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Citation: ZENG Ying, TANG Ming-Lin, YIN Hui-An. Prediction and Experimental Verification of Phase Equilibrium in the Quaternary System Li⁺,Na⁺//CO₃^2-,B₄O₇^2--H₂O at 298 K[J]. Chinese Journal of Applied Chemistry, ;2001, 18(10): 794-797. shu

Prediction and Experimental Verification of Phase Equilibrium in the Quaternary System Li⁺,Na⁺//CO₃^2-,B₄O₇^2--H₂O at 298 K

1.
Department of Applied Chemistry, Chengdu University of Science and Technology, Chengdu 610059

Received Date: 5 March 2001
Available Online: 3 July 2001
Fund Project: 国家自然科学基金资助项目(49773200) (49773200)地质矿产部(现国土资源部)"九· (现国土资源部)

Based on the solubility data of ternary systems, the single salt parameters and the solu bility product of Li₂CO₃(a), Li₂B₄O₇(b) and Na₂CO₃(c), and the corresponding mixing parameters have been fitted by the multiple linear regression method. Their values are:U_a(0)=-1.235 5,U_a(1)=-2.654 6, C_a^O=-0.004 660 7, U_b(0)=-3.030 6, U_b(1)=-3.023 8, C_b^O=-0.290 89, U_c(0)=-0.293 04,U_a(1)=2.155 6, C_c^O=-0.004 256 0, θ_Li,Na=1.041 8, θ_B,C=-2.630 5, J_Li,Na,C=-0.063 910,J_Li,Na,B=0.493 56,J_Li,B,C=-0.478 42, J_Na,B,C=0.306 16, ln K (Li₂CO₃)=-8.962 9, ln K (Na₂CO₃·10H₂O)=3.064 6, ln K (Li₂B₄O₇·3H₂O)=-7.356 6, ln K (Na₂B₄O₇·10H₂O)=-7.477 8. The predicted solubility values of the quaternary system Li⁺,Na⁺//CO₃^2-, B₄O₇^2--H₂O at 298 K are in good agreement with experimental results obtained from a isothermal method at 298 K.
- Li⁺,
- Na⁺//CO₃^2-,
- B₄O₇^2--H₂O system,
- solubility,
- prediction
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Prediction and Experimental Verification of Phase Equilibrium in the Quaternary System Li+,Na+//CO32-,B4O72--H2O at 298 K

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通讯作者: 陈斌, bchen63@163.com

Prediction and Experimental Verification of Phase Equilibrium in the Quaternary System Li⁺,Na⁺//CO₃^2-,B₄O₇^2--H₂O at 298 K