： | 天津科技大学海洋与环境学院,天津科技大学海洋与环境学院,天津科技大学海洋与环境学院,天津科技大学海洋与环境学院,天津科技大学海洋与环境学院,天津科技大学海洋与环境学院 |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘 要： | 采用等温溶解平衡法测定了含锂、硼硼酸盐水溶液体系在35℃时的溶解度、密度和折光率，根据实验数据，绘制了相应的溶解度图、密度图、折光率图和pH值图。该体系溶解度相图包含一个共饱点，两个单盐结晶区，分别为结晶相区较大的（L+ Mg2B6O11·15H2O）和结晶相区较小的（L + K2B4O7·4H2O），溶液体系中没有固溶体和复盐产生。溶液的密度、折光率和pH值随着硼酸钾溶液的浓度增大而呈现与规律的变化，并采用半经验公式对溶液的密度和折光率进行计算，计算值和实验值吻合较好。
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| 关 键 词： | 稳定相平衡，相图，溶解度，物化性质 |
| 收稿时间： | 2019/3/29 0:00:00 |
| 修稿时间： | 2019/4/9 0:00:00 |
Solid-Liquid Phase Equilibria in the Aqueous System Containing Potassium, Magnesium, and Borate at 308.15 K |
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| Chuncheng Shi,Juan Yang,Shiqiang Wang,Dong Zhao,Yafei Guo and Tianlong Deng.Solid-Liquid Phase Equilibria in the Aqueous System Containing Potassium, Magnesium, and Borate at 308.15 K[J].Journal of Salt Lake Research,2019,27(1). |
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| Authors: | Chuncheng Shi Juan Yang Shiqiang Wang Dong Zhao Yafei Guo and Tianlong Deng |
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| Affiliation: | College of Marine and Environmental Sciences,Tianjin University of Science and Technology,Tianjin,College of Marine and Environmental Sciences,Tianjin University of Science and Technology,Tianjin,College of Marine and Environmental Sciences,Tianjin University of Science and Technology,Tianjin,College of Marine and Environmental Sciences,Tianjin University of Science and Technology,Tianjin,College of Marine and Environmental Sciences,Tianjin University of Science and Technology,Tianjin,College of Marine and Environmental Sciences,Tianjin University of Science and Technology,Tianjin,;China;Tianjin Key Laboratory of Marine Resources and Chemistry,Tianjin,;China |
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| Abstract: | Experimental studies on the solubility, density, refractive index and pH value in the aqueous system containing potassium, magnesium, and borate at 308.15 K were determined with the method of isothermal dissolution equilibrium. Based on the experimental results, the diagrams of solubility, density, refractive index and pH value in this system were plotted. It was found that there are one eutectic point and two crystallization regions corresponding to the large area of inderite (L + Mg2B6O11.15H2O) and the relative small area of potassium borate tetrahydrate (L + K2B4O7.4H2O), respectively. Neither double salt nor solid solution was found in this system. The physicochemical properties (density, refractive index and pH value) in solution at 308.15 K change regularly with the increasing of potassium borate concentration. The calculated values of density and refractive index using empirical equations of the aqueous system are in good agreement with the experimental values. |
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| Keywords: | Stable phase equilibrium Phase diagram Solubility Physicochemical property |
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