Solid-Liquid Equilibria for the Quaternary Na2B4O7 - Na2so4 - K2B4O7 - K2so4 - H2O System at 323K

Shi Hua Sang; Xiao Xiao Zeng; Hui Yin Ning; Zhen Lei Zhang

doi:10.4028/www.scientific.net/AMR.233-235.27

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 233-235Solid-Liquid Equilibria for the Quaternary Na2B4O7...

Solid-Liquid Equilibria for the Quaternary Na₂B₄O₇ - Na₂so₄ - K₂B₄O₇ - K₂so₄ - H₂O System at 323K

Abstract:

Solid - liquid Equilibria for the quaternary system Na₂B₄O₇- Na₂SO₄- K₂B₄O₇- K₂SO₄- H₂O at 323K were studied experimentally using the method of isothermal solution saturation. Solubilities and densities of the solution of the system were measured experimentally. On the basis of experimental data, the phase diagram of the quaternary system was constructed. In the equilibrium diagrams of the quaternary system Na₂B₄O₇- Na₂SO₄- K₂B₄O₇- K₂SO₄- H₂O at 323 K, there are three invariant points F1, F2 and F3, seven univariant curves E1-F1, E2-F1, E4-F3, E5-F3, E3-F2, F1-F2 and F2-F3, and five fields of crystallization corresponding to Na₂B₄O₇·10H₂O，K₂B₄O₇·4H₂O，Na₂SO₄，K₂SO₄and Na₂SO₄·3K₂SO₄. The experimental results show that sulfates have bigger solubilities than borates in the quaternary system Na₂B₄O₇- Na₂SO₄- K₂B₄O₇- K₂SO₄- H₂O at 323K.

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Periodical:

Advanced Materials Research (Volumes 233-235)

Pages:

27-31

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https://doi.org/10.4028/www.scientific.net/AMR.233-235.27

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Online since:

May 2011

Authors:

Shi Hua Sang, Xiao Xiao Zeng, Hui Yin Ning, Zhen Lei Zhang

Keywords:

Borate, Phase Equilibrium, Solubility, Sulfate

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