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 ›› 2015, Vol. 47 ›› Issue (2): 13-.

• 论文 • 上一篇    下一篇

三元体系KBr-K2SO4-H2O在373 K的相平衡研究

卢啟富1,2,桑世华2,张 海1,3,李 婷2   

  1. 1.贵州省地矿局一一三地质大队,贵州六盘水,553001;2.成都理工大学材料与化学化工学院;
    3.成都理工大学地球化学系
  • 出版日期:2015-02-10 发布日期:2015-03-02

Research of phase equilibrium in ternary system KBr-K2SO4-H2O at 373 K

Lu Qifu1,2,Sang Shihua2,Zhang Hai1,3,Li Ting2   

  1. 1.No.113 Geological Brigade,Guizhou Provincial Geological Prospecting Bureau,Liupanshui 553001,China;
    2.College of Materials,and Chemistry & Chemical Engineering,Chengdu University of Technology;
    3.Department of Geochemistry,Chengdu University of Technology
  • Published:2015-02-10 Online:2015-03-02

摘要: 采用等温溶解平衡法研究了三元体系KBr-K2SO4-H2O在373 K时的相平衡关系,测定了相应温度条件下饱和溶液的溶解度及密度。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应的平衡溶解度曲线,相图中有1个共饱点,2条单变曲线,2个平衡固相结晶区分别为溴化钾和硫酸钾;对不同温度条件下的KBr-K2SO4-H2O的溶解度做了对比分析和讨论,结果表明:溴化钾对硫酸钾有强烈的盐析作用。此外还简要讨论了该三元体系的密度变化规律。

关键词: 水盐体系, 相平衡, 硫酸钾, 溴化钾, 溶解度

Abstract: The solid-liquid equilibria in ternary system KBr-K2SO4-H2O at 373 K were studied,and the solubilities and densities of solution in the ternary system were determined.Research showed that the ternary system was of simple eutectic type and no double salt or solid solution was found;the solubility diagram of the ternary system had one invariant point,two univariant curves,and two fields of crystallization(KBr and K2SO4).The solubilities of KBr-K2SO4-H2O at different temperatures were compared and analyzed.Results showed that potassium bromide had a strong salting-out function on potassium sulfate obviously. The density changing rule of the KBr-K2SO4-H2O was also discussed simply.

Key words: salt-water system, phase equilibrium, potassium sulfate, potassium bromide, solubility

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