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 ›› 2019, Vol. 51 ›› Issue (6): 17-20.

• 研究与开发 • 上一篇    下一篇

三元体系K +,Cs +//SO4 2--H2O 298.2 K稳定相平衡研究

吴林鑫1,曾英1,2(),陈佩君1,黄鹏1,陈瑜1,孙玖1,于旭东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. 攀西战略矿产资源综合利用四川省协同创新中心(成都理工大学)
  • 收稿日期:2019-01-14 出版日期:2019-06-10 发布日期:2020-05-12
  • 通讯作者: 曾英
  • 作者简介:吴林鑫(1993— ),女,硕士研究生,研究方向为相平衡与相图;E-mial:973115512@qq.com。
  • 基金资助:
    国家自然科学基金—盐湖联合基金(U1607121);国家自然科学基金(41473059)

Stable phase equilibrium of the ternary system K +,Cs +//SO4 2--H2O at 298.2 K

Wu Linxin1,Zeng Ying1,2(),Chen Peijun1,Huang Peng1,Chen Yu1,Sun Jiu1,Yu Xudong1,2   

  1. 1. College of Materials and Chemistry & Chemical Engineering,Chengdu University of Technology,Chengdu 610059,China
    2. Sichuan Collaborative Innovation Center of Panxi Strategic Mineral ResourcesMulti-Purpose Utilization(Chengdu University of Technology)
  • Received:2019-01-14 Online:2019-06-10 Published:2020-05-12
  • Contact: Zeng Ying

摘要:

采用等温溶解法开展了三元体系K +,Cs +//SO4 2--H2O 298.2 K稳定相平衡研究,测定了该体系溶解度、密度及折光率。结果表明,该三元体系在298.2 K下属于复杂体系,有固溶体(K,Cs)2SO4产生,且固溶体相区最大;其稳定相图包含3条单变量曲线、3个析出相区和2个共饱点;共饱点处对应的液相组成分别为w(K2SO4)=11.69%、w(Cs2SO4)=4.02%和w(K2SO4)=3.39%、w(Cs2SO4)=60.84%。平衡液相的密度和折光率随Cs2SO4含量的增大呈现递增的趋势。采用经验公式对平衡液相的折光率进行理论计算,计算值和实验值具有良好的一致性。

关键词: 稳定相平衡, 硫酸钾, 硫酸铯, 固溶体

Abstract:

The stable phase equilibrium of the ternary system K +,Cs +//SO4 2--H2O has been studied using the isothermal dis-solution method at 298.2 K.The solubilities,densities and refractive indices of the equilibrated solution were determined experimentally.The results showed that the ternary system was of complex type with solid solution [(K,Cs)2SO4] formed at 298.2 K,and with the largest crystalline region for the solid solution [(K,Cs)2SO4].The stable phase diagram of this ternary system contained three univariant curves,three crystalline zones and two invariant points.The mass fraction composition of the two invariant points were w(K2SO4) 11.69%、w(Cs2SO4) 4.02% and w(K2SO4) 3.39%、w(Cs2SO4) 60.84%,respectively. The density and refractive index of the solution increased along with the increase of the Cs2SO4 contents.Furthermore,the empirical equation developed in the previous study was used to calculate refractive index of the equilibrated solutions,the calculated values results indicated good consistency with the experimental values.

Key words: stable phase equilibrium, potassium sulfate, cesium sulfate, solid solution

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