Metastable Equilibria in the Quinary System of Li＋, K＋//, , CO32- ,SO42- , B4O72, -H2O at 288 K

Acta Chimica Sinica ›› 2010, Vol. 68 ›› Issue (06): 476-480. Previous Articles Next Articles

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五元体系Li^＋, K^＋//, CO₃^2- ,SO₄^2- , B₄O₇^2- -H₂O在288 K时的介稳相平衡研究

桑世华，张晓，赵相颇，肖龙军

(成都理工大学材料与化学化工学院成都 610059)

投稿日期:2009-02-19 修回日期:2009-09-09 发布日期:2010-03-28
通讯作者: 桑世华 E-mail:sangsh@cdut.edu.cn;sangshihua@sina.com.cn

Metastable Equilibria in the Quinary System of Li^＋, K^＋//, , CO₃^2- ,SO₄^2- , B₄O₇², -H₂O at 288 K

Sang Shihua* Zhang Xiao Zhao Xiangpo Xiao Longjun

(College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059)

Received:2009-02-19 Revised:2009-09-09 Published:2010-03-28
Contact: 桑世华 E-mail:sangsh@cdut.edu.cn;sangshihua@sina.com.cn

Abstract

An experimental study on metastable equilibria at 288 K in the quinary system Li^＋, K^＋//, , -H₂O was done by an isothermal evaporation method. Metastable equilibrium solubilities and densities of the solution were determined experimentally. Using the experimental data, the metastable equilibrium phase diagram and water diagram were plotted, respectively. The experimental results of the metastable equilibria show that the double salt K₂SO₄•Li₂SO₄ has been formed in the quinary system Li^＋, K^＋//, , -H₂O at 288 K. In the metastable equilibrium phase diagram (saturated with Li₂CO₃), the quinary system has four invariant points, nine univariant curves, six fields of crystallization saturated with Li₂CO₃ [LiBO₂•8H₂O, K₂B₄O₇•4H₂O, K₂CO₃•3/2H₂O, K₂SO₄, K₂SO₄•Li₂SO₄ and Li₂SO₄•H₂O].

Key words: metastable equilibrium, carbonate, sulfate, borate, solubility

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SANG Shi-Hua, ZHANG Xiao, DIAO Xiang-Pi, XIAO Long-Jun. Metastable Equilibria in the Quinary System of Li^＋, K^＋//, , CO₃^2- ,SO₄^2- , B₄O₇², -H₂O at 288 K[J]. Acta Chimica Sinica, 2010, 68(06): 476-480.

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五元体系Li^＋, K^＋//, CO₃^2- ,SO₄^2- , B₄O₇^2- -H₂O在288 K时的介稳相平衡研究

Metastable Equilibria in the Quinary System of Li^＋, K^＋//, , CO₃^2- ,SO₄^2- , B₄O₇², -H₂O at 288 K

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五元体系Li＋, K＋//, CO32- ,SO42- , B4O72- -H2O在288 K时的介稳相平衡研究