高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (8): 841.

• 研究论文 • 上一篇    下一篇

含盐体系汽液平衡的测定方法和测定仪器的研究

周星风, 潘焕泉, 兰贵全, 韩世钧   

  1. 浙江大学化学系
  • 收稿日期:1988-01-09 出版日期:1989-08-24 发布日期:1989-08-24
  • 通讯作者: 韩世钧

Study on Determination Method and Apparatus for Salt-Containing Vapor Liquid Equilibria

Zhou Xingfeng, Pan Huanquan, Lan Guiquan, Han Shijun   

  1. Department of Chemistry, Zhe Jiang University, Hangzhou
  • Received:1988-01-09 Online:1989-08-24 Published:1989-08-24

摘要: 针对含盐体系汽液平衡测定的特点及常用测定仪器和方法中的问题,改制了具有沸点仪和双循环平衡釜双重功能CS-Ⅱ型VLE测定仪,并以拟静态法测定了含盐体系汽液平衡的泡点线和平衡液相恒盐浓度下的露点线.新测定仪能避免用双循环仪器时极易出现的流动不稳定性和爆沸现象.成功地测定了氯化钙平衡液相浓度为5%的CaCl2-丙酮(1)-甲醇(2)体系的汽液平衡数据.

关键词: 含盐体系汽液平衡, 拟静态法, 多功能汽液平衡仪, 泡点线, 露点线

Abstract: A New method, based on dynamic method of double phase circulation for measurement of vapor liquid equilibrium data of salt-containing system, is present,and a new apparatus developed.To solve the problems existing in the common determination method for salt-containing vapor liquid equilibrium, our work is based on the principle of double phase circulation method and the determination procedure is divided into two steps.In the first step, the quasi-static method is used to measure the bubble point line data (t,x) which does not require composition analysis,and in the second step, by using the same apparatus CS- Ⅱ multipurpose VLEdetermination apparatus, the dew point line data (t, y) of the same constant salt concentration in equilibrium liquid phase is determined.The new VLBdetermination apparatus with a pump-like stirrer can make the circulation so steady that it can avoid effectively the fluctuation and the rush of the liquid flow which often happens when double phase circulation apparatus are used for salt-containing systems.The error equation of quasi-static method for the bouble point measurement of salt-containing system is deduced from the relationship of material balance concerned,the verification work was done experimentally, including the examination of the applicability of the new apparatus in saturated salt-containing system and the determination of VLEdata of CaCl2-acetone(1)-methanol(2) system at normal pressure and 5% CaCl2 concentration in equilibrium liquid phase.The experimental data agree finely with literature data.

Key words: Salt-containing vapor liquid equilibrium, Quasi-static method, Multipurpose VLE determination apparatus, Bubble point line, Dew point line

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