大学化学 >> 2018, Vol. 33 >> Issue (10): 85-90.doi: 10.3866/PKU.DXHX201801046

化学实验 上一篇    下一篇

环己烷-乙醇气液平衡体系相图绘制实验中的分馏效应及改进方法

郑欧*(),张栢茂,祝淑颖,黄长沧,吴舒婷,李浩宏*()   

  • 收稿日期:2018-01-31 发布日期:2018-11-01
  • 通讯作者: 郑欧,李浩宏 E-mail:zhengouou@163.com;lihh@fzu.edu.cn
  • 基金资助:
    福州大学高等教育教学改革工程项目(50010864);福州大学本科生科研训练项目(24046);福州大学一流本科教育改革项目(003698)

Fractionation Effect and Method Improvement in the Experiment of Vapor-Liquid Equilibrium Phase Diagram of Cyclohexane-Ethanol System

Ou ZHENG*(),Baimao ZHANG,Shuying ZHU,Changcang HUANG,Shuting WU,Haohong LI*()   

  • Received:2018-01-31 Published:2018-11-01
  • Contact: Ou ZHENG,Haohong LI E-mail:zhengouou@163.com;lihh@fzu.edu.cn
  • Supported by:
    福州大学高等教育教学改革工程项目(50010864);福州大学本科生科研训练项目(24046);福州大学一流本科教育改革项目(003698)

摘要:

考查了环己烷-乙醇气液体系建立平衡需要的加热时间和平衡时气相中的温度分布情况,以及自制保温隔热套对这两者的影响。实验表明,给玻璃沸点仪套上保温隔热套能缩短建立气液平衡需要的加热时间,减少蒸馏瓶内气相的温度分布梯度和分馏效应,确保绘制的相图更准确。

关键词: 物理化学, 气液相图绘制, 分馏效应

Abstract:

In this paper, the heating time and temperature distribution in the cyclohexane-ethanol vapor-liquid equilibrium system are investigated, and the influence of a thermal insulation cover has also been investigated. The experimental results show that the thermal insulation cover can shorten the heating time for the system to reach the vapor-liquid equilibrium, and reduce the temperature distribution gradient and the fractionation effect of the vapor phase in the distillation flask, thus, a more accurate phase diagram can be obtained.

Key words: Physical chemistry, Vapor-liquid phase diagram plotting, Fractionation effect

MSC2000: 

  • G64