大学化学 >> 2026, Vol. 41 >> Issue (9): 392-395.doi: 10.12461/PKU.DXHX202508086

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对三组分两对液体部分互溶相图的修正建议

宁文生1, 黄宗灏2, 张波1   

  1. 1 浙江工业大学化工学院, 浙江 德清 313299;
    2 浙江工业大学药学院, 浙江 德清 313299
  • 收稿日期:2025-08-25 录用日期:2025-09-30 发布日期:2026-09-01
  • 通讯作者: 宁文生 E-mail:ningwensheng@zjut.edu.cn Wensheng Ning

Proposed revisions to ternary phase diagrams featuring two pairs of partially miscible liquids

Wensheng Ning1, Zonghao Huang2, Bo Zhang1   

  1. 1 College of Chemical Engineering, Zhejiang University of Technology, Deqing 313299, Zhejiang Province, China;
    2 College of Pharmaceutical Science, Zhejiang University of Technology, Deqing 313299, Zhejiang Province, China
  • Received:2025-08-25 Accepted:2025-09-30 Published:2026-09-01
  • Contact: Wensheng Ning E-mail:ningwensheng@zjut.edu.cn

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摘要： 一些《物理化学》教材在介绍三组分两对液体部分互溶相图时，采用的是“乙烯腈-水-乙醇”三组分系统，存在着“乙烯腈”是否存在、温度降低时相图是否反映了溶解度变化特征的疑问。解决这两个疑问的关键是相关教材应给出“乙烯腈”的学名和分子结构式，以能准确获取这种有机化合物，方便学生进行相图测试工作。

关键词: 三组分相图, 液体部分互溶, 乙烯腈, 温度影响

Abstract: Numerous Physical Chemistry textbooks employ the ethylene nitrile-water-ethanol system to illustrate ternary phase diagrams with two pairs of partially miscible liquids. However, two significant concerns have emerged: first, regarding the actual existence of the compound termed “ethylene nitrile”, and second, whether the phase diagrams accurately represent the characteristic solubility changes with decreasing temperature. Since phase diagrams are constructed based on experimental data, it is essential to provide the systematic nomenclature and molecular structure of “ethylene nitrile” to ensure the correct compound can be obtained for experimental verification. The accuracy of phase diagrams directly impacts their reliability in practical applications, thus warranting careful examination of discrepancies among diagrams presented in different textbooks.

Key words: Ternary phase diagrams, Partially miscible liquids, Ethylene nitrile, Temperature effect