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Li_2SO_4-Na_2SO_4-H_2O三元体系308.15K介稳相平衡研究

Metastable Phase Equilibria of the Ternary System Li_2SO_4-Na_2SO_4-H_2O at 308.15 K
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摘要 采用等温蒸发法研究了Li2SO4-Na2SO4-H2O体系308.15K介稳相平衡及平衡液相物化性质(密度、电导率、折光率、粘度),根据实验数据绘制了相应的介稳相图及物化性质组成图。研究发现:该介稳体系中有2种复盐,即Db1(Li2SO4.3Na2SO4.12H2O)和Db2(Li2SO4.Na2SO4)形成,其介稳相图中有三个共饱点、4条溶解度曲线和4个结晶相区。 The metastable phase equilibria and the physicochemical properties (density, refractive index, conductivity and viscosity) of the ternary system Li2SO4 - Na2SO4 - H2O at 308.15 K were studied using the isothermal evaporation method. According to the experimental data, the metastable equilibrium phase diagram and physicochemical properties composition diagram were plotted. The experimental results of the metastable equilibria show that the double salts of Dbl (Li2SO4 · 3Na2SO4 · 12H2O) and Db2 (Li2SO4 · Na2SO4 ) are formed in the ternary system Li2SO4 - Na2SO4 - H2O at 308.15 K. In the metastable phase diagram, the ternary system has three eutectic points, four solubility curves, and four crystallized regions corresponding to minerals of Li2SO4 · H2O, Li2SO4 · Na2SO4, Li2SO4· 3Na2SO4 · 12H2O, and Na2SO4.
出处 《盐业与化工》 CAS 北大核心 2008年第4期22-24,28,共4页 Jounral of Salt and Chemical Industry
基金 国家自然科学基金(40773045) 中科院"百人计划"项目(0560051057) 博士学科点基金(20060616004)资助
关键词 介稳相平衡 溶解度 硫酸锂 含锂复盐 metastable phase equilibrium solubility lithium sulfate double salts of lithium
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