无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2019, Vol. 51 ›› Issue (5): 70-73.

• 化工分析与测试 • 上一篇    下一篇

硼酸在氯化钙溶液中溶解度的测定与关联

陈丽芳1,2,张勤勤1,2,林田1,岳沛莹1   

  1. 1. 天津科技大学化工与材料学院,天津 300457
    2. 天津市海洋资源与化学重点实验室
  • 收稿日期:2018-11-11 出版日期:2019-05-10 发布日期:2020-04-28
  • 作者简介:陈丽芳(1965— ),女,副教授,主要研究方向为海卤水资源综合利用和高盐废水处理;E-mail:chenlifang@tust.edu.cn。

Determination and correlation of solubility of boric acid in calcium chloride solution

Chen Lifang1,2,Zhang Qinqin1,2,Lin Tian1,Yue Peiying1   

  1. 1. College of Chemical Engineering and Materials,Tianjin University of Science & Technology,Tianjin 300457,China
    2. Tianjin Key Laboratory of Marine Resources and Chemistry
  • Received:2018-11-11 Online:2019-05-10 Published:2020-04-28

摘要:

采用静态平衡法测定了298.15~343.15 K时硼酸在不同浓度的氯化钙溶液中的溶解度,并用Apelblat方程、经验方程、λh方程对实验数据进行关联。结果表明:硼酸溶解度随着氯化钙浓度的增加而减小,随温度的升高而增加;上述3种模型均可用于氯化钙溶液中硼酸溶解度与温度的关系,其中Apelblat方程和经验方程的拟合相关系数均在0.99以上,λh方程的拟合系数在0.98以上。硼酸在氯化钙溶液中溶解度的测定与关联为硼酸在氯化钙溶液中冷却结晶以及分离提纯提供了重要的固液相平衡数据,对卤水沉淀法提硼工艺研究具有重要意义。

关键词: 硼酸, 氯化钙, 溶解度

Abstract:

The solubility of boric acid in calcium chloride solution with different concentration was determined by the static equilibrium method in the temperature range at 298.15~343.15 K.The experimental data was correlated by Apelblat equation,empirical equation and λh equation.The results showed that the solubility of boric acid decreased with the increase of calcium chloride concentration and increased with the increase of temperature.The above three kinds of models could be used for the relationship between the solubility of boric acid and temperature in calcium chloride solution.The fitting correlation coefficients of the Apelblat equation and the empirical equation were both above 0.99,and the fitting coefficient of the λh equation was above 0.98.The determination and correlation of boric acid solubility in calcium chloride solution provided important solid liquid equilibrium data for the cool crystallization and separated purification of boric acid in calcium chloride solution.It was of great significance to the research of boron extraction process by halogen precipitation.

Key words: boric acid, calcium chloride, solubility

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