三元体系KBr-K_2SO_4-H_2O在373K的相平衡研究  

Research of phase equilibrium in ternary system KBr-K_2SO_4-H_2O at 373K

作　　者：卢啟富 桑世华[2] 张海[1,3] 李婷[2] 

机构地区：[1]贵州省地矿局一一三地质大队,贵州六盘水553001 [2]成都理工大学材料与化学化工学院 [3]成都理工大学地球化学系

出　　处：《无机盐工业》2015年第2期13-15,共3页Inorganic Chemicals Industry

基　　金：国家自然科学基金(41373062;40973047);高等学校博士学科点专项科研基金(20125122110015)联合资助项目

摘　　要：采用等温溶解平衡法研究了三元体系KBr-K2SO4-H2O在373 K时的相平衡关系,测定了相应温度条件下饱和溶液的溶解度及密度。研究发现:该三元体系为简单共饱和型,无复盐及固溶体形成。根据溶解度数据绘制了相应的平衡溶解度曲线,相图中有1个共饱点,2条单变曲线,2个平衡固相结晶区分别为溴化钾和硫酸钾;对不同温度条件下的KBr-K2SO4-H2O的溶解度做了对比分析和讨论,结果表明:溴化钾对硫酸钾有强烈的盐析作用。此外还简要讨论了该三元体系的密度变化规律。The solid-liquid equilibria in ternary system KBr--K2SO4-H20 at 373 K were studied, and the solubilities and densmes of solution in the ternary system were determined.Research showed that the ternary system was of simple euteetic type and no double salt or solid solution was found;the solubility diagram of the ternary system had one invariant point,two univariant curves,and two fields of crystallization （KBr and K2SOa）.The solubilities of KBr-K2SO4-H20 at different temperatures were compared and analyzed.Results showed that potassium bromide had a strong salting-out function on potassium sulfate obviously. The density changing rule of the KBr-K2SO4-H20 was also discussed simply.

关 键 词：水盐体系 相平衡 硫酸钾 溴化钾 溶解度 

分 类 号：TQ131.13[化学工程—无机化工]