摘要
采用等温溶解法研究了三元体系Mg^(2+)//C1^-,borate-H_2O在308.15 K时的稳定相平衡;测定了上述体系液相中各组份的平衡溶解度及物化性质(密度和pH),根据实验数据绘制了相应相图和物化性质组成图。该体系在308.15 K时有1个共饱点(水氯镁石+镁硼酸盐)、2条饱和溶解度曲线和2个结晶相区,无复盐及固溶体产生。溶液的物化性质随着MgCl_2浓度的增大而有规律地变化。体系中章氏硼镁石发生转化,MgCl_2浓度不同,转化最终产物不同。最后,初步探讨了章氏硼镁石的转化机理。
The stable phase equilibrium of the ternary system Mg2^2＋//Cl^-1,borate-H2O at 308.15 K were studied with the method of isothermal solution equilibrium. The solubilities and physicochemical properties including density and pH value in the above mentioned systems were determined, On the basis of experimental data,the phase diagrams and the physicochemical properties versus composition diagrams were all plotted. In the stable phase diagram of the ternary system, there are one variant point, two invariant stable solubility curves and two crystallizing zones. The system without complex salt and solid solution existed. Conversion phenomenon of hungchaoite had been found. And the conversion of magnesium borate was different if the concentrations of MgCl2 are different. The conversion mechanism of hungchaoite in aqueous solution was also discussed.
出处
《世界科技研究与发展》
CSCD
2011年第5期784-786,813,共4页
World Sci-Tech R&D
基金
天津市海洋资源与化学重点实验室(天津科技大学)开放基金(200907)资助项目
关键词
稳定相平衡
溶解度
镁硼酸盐
stable phase equilibrium
solubility
magnesium borate
