物理化学学报 >> 1987, Vol. 3 >> Issue (05): 520-524.doi: 10.3866/PKU.WHXB19870514

研究论文 上一篇    下一篇

等温气液平衡盐效应的研究——有机溶剂-水-无机盐体系

魏冬青; 卢锦梭; 朱建军; 周西顺   

  1. 河南师范大学化学系
  • 收稿日期:1987-02-21 修回日期:1987-03-30 发布日期:1987-10-15

THE STUDIES ON SALT EFFECT OF THE ISOTHERMAL VAPOUR-LIQUID EQUILIBRIUM——ORGANIC SOLVENT-WATER-INORGANIC SALT SYSTEM

Wei Dongqing; Lu Jinsuo; Zhu Jianjun; Zhou Xishun   

  1. Department of Chemistry; Normal University of Henan
  • Received:1987-02-21 Revised:1987-03-30 Published:1987-10-15

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摘要： 本文报导了甲醇-水-氯化锂、乙醇-水-氯化锂、丙酮-水-氯化锂和丙酮-水-碳酸钾体系在298.15 K时的等温气液平衡数据, 以及用三参数Margules公式的关联结果。提出了由等温气液平衡数据计算混合溶剂中盐的溶剂化数的理论公式。

Abstract: Nomatter for its industrial usefulness or theoretical importance as a very con- vient way to study thermodynamic behavior of the salt in a binary solution, the gas-liquid equilibrium data of tenary system with salt as one of components are of values. Actually a lot of isobaric data has been collected, however the isothermal data are very few. In this paper the isothermal data of CH_3OH-H_2O-LiCl, C_2H_5OH- H_2O-LiCl, CH_3COCH_3-H_2O-LiCl and CH_3COCH_8-H_2O-K_2CO_3 systems has been repor- ted and used to discuss the salt solvation. The equipment was designed by ourselves which the acuracy istested by measuring the data of corresponding binary systems without salt, the results proves to be quite satifactory.
We correlated the data using the three parameter Margules formula, where the parameters are determined by Barker′s method. It is desired that one can get the solvated properties from the gas-liquid equilibrium data, Ohe was the first one who proposed a formulism to get the prefer solvated numbers from the gas-liquid data. However for many organic-water-salt system, the solvated numbers from Ohe′s theory is negative in some region. We developed a similar theory for the isothermal data, the calculated solvated numbers are reasonable.