高等学校化学学报

高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (9): 1201.

• 研究论文 • 上一篇    下一篇

LiCl-HOAc和LiCl-HOAc-H2O体系(25℃)相图

冉新权, 钦帆, 袁民政   

  1. 西北大学化学系, 西安 710069
  • 收稿日期:1993-01-11 修回日期:1993-04-12 出版日期:1993-09-24 发布日期:1993-09-24
  • 通讯作者: 冉新权
  • 作者简介:第一作者:男, 49岁, 副教授.

Phase Diagram of LiCl-HOAc and LiCl-HOAc-H2O(at25℃) Systems

RAN Xin-Quan, QIN Fan, YUAN Min-Zheng   

  1. Department of Chemistry, Northwestern University, Xi' an, 710069
  • Received:1993-01-11 Revised:1993-04-12 Online:1993-09-24 Published:1993-09-24

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摘要： 测定了LiCl-HOAc和LiCl-HOAc-H2O体系25℃时的溶度,绘制了溶度图.在LiCl-HOAc体系的相图中有LiCl及LiCl·1/2HOAc2种固相,后者是固液异成分化合物,体系中未发现LiCl·5HOAc或LiCL·HOAc的生成.LiCl-HOAc-H2O体系25℃时的相图中有3种固相,即LiCl·H2O、LiCl和LiCl·(1/2)HOAc.相变LiCl·H2O→LiCl→LiCl·(1/2)HOAc表明HOAc在该三元体系中具有盐溶、脱水和溶剂合3种作用.此结果提供了一种制备无水LiCl的新方法.

关键词: 二元体系, 三元体系, LiCl, HOAc, 相平衡

Abstract: The solubilities of saturated solutions of the title systems have been investigated and the corresponding equilibrium phase diagrams were constructed.As shown in the phase diagram of LiCl-HOAc, there are two solid phases:LiCl and the solvate compound LiCl · (l/2)HOAc, which is soluble incongruently.No LiCl · HOAc and LiCl · 5HOAc have been found.There are three solid phases:LiCl · H2O, LiCl and LiCl ·(1/2)HOAc in the phase diagram of LiCl-HOAc-H2Osystem at 25℃.The changes of the phase LiCl · H2O·LiCl·LiCl · (1/2)HOAc were observed and shows saltingin, anhydration and solvate action of HOAc.Based on the phase diagram of LiCl-HOAc-H2Oternary system, a new method for preparing anhydrous LiCl may be suggested.

Key words: Binary system, Ternary system, LiCl, HOAc, Phase equilibrium

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