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
研究与开发

Li+,K+,Ca2+//Cl--H2O四元体系298.2 K固液相平衡研究

  • 于旭东 ,
  • 黎静 ,
  • 任思颖 ,
  • 罗军 ,
  • 曾英
展开
  • 1.成都理工大学材料与化学化工学院,四川 成都 610059
    2.青海盐湖工业股份有限公司,青海格尔木 816000
    3.天府永兴实验室,四川 成都 610213
于旭东(1985— ),男,博士,教授,研究方向为相平衡与分离技术;E-mail:xwdlyxd@126.com

收稿日期: 2024-05-29

  网络出版日期: 2024-07-11

基金资助

四川省科技计划资助项目(2023ZYD0036);天府永兴实验室有组织科研项目(2023KJGG13)

Study on solid-liquid phase equilibrium of Li+,K+,Ca2+//Cl--H2O quaternary system at 298.2 K

  • YU Xudong ,
  • LI Jing ,
  • REN Siying ,
  • LUO Jun ,
  • ZENG Ying
Expand
  • 1. College of Materials and Chemistry & Chemical Engineering,Chengdu University of Technology,Chengdu 610059,China
    2. Qinghai Salt Lake Industrial Co. ,Ltd. ,Golmud 816000,China
    3. Tianfu Yongxing Laboratory,Chengdu 610213,China

Received date: 2024-05-29

  Online published: 2024-07-11

摘要

四川盆地深藏卤水蕴含丰富的锂、钾资源,极具开发利用价值,但共存离子作用关系复杂。为获取深藏卤水中锂钾钙共存氯化物体系在298.2 K时各盐的结晶规律,采用等温溶解平衡法开展了四元体系Li+,K+,Ca2+//Cl--H2O 298.2 K固液相平衡研究,测定了溶解度、平衡液相密度,采用X射线粉晶衍射法分析了平衡固相组成,并绘制了相应的相图。结果表明:298.2 K时,该四元体系有锂钙复盐(LiCl·CaCl2·5H2O)生成,为复杂四元体系;氯化钙结晶形式受共存氯化锂的影响同时存在CaCl2·6H2O和CaCl2·4H2O。对应的固液平衡相图由3个四元共饱点(E1和E2为不相称共饱点、E3为相称共饱点)、7条单变量曲线和5个结晶区组成(结晶区面积由大到小为KCl、LiCl·H2O、CaCl2·4H2O、LiCl·CaCl2·5H2O、CaCl2·6H2O)。

本文引用格式

于旭东 , 黎静 , 任思颖 , 罗军 , 曾英 . Li+,K+,Ca2+//Cl--H2O四元体系298.2 K固液相平衡研究[J]. 无机盐工业, 2025 , 57(3) : 30 -35 . DOI: 10.19964/j.issn.1006-4990.2024-0304

Abstract

Deep brine in Sichuan basin is abundant in lithium and potassium resources,which has significant development potential,however,the interactions among the coexisting ions are complex.To obtain the crystallization law of each salt in the coexistence chloride system of lithium,potassium,and calcium,the solid-liquid phase equilibria of Li+,K+,Ca2+//Cl--H2O quaternary system at 298.2 K was investigated by using isothermal dissolution method.The solubilities and densities of the solution were determined,meanwhile the solid phase of the quaternary invariant point was identified by X-ray diffraction.The phase diagram was constructed by using the measured data.The results showed that the system was a complex quaternary system with the double salt LiCl·CaCl2·5H2O formed,and the crystalline form of calcium chloride was influenced by the coexisting lithium chloride,with both CaCl2·6H2O and CaCl2·4H2O forms present simultaneously.The corresponding solid-liquid phase diagram consisted of 3 quaternary invariant points(points E1 and E2 were incommensurate type,E3 belonged to commensurate type),7 univariate curves and 5 crystallization regions,the area of crystallization regions was decreased in the order of KCl,LiCl·H2O,CaCl2·4H2O,LiCl·CaCl2·5H2O,CaCl2·6H2O.

参考文献

1 郑明贵,于明,范秋蓉,等.中国2025—2035年碳酸锂需求预测:基于灰色关联分析和ARIMA-GM-BP神经网络的组合模型[J].地球科学进展202338(4):377-387.
  ZHENG Minggui, YU Ming, FAN Qiurong,et al.China′s lithium carbonate demand forecast 2025-2035:A combined model based on grey correlation analysis and the ARIMA-GM-BP neural network[J].Advances in Earth Science202338(4):377-387.
2 郑明贵,刘丽珍,陶思敏,等.中国碳酸锂经济安全预警研究[J].盐湖研究202432(2):117-126.
  ZHENG Minggui, LIU Lizhen, TAO Simin,et al.Economic security warning of lithium carbonate in China[J].Journal of Salt Lake Research202432(2):117-126.
3 杨游胜,姚智豪,赵志星,等.富锂硫酸盐型盐湖卤水蒸发实验研究进展[J].无机盐工业202456(4):1-7.
  YANG Yousheng, YAO Zhihao, ZHAO Zhixing,et al.Research progress of lithium-rich sulfate type salt lake brine evaporation experiment[J].Inorganic Chemicals Industry202456(4):1-7.
4 韩佳欢,郑绵平,乜贞,等.我国深层地下卤水钾、锂资源及其开发前景[J].盐湖研究202432(2):90-100.
  HAN Jiahuan, ZHENG Mianping, NIE Zhen,et al.Lithium and potassium resources of oilfield brine and development prospects in China[J].Journal of Salt Lake Research202432(2):90-100.
5 成怀刚,程芳琴.水盐体系相分离[M].北京:冶金工业出版社,2022.
6 杨森楠,张子义,李栋婵.三元体系LiCl-KCl-H2O和LiCl-SrCl2-H2O在288.15 K时稳定相平衡研究[J].化学工程201947(12):54-58.
  YANG Sennan, ZHANG Ziyi, LI Dongchan.Phase equilibria in ternary systems LiCl-KCl-H2O and LiCl-SrCl2-H2O at 288.15 K[J].Chemical Engineering (China)201947(12):54-58.
7 FARELO F, FERNANDES C, AVELINO A.Solubilities for six ternary systems:NaCl+NH4Cl+H2O,KCl+NH4Cl+H2O,NaCl+LiCl+H2O,KCl+LiCl+H2O,NaCl+AlCl3+H2O,and KCl+AlCl3+H2O at T=(298 to 333) K[J].Journal of Chemical & Engineering Data200550(4):1470-1477.
8 WANG Xia, ZHAO Kaiyu, GUO Yafei,et al.Experimental determination and thermodynamic model of solid-liquid equilibria in the ternary system(LiCl+SrCl2+H2O) at 273.15 K and its application in industry[J].Journal of Solution Chemistry201948(4):528-545.
9 LI Long, YUAN Fei, GUO Yafei,et al.Experimental and predictive equilibrium thermodynamics of the aqueous ternary system(LiCl+CaCl2+H2O) at T=288.15 K[J].Journal of Chemical & Engineering Data202065(9):4369-4377.
10 CHRISTOV C, VELIKOVA S, IVANOVA K.Study of (m1LiX+m2CaX2)(aq) where mi denotes molality and X denotes Cl,or Br at the temperature 298.15 K[J].The Journal of Chemical Thermodynamics200032(11):1505-1512.
11 ZENG Dewen, XU Wenfang, VOIGT W,et al.Thermodynamic study of the system(LiCl+CaCl2+H2O)[J].The Journal of Chemical Thermodynamics200840(7):1157-1165.
12 孟浩,罗军,任思颖,等.三元体系LiCl+CaCl2+H2O 348.2 K相平衡研究[J].矿产保护与利用202343(6):114-119.
  MENG Hao, LUO Jun, REN Siying,et al.Phase equilibria of aqueous ternary system LiCl+CaCl2+H2O at 348.2 K[J].Conservation and Utilization of Mineral Resources202343(6):114-119.
13 乌志明,邓小川.盐析作用及其在盐卤分离中应用探讨[J].海湖盐与化工200029(5):11-14.
  WU Zhiming, DENG Xiaochuan.Discussion on salting-out and its application in brine separation[J].Sea-Lake Salt and Chemical Industry200029(5):11-14.
14 LI Dongdong, ZENG Dewen, YIN Xia,et al.Phase diagrams and thermochemical modeling of salt lake brine systems.Ⅱ.NaCl+H2O,KCl+H2O,MgCl2+H2O and CaCl2+H2O systems[J].Calp-had201653:78-89.
15 于旭东,李琪,陈念粗,等.三元体系KCl+CaCl2+H2O 298.2、323.2及348.2 K相平衡研究及计算[J].化工学报202374(8):3256-3265.
  YU Xudong, LI Qi, CHEN Niancu,et al.Phase equilibria and calculation of aqueous ternary system KCl+CaCl2+H2O at 298.2,323.2,and 348.2 K[J].CIESC Journal202374(8):3256-3265.
16 国家市场监督管理总局,国家标准化管理委员会.铝及铝合金化学分析方法 第9部分:锂含量的测定 火焰原子吸收光谱法:GB/T 20975.9—2020[S].北京:中国标准出版社,2020.
17 国家市场监督管理总局,国家标准化管理委员会.铝及铝合金化学分析方法 第33部分:钾含量的测定 火焰原子吸收光谱法:GB/T 20975.33—2020[S].北京:中国标准出版社,2020.
18 国家市场监督管理总局,国家标准化管理委员会.铝及铝合金化学分析方法 第21部分:钙含量的测定:GB/T 20975.21—2020[S].北京:中国标准出版社,2020.
19 李红霞,姚燕,曾德文.水盐体系中有干扰Li+离子存在下测定Mg2+浓度的掩蔽法研究[J].盐湖研究201220(2):24-30.
  LI Hongxia, YAO Yan, ZENG Dewen.Measurement of concentrations of magnesium ion by masking method in presence of the interference lithium ion in salt water system[J].Journal of Salt Lake Research201220(2):24-30.
20 中国科学院青海盐湖研究所分析室.卤水和盐的分析方法[M].2版.北京:科学出版社,1988.
21 中国合格评定国家认可委员会.化学分析测量不确定度的评估指南[M].北京:中国计量出版社,2019.
22 ELLISON S L, WILLIAMS A.EURACHEM/CITAC Guide quantifying uncertainty in analytical measurement[M].3nd ed.London:A Focus for Analytical Chemistry in Europe,2011.
23 任思颖,于旭东,罗军,等.298.2 K四元体系Li+,K+,NH4 +//Cl--H2O相平衡研究[J].化工学报202273(10):4335-4344.
  REN Siying, YU Xudong, LUO Jun,et al.Phase equilibria of aqueous quaternary system Li+,K+,NH4 +//Cl--H2O at 298.2 K[J].CIESC Journal202273(10):4335-4344.
24 崔瑞芝,李武,董亚萍,等.298 K四元体系LiCl-MgCl2-CaCl2-H2O相平衡实验及溶解度计算[J].化工学报201869(10):4148-4155.
  CUI Ruizhi, LI Wu, DONG Yaping,et al.Measurements and calculations of solid-liquid equilibria in quaternary system LiCl-MgCl2-CaCl2-H2O at 298 K[J].CIESC Journal201869(10):4148-4155.
25 阳海棠,刘鹏程,曾德文,等.锂光卤石X-ray衍射标准图谱[J].盐湖研究201624(4):32-36.
  YANG Haitang, LIU Pengcheng, ZENG Dewen,et al.The identification map of lithium carnallite by X-ray diffraction[J].Journal of Salt Lake Research201624(4):32-36.
26 LUO Jun, REN Siying, ZHENG Qiufeng,et al.Solid-liquid phase equilibria determination of quaternary system NH4 +,Mg2+,Ca2+//Cl-H2O at T=298.2 and 323.2 K and P=94.77 kPa[J].Journal of Chemical & Engineering Data202368(3):769-779.
文章导航

/