CAJ | 학술논문

系统研究了1,2-丙二醇+MCl (M=Na,K,Rb,Cs)+H2O三元体系在298.15和308.15 K时的等温相平衡.采用硝酸汞滴定法测定了体系中无机盐的含量,采用安东帕RXA170折光率仪及DMA4500密度计测定了所有体系的折光率和密度数值,报道了1,2-丙二醇质量分数从O增加到0.9过程中饱和及不饱和三元溶液体系的等温溶解度、密度和折光率数据.实验结果发现,随着1,2-丙二醇的不断加入,饱和溶液的溶解度和密度均呈现出减小的趋势,而折光率的变化则呈现出相反的趋势.采用经验方程关联了不同醇水比条件下不饱和溶液的密度和折光率实验数据,获得了较为理想的拟合结果.本研究的开展充实了碱金属盐在混合溶剂中的热力学数据,为相关溶液化学研究奠定了基础.
계통연구료1,2-병이순+MCl (M=Na,K,Rb,Cs)+H2O삼원체계재298.15화308.15 K시적등온상평형.채용초산홍적정법측정료체계중무궤염적함량,채용안동파RXA170절광솔의급DMA4500밀도계측정료소유체계적절광솔화밀도수치,보도료1,2-병이순질량분수종O증가도0.9과정중포화급불포화삼원용액체계적등온용해도、밀도화절광솔수거.실험결과발현,수착1,2-병이순적불단가입,포화용액적용해도화밀도균정현출감소적추세,이절광솔적변화칙정현출상반적추세.채용경험방정관련료불동순수비조건하불포화용액적밀도화절광솔실험수거,획득료교위이상적의합결과.본연구적개전충실료감금속염재혼합용제중적열역학수거,위상관용액화학연구전정료기출.
In this paper,the liquid-solid equilibrium for the ternary systems composed of 1,2-propanediol,MCl (M=Na,K,Rb,Cs),and H2O were studied at 298.15 and 308.15 K,with the mass fraction of 1,2-propanediol ranging from 0 to 0.9.The solubilities,densities,and refractive indices of the saturated systems,and the densities and refractive indices of the unsaturated solutions are reported herein.The solubilities were determined via a titration method using mercury nitrate as the titrant.Refractive index and density data were measured using an Anton Paar RXA170 refractometer and Anton Paar DMA4500 densimeter,respectively.The experimental values of the solubilities and densities of the saturated solutions decreased with increasing 1,2-propanediol concentration,whereas different trends of increase were observed for the refractive indices.The experimental density and refractive index data for the unsaturated solutions increased with increasing 1,2-propanediol to water ratios.Empirical equations have been provided for these properties as a function of concentration.On the basis of the standard deviations,we concluded that the empirical equations could be satisfactorily used to correlate the solubility,density,and refractive index data of the investigated systems.These values will enrich the thermodynamics data for alkali metals in mixed solvents,and lay a foundation for any subsequent work.