Solid-Liquid Phase Equilibria in the Aqueous System Containing Potassium, Magnesium, and Borate at 308.15 K
投稿时间:2019-03-29  修订日期:2019-04-09
DOI:10.12119/j.yhyj.201902007
中文关键词:  
英文关键词:Stable phase equilibrium  Phase diagram  Solubility  Physicochemical property
基金项目:
作者单位E-mail
SHI Chun-cheng College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin, 300457, China 863377179@qq.com 
YANG Juan College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin, 300457, China  
WANG Shi-qiang College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin, 300457, China
Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin, 300457, China 
wangshiqiang@tust.edu.cn 
ZHAO Dong College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin, 300457, China  
GUO Ya-fei College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin, 300457, China
Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin, 300457, China 
 
DENG Tian-long College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin, 300457, China
Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin, 300457, China 
 
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中文摘要:
      
英文摘要:
      Experimental studies on the solubility, density, refractive index, and pH value in the aqueous system containing potassium, magnesium, and borate at 308.15 K were determined with the method of isothermal dissolution equilibrium. Based on the experimental results, the diagrams of solubility, density, refractive index, and pH value in this system were plotted. We found that there were one eutectic point and two crystallization regions corresponding to the large area of inderite (L + Mg2B6O11·15H2O) and the relatively small area of potassium borate tetrahydrate (L + K2B4O7·4H2O), respectively. Neither double salt nor solid solution was found in this system. The physicochemical properties (density, refractive index, and pH value) in solution at 308.15 K changed regularly with increasing potassium borate concentration. The calculated values of density and refractive index using empirical equations of the aqueous system were in good agreement with the experimental values.
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