摘要
研究了三元体系Li^+,Mg^(2+)∥SO_4^(2-)—H_2O在25℃时的相关系和平衡液相的密度、粘度、折光率、电导等物化性质,该体系为简单共饱型,两段溶解度曲线对应于体系的两种原始组份Li_2SO_4·H_2O和MgSO_4·7H_2O的结晶区,无复盐和固溶体形成,亦无脱水作用发生,应用电解质溶液Pitzer模型检测该体系25C的溶解度,并用经验或半经验公式对平衡液相的密度和折光率进行了理论计算,计算值与实验值非常接近。
Solubilities of ternary system Li^+. Mg^(2+)/SO_4^(2-)—H_2O were investigated by isothermal method at 25 C. Physico-chemical properties of solutions, such as density, refractive index, viscosity and conductivity were determined. The system is a simple eutonic type. Phase diagram consists of two solubility branches and two crystallization fields corresponding to LiS and EpS. No double salt or solid solution was found in the system. Pitzer model of electrolyte solution was used to cheek the obtained solubilities. Two equations were used to correlate density and refractive index with the composition. Data comparison gives good agreement. Differences between measured and calculated values are less than 0.6％ for the former. 0.15％ for the later.
出处
《盐湖研究》
CSCD
1993年第3期1-5,共5页
Journal of Salt Lake Research
基金
国家自然科学基金
关键词
水盐体系
溶解度
相平衡
盐湖
卤水
Salt-water system, Solubility, Phase equilibrium, Pitzer model
