Na2B4O7-Na2CO3-NaHCO3-NaBO2-H2O四元体系的等温溶度

doi:10.3866/PKU.WHXB20011117

Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (11): 1045-1048.doi: 10.3866/PKU.WHXB20011117

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Isothermal Solubility of Na₂B₄O₇-Na₂CO₃-NaHCO₃-NaBO₂-H₂O System at 25， 35 and 45 ℃

Li Jun;Yang Qin;Zhang Feng-Xing;Li Heng-Xin;Wang Zhen-Jun

Department of Chemistry, Northwest University, Key Laboratory of Phosicoinorganic Chemistry of Shaanxi Province， Xi′an　710069

Received:2001-04-16 Revised:2001-07-13 Published:2001-11-15
Contact: Zhang Feng-Xing E-mail:zhangfx@nwu.edu.cn

Abstract

Abstract: Solubilities and refractive indices of saturated solutions of the system Na2B4O7Na2CO3 NaHCO3NaBO2H2O have been investigated by isothermal method at 25, 35 and 45 ℃. The complex trona (Na2CO3•NaHCO3•2H2O) was found in the system, therefore,there are 5 monosaturated fields,7 disaturated lines and 3 invariant points ：E1t（Na2B4O7•10H2O＋NaBO2•4H2O＋Na2CO3•nH2O）， E2t（Na2B4O7•10H2O＋ Na2CO3•NaHCO3•2H2O＋Na2CO3•nH2O）， E3t（Na2B4O7•10H2O＋Na2CO3•NaHCO3•2H2O＋NaHCO3）， at 25 ℃， n=10； 35 ℃， n=7； 45 ℃， n=1.

Key words: Solubility diagram, Phase equilibrium, Quaternary system, Trona, Borate, 　Carbonate

Li Jun;Yang Qin;Zhang Feng-Xing;Li Heng-Xin;Wang Zhen-Jun. Isothermal Solubility of Na₂B₄O₇-Na₂CO₃-NaHCO₃-NaBO₂-H₂O System at 25， 35 and 45 ℃[J]. Acta Phys. -Chim. Sin. 2001, 17(11), 1045-1048. doi: 10.3866/PKU.WHXB20011117

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Isothermal Solubility of Na₂B₄O₇-Na₂CO₃-NaHCO₃-NaBO₂-H₂O System at 25， 35 and 45 ℃

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Isothermal Solubility of Na2B4O7-Na2CO3-NaHCO3-NaBO2-H2O System at 25， 35 and 45 ℃

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Isothermal Solubility of Na₂B₄O₇-Na₂CO₃-NaHCO₃-NaBO₂-H₂O System at 25， 35 and 45 ℃