物理化学学报 >> 2007, Vol. 23 >> Issue (05): 695-700.doi: 10.3866/PKU.WHXB20070514

研究论文 上一篇    下一篇

RbBr/CsBr-CH3OH/C2H5OH-H2O三元体系的溶解度

赵文霞; 胡满成; 李淑妮; 蒋育澄; 张晓蕾; 胡蕾; 陈怀军   

  1. 陕西师范大学化学与材料科学学院, 西安 710062
  • 收稿日期:2006-10-24 修回日期:2006-12-07 发布日期:2007-04-28
  • 通讯作者: 胡满成 E-mail:hmch@snnu.edu.cn

The Solubility of Ternary SystemRbBr/CsBr-CH3OH/C2H5OH-H2O at Different Temperatures

ZHAO Wen-Xia; HU Man-Cheng; LI Shu-Ni; JIANG Yu-Cheng; ZHANG Xiao-Lei; HU Lei; CHEN Huai-Jun   

  1. School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an 710062, P. R. China
  • Received:2006-10-24 Revised:2006-12-07 Published:2007-04-28
  • Contact: HU Man-Cheng E-mail:hmch@snnu.edu.cn

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摘要： 采用自制的相平衡研究装置, 测定了RbBr-CH3OH/C2H5OH-H2O和CsBr-CH3OH/C2H5OH-H2O四个三元体系在25、35、45 ℃三个温度下的平衡溶解度;同时得到了四个三元体系饱和溶液中不同盐浓度下的折光率数据. 实验结果表明,在所有的体系中, 随着甲醇或乙醇质量分数的增加, RbBr和CsBr 在水中的溶解度逐渐降低; 并且折光率也逐渐减小. 用经验关联方程对溶解度进行了拟合, 同时给出了CH3OH 和C2H5OH 分别对RbBr和CsBr的盐析率曲线.

关键词: 溴化铷, 溴化铯, 甲醇, 乙醇, 溶解度, 折光率

Abstract: The solubilities of rubidium bromide and cesium bromide in water, water+ methanol, and water+ethanol were measured by using accurate analytical method at different temperatures. And refractive indices were determined for the two ternary systems in saturated solution with varied salt concentrations as well. In all cases, the presence of either methanol or ethanol significantly reduced the solubilities of rubidium bromide and cesium bromide in aqueous solution, but the refractive indices reduced with the increasing mass fraction of either methanol or ethanol. The solubilities of the saturated solutions were fitted via polynomial equations as a function of the mass fraction of methanol or ethanol, and the salting-out ratios of RbBr and CsBr by methanol and ethanol were also obtained.

Key words: Rubidiumbromide, Cesiumbromide, Methanol, Ethanol, Solubility, Refractive index