| 含钾水盐体系介稳相关系研究 |
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| 引用本文： | 彭芸,曾英,于旭东,张龙钦,吴祎,冯珊.含钾水盐体系介稳相关系研究[J].地质学报,2010,84(11):1697-1703. |
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| 作者姓名： | 彭芸 曾英 于旭东 张龙钦 吴祎 冯珊 |
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| 作者单位： | 成都理工大学材料与化学化工学院,成都,610059 |
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| 基金项目： | 国家自然科学基金(40673050)和新世纪优秀人才支持计划(NCET080900) |
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| 摘 要： | 针对西藏扎布耶盐湖卤水组成,采用等温蒸发法分别研究了含钾四元体系Na+,K+//Cl-,B4O27--H2O308.15K、五元体系K+//Cl-,CO23-,SO42-,B4O72--H2O273.15K下的介稳相关系。分别测定了上述体系308.15K、273.15K时介稳平衡液相组成及密度、pH值。根据实验数据绘制了相应的介稳相图、水图。结果表明,本文研究的两个体系均为简单共饱型,无复盐和固溶体生成。其中,四元体系介稳相图由2个共饱点,5条单变量曲线,4个结晶区组成。平衡固相分别为Na2B4O7.10H2O、K2B4O7.4H2O、NaCl和KCl。对比四元体系308.15K和273.15K下的介稳相图发现,平衡固相盐的种类及结晶形式均没有发生变化,但结晶区大小产生变化:在308.15K下,Na2B4O7.10H2O结晶区变小,K2B4O7.4H2O结晶区变大。五元体系投影图中有1个共饱点、3条单变量曲线和3个结晶相区。结晶相区分别为K2CO3.3/2H2O、K2SO4和KCl。K2CO3.3/2H2O结晶区面积最小,K2SO4结晶区面积最大。K2CO3对KCl有较强的盐析作用。
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| 关 键 词： | 介稳相平衡 钾 硼酸盐 溶解度 |
| 收稿时间： | 2010/8/22 0:00:00 |
| 修稿时间： | 2010/9/25 0:00:00 |
An Experimental Study on Metastable Phase Equilibrium of the Potassium Solid liquid System |
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| PENG Yun,ZENG Ying,YU Xudong,ZHANG Longqin,WU Yi and FENG Shan.An Experimental Study on Metastable Phase Equilibrium of the Potassium Solid liquid System[J].Acta Geologica Sinica,2010,84(11):1697-1703. |
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| Authors: | PENG Yun ZENG Ying YU Xudong ZHANG Longqin WU Yi and FENG Shan |
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| Institution: | College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059 |
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| Abstract: | In accordance with the composition of the Zabuye salt lake brine,Tibet,the metastable phase equilibrium of the quaternary system Na+,K+//Cl-,B4O2-7-H2O at 308.15 K and quinary system K+//Cl-,CO2-3,SO2-4,B4O2-7-H2O at 273.15 K were studied.Solubilities and physicochemical properties such as density and pH value of equilibrium solutions were determined at research temperature.On the basis of the experimental data,the metastable equilibrium phase diagram and the water diagram were plotted.The results show that... |
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| Keywords: | Metastable phase equilibrium Potassium Borate Solubility |
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