Solid-liquid Metastable Equilibria in Quaternary System Li_2SO_4+Li_2CO_3+Li_2B_4O_7+H_2O at 288 K  

作　　者：SANG Shi-hua ZHANG Zhen-lei LI Ming 

机构地区：[1]College of Materials and Chemistry ＆ Chemical Engineering, Chengdu University of Technology, Chengdu 610059, P. R. China

出　　处：《Chemical Research in Chinese Universities》2009年第5期740-743,共4页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China(No.40303010);the Young Science Foundation of Sichuan Province in China(No.08ZQ026-017);the New Century Excellent Talents in University of China(No.NCET-07-0125)

摘　　要：Metastable equilibrium solubilities and densities of quaternary system Li2SO4＋Li2CO3＋ Li2B4O7＋H2O at 288 K were determined by isothermal evaporation method. According to the experimental data, the metastable equilibrium phase diagram was plotted. The metastable phase diagram had one invariant point F, three double saturated liquid curves ElF, E2F and E3F, and three crystallization fields corresponding to Li2SO4·H2O, Li2CO3 and LiBO2·8H2O. It was found that lithium sulphate（Li2SO4） had the highest concentration and strong salting-out effects on the other salts. There were no solid solutions or double salts formed in the quaternary system at 288 K.Metastable equilibrium solubilities and densities of quaternary system Li2SO4＋Li2CO3＋ Li2B4O7＋H2O at 288 K were determined by isothermal evaporation method. According to the experimental data, the metastable equilibrium phase diagram was plotted. The metastable phase diagram had one invariant point F, three double saturated liquid curves ElF, E2F and E3F, and three crystallization fields corresponding to Li2SO4·H2O, Li2CO3 and LiBO2·8H2O. It was found that lithium sulphate（Li2SO4） had the highest concentration and strong salting-out effects on the other salts. There were no solid solutions or double salts formed in the quaternary system at 288 K.

关 键 词：Metastable equilibrium LITHIUM Quaternary system 

分 类 号：O642.42[理学—物理化学] TQ131.11[理学—化学]