A Simple Densimetric Method to Determine Saturation Temperature of Aqueous Potassium Chloride Solution.
The precise control of crystallization is a key issue in providing a high quality crystalline product. It has to be achieved by, among other means, a proper choice of the solution processing temperature, which is determined on the basis of the metastable zone width and type of solubility curve. In this article experimental data for potassium chloride solution density, as a function of temperature and its correlation in the range from under- to supersaturation, are reported for solution concentrations between 24.62 % w/w and 31.84 % w/w. As could be expected in the case of undersaturated solutions and low supersaturation, the temperature dependence of density for solutions of different saturation may be described by a linear equation within the investigated range of concentrations. It was also proved that for the undersaturation range there exists a pole point, which allows calculation of the saturation temperature, based on the density measured at any temperature.
Department of Chemical Engineering and Process Design, Faculty of Chemistry, Silesian University of Technology, Gliwice, Poland.
Wojciech
W
Bogacz
Department of Chemical Engineering, College of Technological Studies, The Public Authority for Applied Education and Training, Kuwait City, Kuwait.
Mohsen H
MH
Al-Rashed
Department of Chemical Engineering and Process Design, Faculty of Chemistry, Silesian University of Technology, Gliwice, Poland.
Marcin
M
Lemanowicz
Department of Chemical Engineering and Process Design, Faculty of Chemistry, Silesian University of Technology, Gliwice, Poland.
Janusz
J
Wójcik
Crystallization; Densimetry; Potassium chloride; Saturation temperature