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

Chem. J. Chinese Universities ›› 2002, Vol. 23 ›› Issue (7): 1236.

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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

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

Abstract

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

CLC Number:

O642.42

TrendMD:

ZHANG Feng-Xing, YANG Qin, LI Jun, WANG Zhen-Jun, LI Heng-Xin . Studies on the Polythermal Solubility of System Na₂B₄O₇- Na₂CO₃-NaHCO₃-NaBO₂-H₂O at₀-45 ℃[J]. Chem. J. Chinese Universities, 2002, 23(7): 1236.

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

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