ISSN : 2663-2187

An experimental study of the behavior of the NaCl+H2O System for purification with Partial Freezing

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Prashant Kasabe, Chetan Kapadnis,Dhananjay Bhatkhande
ยป doi: 10.48047/AFJBS.6.7.2024.788-796


This study is a part of a series of studies undertaken on the effect of incorporation of different salts in the brine NaCl+H2O system. A comprehensive study is carried out on the recovery efficiency of salts by varying the composition of the brine systems during partial freezing. The phase diagram depicts the phase changes that take place on changing temperature, and composition of the system as the pressure has practically no effect on the condition of the system. The partial freezing process is accompanied by kinetic, and thermodynamic changes as well which have their own effect on the behavior of the brine systems subjected to variations in factors such as the quantity of salts, mass fraction, temperature, and overall composition of the system. The experimental work revealed that the partial freezing is quite productive method in deriving the NaCl crystals with almost uniform size without having impurities and defects in its lattice. The eutectic point determined is in harmony with the literature data. The purity of NaCl crystals too was tested after initial and secondary crystallization by using powerful analytical tools like XRD and SEM and was found to be good. The particle size and distribution, surface Chemistry of the crystals were in tandem with the mechanisms of nucleation and growth followed during crystallization. The experimental work was conducted by following standard protocols and the encouraging results obtained will help in optimizing the crystallization of salts from the brine systems at the industrial scale.

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