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Journal of Thermal Analysis and Calorimetry
Authors: A. Atbir, L. Aneflous, A. Marrouche, M. El Hadek, R. Cohen-Adad, and M.-Th. Cohen-Adad

Abstract  

Polytherm diagram of the ternary system KCl–FeCl2 –H2 O between 0 and 70C. Phase equilibria in the KCl–FeCl2 –H2 O system were studied over the temperature range 0–70C by conductimetric and analytical methods. A solubility polytherm of the system was constructed. We have observed the crystallization fields of the KCl and FeCl2 6H2 O (at 0C), KCl and FeCl2 4H2 O (at 15, 30 and 40C) and KCl, FeCl2 4H2 O and of a double salt KClFeCl2 2H2 O are obtained at 70C.

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Abstract  

A semi-empirical model consistent with thermodynamical conditions of equilibrium was used and oriented to the calculation of phase diagrams of the binary systems H2 O-MgCl2 , H2 O-FeCl2 and H2 O-FeCl3 . For each solid phase, the exploitation of the experimental and bibliographical data gives a liquidus curve equation comprising a limited number of parameters. A such equation allows to calculate with precision the solubility of the stoichiometric solid phase in a large range of temperature and composition.

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Journal of Thermal Analysis and Calorimetry
Authors: A. Atbir, S. Mançour Billah, A. Marrouche, M. El Hadek, R. Cohen-Adad, and M.-Th. Cohen-Adad

Abstract  

The phase diagram of ternary system Na+ , Fe2+ /Cl -H2 O was established over the temperature range 0–70C by conductimetric and analytical methods. A solubility polytherm of the system was constructed. For each temperature, we have determined the nature of the solid phase in equilibrium with the solution and the limit of its area of existence.

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