LiCl-MgCl_(2)-H_(2)O三元水盐体系在313.15K相平衡研究  

Phase Equilibrium of LiCl-MgCl_(2)-H_(2)O Ternary Water Salt System at 313.15 K

作　　者：张国俊 保英莲[1] 刘鲤君 赵云 ZHANG Guo-jun;BAO Ying-lian;LIU Li-jun;ZHAO Yun(College of Chemical Engineering,Qinghai University,Qinghai Xining 810016;Testing and Computing Center of Qinghai Province,Qinghai Xining 810008,China)

机构地区：[1]青海大学化工学院,青海西宁810016 [2]青海省测试计算中心,青海西宁810008

出　　处：《广州化工》2021年第14期52-54,共3页GuangZhou Chemical Industry

基　　金：青海省重大科技专项(2018-GX-A8)。

摘　　要：对青海察尔汗盐湖卤水一个三元子体系LiCl-MgCl_(2)-H_(2)O在313.15 K下的相平衡进行研究。测定了这个体系在313.15 K时的溶解度计算数据、折光比率并画出了相图。实验显示313.15 K下该体系共有3个共饱点:LiCl·H_(2)O、LiCl·MgCl_(2)·7H_(2)O和MgCl_(2)·6H_(2)O;3个结晶区:水合盐LiCl·H_(2)O、复盐LiCl·MgCl_(2)·7H_(2)O和水合盐MgCl_(2)·6H_(2)O结晶区。利用Pitzer模型及相关文献报道中的模型参数进行了溶解度的理论预测,计算结果基本与实际研究结果相符。The phase equilibrium of a ternary subsystem LiCl-MgCl_(2)-H_(2)O in Chaerhan salt lake brine at 313.15 K was studied.The solubility data,refractive ratio and phase diagram of the system at 313.15 K were measured.At 313.15 K,the system had three common saturation points:LiCl·H_(2)O,LiCl·MgCl_(2)·7H_(2)O and MgCl_(2)·6H_(2)O,three crystallization zones were as follows:hydrated salt LiCl·H_(2)O,double salt LiCl·MgCl_(2)·7H_(2)O and hydrated salt MgCl_(2)·6H_(2)O.The theoretical prediction of solubility was carried out by using Pitzermodel and the model parameters reported in related literatures,and the calculated results were basically consistent with the actual research results.

关 键 词：相平衡 PITZER模型 盐湖卤水 镁锂分离 

分 类 号：TQ016[化学工程]