Authors:L. Aït Hmaïdouch, S. Mançour Billah, and M. El Hadek
The solid—liquid equilibria of the ternary system H2O—Al(NO3)3—Mg(NO3)2 were studied at –30, –20, –10 and 0°C by using a synthetic method which allows to detemine all the characteristic points of isothermal sections. The stable solid phases which appear are respectively: ice, Al(NO3)3·9H2O, Mg(NO3)2·9H2O and Mg(NO3)2·6H2O. Neither double salts nor mixed crystals are observed in the temperature and composition field studied. Polytherm diagram layout show two invariant transformations correspond with an eutectic point and a peritectic point.
Authors:N. Tamer, M. Azouggaghoualen, A. Atbir, S. Mançour-Billah, and M. El Hadek
Desalination of sea-water was investigated. Effluent of desalination plant was evaporated in isotherm and isobar condition.
Density, electric conductivity measurements and chemical analysis were carried out during the process. The results characterising
the crystalline phase provide the fields and limits of the precipitation and separation.
Authors:S. Mançour-Billah, L. Aït Hmaïdouch, M. El Hadek, and R. Cohen-Adad
A program has been written to describe solubility surfaces of the polythermal ternary phase diagram Mg(NO3)2–Al(NO3)3–H2O, using the model proposed by Cohen-Adad et al. . In this work we present the calculation of the solubility surface of Mg(NO3)26H2O and Al(NO3)39H2O in the phase diagram. The calculated isothermal sections are in a good agreement with experimental determinations. Coefficients
of the fitting equation that describes the solubility field allow drawing any isothermal section. The monovariant line was
also calculated. The chosen model is well adapted to calculations of these solubility surfaces and gives very good results.
Authors:L. Aït Hmaïdouch, S. Mançour Billah, M. El Hadek, and G. Coffy
The solid-liquid equilibria of the ternary system H2 O-Al(NO3 )3 -Mg(NO3 )2 were studied at 15, 25, 30, 40 and 50C by using a synthetic method which allows to determine all the characteristic points
of isothermal sections. In all isotherms the liquidus exhibit two curves corresponding to the saturation in Mg(NO3 )2 ⋅6H2 O and Al(NO3 )3 ⋅9H2 O. Neither double salts nor mixed crystals are observed in the temperature and composition field studied.
Authors:A. Atbir, S. Mançour Billah, A. Marrouche, M. El Hadek, R. Cohen-Adad, and M.-Th. Cohen-Adad
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.