物理化学学报 >> 2005, Vol. 21 >> Issue (09): 1046-1049.doi: 10.3866/PKU.WHXB20050920

研究简报 上一篇    下一篇

RbNO3-C2H5OH-H2O三元体系的液-固相平衡及其性质

张军; 王献钊; 夏树屏; 高世扬   

  1. 河南科技大学化工与制药学院, 洛阳 471003; 许昌职业技术学院, 河南 许昌 461000; 中国科学院盐湖研究所二部, 西安 710043
  • 收稿日期:2005-01-18 修回日期:2005-03-24 发布日期:2005-09-15
  • 通讯作者: 张军 E-mail:zhjabc@mail.haust.edu.cn

The Liquid-Solid Equilibrium and Properties of RbNO3-C2H5OH-H2O Ternary System

ZHANG Jun; WANG Xian-zhao; XIA Shu-ping; GAO Shi-yang   

  1. Henan University of Science and Technology, Luoyang 471003; Xuchang Vocational and Technological College, Xuchang 461000; Xi’an Branch, Institute of Salt Lakes, Chinese Academy of Sciences, Xi’an 710043
  • Received:2005-01-18 Revised:2005-03-24 Published:2005-09-15
  • Contact: ZHANG Jun E-mail:zhjabc@mail.haust.edu.cn

摘要: 测定了RbNO3-C2H5OH-H2O 体系在25 ℃和50 ℃的等温平衡溶解度及饱和液的性质(密度和折光率). 绘制了相图, 计算了盐析率, 评价了盐析效果. 用经验公式分别对溶解度、密度和折光率进行了关联, 效果良好. 体系没有产生分层现象, 得到的平衡固相皆为无水铷盐, 没有新化合物或水合物生成.

关键词: 硝酸铷, 乙醇, 三元系, 相平衡, 溶解度, 折光率, 密度

Abstract: The isothermal solubility, density, and refractive index of the ternary system RbNO3-C2H5OH-H2O at 25 and 50 ℃ have been investigated using phase equilibrium. The compositions of the liquid and solid phases at equilibrium states were determined, and the phase diagrams were obtained. Three empirical formulae were used to correlate the solubility, density, and refractive index. No demixing phenomena were observed in the involved range of temperatures and compositions. The equilibrium solid phases at different temperatures were all simple rubidium nitrate. No new compounds were found.

Key words: Rubidium nitrate, Ethanol, Ternary system, Phase equilibrium, Solubility, Refractive index, Density