高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (7): 1236.

• 研究论文 • 上一篇    下一篇

四元体系Na2B4O7-Na2CO3-NaHCO3-NaBO2-H2O多温(0～45℃)溶度研究

张逢星, 杨琴, 李珺, 王振军, 李恒欣   

  1. 西北大学化学系, 陕西省物理无机化学重点实验室, 西安 710069
  • 收稿日期:2001-08-03 出版日期:2002-07-24 发布日期:2002-07-24
  • 通讯作者: 张逢星(1954年出生),男,教授,从事物理无机化学和功能配合物化学研究.

Studies on the Polythermal Solubility of System Na2B4O7- Na2CO3-NaHCO3-NaBO2-H2O at0-45 ℃

ZHANG Feng-Xing, YANG Qin, LI Jun, WANG Zhen-Jun, LI Heng-Xin   

  1. Department of Chemistry of Northwest University, Shaanxi Province Key Laboratory of Physicoinorganic Chemistry, Xi′an 710069, China
  • Received:2001-08-03 Online:2002-07-24 Published:2002-07-24

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摘要： 报道了四元体系Na2B4O7-Na2CO3-NaHCO3-NaBO2-H2O在0,15,25,35及45℃时的等温溶度,通过数据拟合等温截面无变点溶度数据与温度的关系,给出了相应的溶度-温度关系式,绘出了该体系0～45℃时的多温关系图.这些结果有助于揭示含硼碱湖的固体盐矿成因,给出了有关盐卤存在的反应2Na2CO3+Na2B4O7+H2O=4NaBO2+2NaHCO3的相化学揭示.

关键词: 多温溶度图, 四元体系, 盐湖资源

Abstract: The isothermal solubilities of the system Na2B 4O7Na2CO3NaHCO3NaBO2H2Ohave been determined at 0, 15, 25, 35 and 45 ℃. On the basis of the isothermal solubilities of the system we constructed its polythermal solubility diagram at 0-45 ℃ by nonlinear fitting method. The formation temperature of Trona is _19.6 ℃, the temperature is lower than 32.7 ℃ when the system Na2B4O7Na2CO3H2Ois a real ternary one. These results have the values of theory and practice for finding the reason of salts mineral bed forming and phase relations of system.

Key words: Polythermal solubility diagram, Quaternary system, Salt lake resources

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