Metastable Equilibrium in Quaternary System Li_2SO_4+K_2SO_4+Li_2CO_3+K_2CO_3+H_2O at 288 K  

作　　者：SANG Shi-hua YIN Hui-an LEI Ning-fei 

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》2007年第2期208-211,共4页高等学校化学研究（英文版）

基　　金：the National Natural Science Foundation of China(No 40303010)

摘　　要：Metastable equilibrium solubilities and densities of the Li2SO4 ＋ K2SO4 ＋ Li2CO3 ＋ K2CO3 ＋ H2O system at 288 K were determined experimentally by using the isothermal evaporation method. According to the experimental data, the metastable equilibrium solubility phase diagram was constructed. In the phase diagram, there are three invariant points, seven univariant curves, and five fields of crystallization： Li2SO4· H2O2,K2SO4, Li2CO3, K2CO3 · 3/ 2H2O and K2SO4· Li2SO4. The double salt K2SO4 · Li2SO4 was found in the metastable equilibria. Lithium carbonate（ Li2CO3 ） has the smallest solubility in the quaternary system.Metastable equilibrium solubilities and densities of the Li2SO4 ＋ K2SO4 ＋ Li2CO3 ＋ K2CO3 ＋ H2O system at 288 K were determined experimentally by using the isothermal evaporation method. According to the experimental data, the metastable equilibrium solubility phase diagram was constructed. In the phase diagram, there are three invariant points, seven univariant curves, and five fields of crystallization： Li2SO4· H2O2,K2SO4, Li2CO3, K2CO3 · 3/ 2H2O and K2SO4· Li2SO4. The double salt K2SO4 · Li2SO4 was found in the metastable equilibria. Lithium carbonate（ Li2CO3 ） has the smallest solubility in the quaternary system.

关 键 词：Metastable equilibrium CARBONATE Sulphate SOLUBILITY 

分 类 号：O645.12[理学—物理化学] TS311[理学—化学]