Measurement of Solid-liquid Equilibria in Quaternary System Li＋, K＋//SO42-, B4O72--H2O at 288 K

作     者：SANG Shihua FU Chao ZHANG Tingting ZHANG Xueping XIAO Longjun 

作者机构：College of Materials and Chemistry & Chemical Engineering Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions Chengdu University of Technology Chengdu 610059 P. R. China 

出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)

年 卷 期：2016年第32卷第1期

页      面：90-94页

核心收录：

学科分类：070905[理学-第四纪地质学] 081704[工学-应用化学] 0709[理学-地质学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：Supported by the National Natural Science Foundation of China(Nos.U1407108  41373062) and the Project of the Scientific Research and Innovation Team in Universities of Sichuan Provincial Department of Education  China(No. 15TD0009) 

主　　题：Solid-liquid equilibria Borate Double salt Salting-out effect 

摘      要：In order to utilize the brine resources in China, the solid-liquid equilibria in quaternary system Li＋, K＋//SO42 , B4O72 -H2O at 288 K was studied by the isothermal solution equilibrium method. Solubilities and densities of solutions were determined experimentally. According to the experimental data, the equilibrium phase diagrams, density-composition diagram and corresponding water content diagram of the quaternary system were plotted. Double salt KLiSO4 was found in the reciprocal quaternary system Li＋, K＋//SO42-, B4O72 -H2O at 288 K. The quaternary system has three invariant points, seven univariant curves and five fields of crystallization. The five crystalliza- tion regions correspond to Li2B4O7.3H2O, LizSO4-H2O, K2B4O7-4H2O, K2SO4 and KLiSO4, respectively. The crystal- lization field of salt LizB4O7 3H20 is the largest, whereas that of Li2SO4 H2O is the smallest. The experimental results show that LizSO4 H2O has a strong salting-out effect on other salts.