高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (2): 190.

• 研究简报 • 上一篇    下一篇

KBr-RE(La,Sm)Br3-13%HBr-H2O四元体系25℃时的相平衡研究

王惠, 冉新权, 陈佩珩   

  1. 西北大学化学系, 西安, 710069
  • 收稿日期:1996-01-29 出版日期:1997-02-24 发布日期:1997-02-24
  • 通讯作者: 王惠, 女, 35岁, 硕士, 讲师.
  • 作者简介:王惠, 女, 35岁, 硕士, 讲师.
  • 基金资助:

    国家自然科学基金

A Study of Phase Equilibrium Diagram of Quaternary System KBr-RE (La,Sm)Br3-HBr-H2O at 25 ℃

WANG Hui, RAN Xin-Quan, CHEN Pei-Heng   

  1. Department of Chemistry, Northwest University, Xi' an, 710069
  • Received:1996-01-29 Online:1997-02-24 Published:1997-02-24

关键词: 四元体系, 三溴化镧(钐), 溴化钾, 氢溴酸, 反应机理

Abstract: Phase chemical relation of quaternary systems KBr-REBr3-HBr (13%)-H2O (25℃, RE=La, Sm) were determined, and the rule of phase change was also discovered bere when REare light rare earth elements.It is found from the experiment that the quaternary systems in which KBr and REBr3 react in hydrobromic acid belong to a simple eutectic type,so the reaction mechanism for synthesizing compound K2REBr5 type and real action of the first step reaction can be explained with Meyer's method.Furthermore, it can be seen from comparison between the systems in this paper and the system CsBr-REBr-HBr (13%)-H2O (25℃) that CsBr and REBr3 acting in hydrobromic acid with each other can form doublecompound easier than KBr and REBr3.

Key words: Quaternary system, Lanthanum (samarium) tribromide, Potassium bromide,Hydrobromic acid, Reaction mechanism

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