摘要
采用等温溶解平衡法研究了三元体系Mg2+//Cl-,borate—H2O在323.15 K时的溶解度及其平衡溶液的物化性质(密度、折光率、pH、电导率)。根据实验数据绘制了相应的平衡相图及其物化性质组成图。发现了镁硼酸盐的转化现象,并用n(三氧化二硼)/n(氧化镁)来表示;该体系在323.15 K时相图中有1个共饱点(水氯镁石+镁硼酸盐),2条单变量溶解度曲线(分别对应镁硼酸盐和水氯镁石的溶解度曲线),2个结晶相区(分别为水氯镁石和镁硼酸盐)。
Solubilities and physicochemical properties including density,refraction,pH,and conductivity for the aqueous ternary system（Mg2＋//Cl-,borate-H2O） at 323.15 K have been investigated by isothermal equilibrium method.On the basis of the experimental data,the equilibrious phase diagram and composition diagram of physicochemical properties were plotted.Conversion phenomenon of Mg-borates had been found and the amount-of-substance ratio of B2O3 to MgO was used to express the conversion.In the phase diagram of the ternary system,there were one invariant point（bischofite＋Mg-borates）,two univariant curves（corresponding to solubility curves of Mg-borates and bischofite）,and two crystallization regions（bischofite and Mg-borates）at 323.15 K.
出处
《无机盐工业》
CAS
北大核心
2011年第1期15-18,共4页
Inorganic Chemicals Industry
基金
国家自然科学基金重点项目(20836009)
国家自然基金面上项目(40773045)
中科院百人计划择优资助项目(0560051125)
博士学科点专项基金(20060616004)
关键词
相平衡
溶解度
镁硼酸盐
phase equilibrium
solubility
Mg-borate
