三元体系Li^+∥Cl^-、borate-H_2O 323K稳定相平衡研究  

Stable Phase Equilibrium in the Aqueous Ternary System Li^+∥Cl^-、borate-H_2O at 323 K

作　　者：李明礼[1,2] 多吉[1,3] 于旭东[1] 曾英[1] 

机构地区：[1]成都理工大学,四川成都610059 [2]西藏地勘局中心实验室,西藏拉萨850033 [3]西藏自治区国土资源厅,西藏拉萨850033

出　　处：《盐业与化工》2014年第9期12-14,共3页Jounral of Salt and Chemical Industry

基　　金：国土资源部公益性项目(201211035-3);国家自然基金(41173071#)

摘　　要：采用等温溶解平衡法,研究了三元体系Li+∥Cl-、borate-H2O 323 K时的稳定相关系,同时测定了平衡液相的密度和折光率值。根据实验数据,绘制了该三元体系的稳定相图以及密度、折光率组成图。研究结果表明:该三元体系为简单三元体系,无复盐或固溶体生成。该体系稳定相图含有1个共饱点、2条单变量曲线和2个单盐结晶相区。两个结晶区分别对应单盐LiCl·H2O和Li2B4O7·3H2O。LiCl对Li2B4O7有较强的盐析作用。平衡液相的密度和折光率值随着LiCl质量分数的增加而增大。The solubility,density and refractive index value of the equilibrated solution in the ternary system Li＋∥Cl-、borate-H2 O were studied at 323 K using an isothermal dissolution method.Based on the experimental data,the stable phase diagram,the density vs composition diagram and refractive index vs composition diagram were constructed.Results show that the ternary system is a simple eutectic type,no double salt or solid solution formed at 323 K.The phase diagram consists of one invariant point,two univariant curves and two crystallization regions.The crystallization regions correspond to single salts lithium chloride monohydrate（LiCl·H2O） and lithium tetraborate trihydrate（Li2B4O7·3H2O）,respectively.Salt LiCl has strong salting-out effect on salt Li2B4O7.The density and refractive index of the equilibrated solution increase with the increase of the mass fraction of LiCl.

关 键 词：稳定相平衡 锂 硼酸盐 等温溶解 

分 类 号：O642[理学—物理化学]