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Li⁺（K⁺）/CO₃^2-,B₄O₇^2--H₂O三元体系288K相平衡研究

Study on equilibrium solubilities and properties of solutions in the ternary system Li⁺（K⁺）/CO₃^2- ,B₄O₇^2--H₂O at 288K

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【Author】 SANG Shi hua 1,2 ,TANG Ming lin 2, YIN Hui an 2,ZHANG Yun xiang 1 (1.Institute of Chemical Engineering,Sichuan University,Chengdu 610064,China;2.Department of Applied Chemistry,Chengdu University of Technology,Chengdu 610059,China)

【机构】四川大学化工学院；成都理工大学应用化学系；四川大学化工学院四川成都610064成都理工大学应用化学系；四川成都610059；四川成都610064；

【摘要】采用等温溶解平衡法研究了二个三元体系Li+ (K+ ) /CO32 - ,B4 O72 - -H2 O 2 88K时的相平衡及平衡液相的主要物化性质 (密度、电导率、pH)。研究发现 :这二个三元体系均为简单共饱和型 ,无复盐及固溶体形成 ;根据溶解度数据绘制了相图 ,相图中单变量曲线所对应的平衡固相分别为 :Li2 CO3,Li2 B4 O7·3H2 O ;K2 CO3·3 /2H2 O ,K2 B4 O7·4H2 O ;K2 CO3对K2 B4 O7有强烈的盐析作用 ,简单讨论了物化性质的变化规律更多还原

【Abstract】 In this paper,solubilities and properties (density,electrical conductivity and pH) of solution were studied in the ternary system Li +(K +)/CO 3 2- ,B 4O 7 2- -H 2O at 288K by isothermal equilibrium method.Based on the solubility data,the phase diagram of the system was plotted,which consists of two univariant curves, one invariant point .Phase equilibrium solid were K 2B 4O 7·4H 2O , K 2CO 3·2/3H 2O in the system K +/CO 3 2- ,B 4O 7 2- -H 2O.and Li 2CO 3,Li 2B 4O 7·3H 2O in the system Li +/CO 3 2- ,B 4O 7 2- -H 2O. K 2CO 3 have slating out effect to K 2B 4O 7 strongly in the system K +/CO 3 2- ,B 4O 7 2- -H 2O.The phase diagram and properties were discussed simplely.更多还原