无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2012, Vol. 44 ›› Issue (11): 15-.

• 论文 • 上一篇    下一篇

三元体系KCl-K2B4O7-H2O在323 K时相平衡研究

钟丝摇1,2,桑世华1,2   

  1. 1.成都理工大学材料与化学化工学院,四川成都 610059; 2.矿产资源化学四川省高校重点实验室
  • 出版日期:2012-11-10 发布日期:2012-11-09

Study on phase equilibria in ternary system KCl-K2B4O7-H2O at 323 K

Zhong Siyao1,2,Sang Shihua1,2   

  1. 1.School of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059,China;
    2.Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions
  • Online:2012-11-10 Published:2012-11-09

摘要: 采用等温溶解平衡法研究了三元体系KCl-K2B4O7-H2O在323 K时的稳定相平衡关系及稳定平衡液相的密度,测定了该三元体系稳定平衡溶液溶解度和密度。研究发现:该三元体系为简单共饱和型,无复盐及固溶体形成。根据溶解度数据绘制了相图,相图中有1个三元共饱点、2条单变量曲线、2个结晶相区,即氯化钾(KCl)结晶区和四硼酸钾(K2B4O7·4H2O)结晶区;平衡固相为KCl和K2B4O7·4H2O。由相图可以看出,KCl对K2B4O7有较强的盐析作用。

关键词: 水盐体系, 相平衡, 钾盐

Abstract: An experimental study on phase equilibria at 323 K in the ternary system KCl-K2B4O7-H2O was made by isothermal method.Phase equilibrium solubilities and densities of the solution were determined.Experimental results showed that the ternary system was a type of simple common saturation without double salt and solid solution.On the basis of solubility data, the phase diagram was plotted,which consisted of one invariant point,two univariant curves,and two crystallization zones,i.e. KCl-and K2B4O7·4H2O-crystallization zones.The equilibrium solid phase was KCl and K2B4O7·4H2O.The phase diagram showed that KCl had the salting-out effect on K2B4O7

Key words: salt-water system, phase equilibrium, potassium salt

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