Solid- Liquid Phase Equilibria of (H2O-Mn(H2PO2)2-MnCl2-NaCl), (H2O-Mn(H2PO2)2-MnCl2) and (H2O-NaCl- MnCl2) Systems at 323.15 K

Vedat Adıgüzel

Abstract


The solid-liquid phase equilibria (SLE) and densities of H2O-NaCl- MnCl2-Mn(H2PO2)2 quaternary system, H2O-NaCl-MnCl2 and H2O-MnCl2- Mn(H2PO2)2 ternary systems were investigated at 323.15 K by the isothermal solution saturation method. The analyses of the liquid and solid phases were used to determine the composition of the solid phase using the Schreinemakers graphic method. The ternary systems contain one invariant point, two invariant curves and two crystallization regions. In the quaternary system, there is one invariant point, three invariant curves, and three crystallization areas cor­res­ponding to NaCl, MnCl2 4H2O, and Mn(H2PO2)H2O. The crystallization area of Mn(H2PO2)2 H2O, being the largest in comparison with those of other salts, occupied 80.75 % of the total crystallization area.

The crystallization area of Mn(H2PO2)2.H2O, being the largest in comparison with those of other salts, occupied 80.75 % of the total crystallization area.


Keywords


manganese hypophosphite; manganese chloride; ternary system; Schreinmakers method; density

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DOI: https://doi.org/10.2298/JSC200521059A

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