Growth and dissolution kinetics of potassium sulphate crystals in aqueous 2-propanol solutions

Continuous crystallization of potash alum: MSMPR kinetics

“…There is some evidence for this phenomenon in the literature particularly for some organic solids crystallizing from different solvents (e.g. Skoda and Tempel, 1967;Bomio et al, 1975;Bourne et al, 1976;Bourne and Davey, 1976;Bourne et al, 1980) and recently also for cyrstallization of potassium sulphate in the presence of acetone (Jones and Mydlarz, 1989) and in the presence of isopropanol (Mydlarz and Jones, 1989e).…”

“…In the cases in which a strong upward curvature on a semilog population density-size plot occurs, simple extrapolation to zero-size in order to obtain nuclei density, no, becomes uncertain (Randolph and Cise, 1972). Jan% and Grootscholten (1984) and Jones et al (1986) have thus calculated the "effective" nucleation rate using the equation:…”

“…As previously, two different methods were used to calculate the nucleation rate (Jones et al, 1986;Jones and Mydlarz, 1989). In the first method the zero-size nucleation rate, Bo, calculated by employing Equation (1 5) over the whole crystal size range.…”

“…Poland. by use of drowning-out can be overcome by careful control of operating conditions (Jones et al, 1986). Subsequently.…”

Growth kinetics of potassium chloride II—Water–ethanol systems

“…Hence, the influence of organic molecules on the mechanisms of spontaneous nucleation and on the crystal habit of the precipitates thus obtained has been investigated by a number of researchers [1][2][3][4][5][6][7]. Comparatively, much less attention has been devoted to the effect of the cosolvents upon the crystallization mechanisms and growth kinetics of inorganic seed crystals [8]. It was, therefore, the object of the present study to investigate the influence of ethanol, a most frequently used co-solvent in drowning-out crystallization, on the growth and dissolution rates of potassium chloride, chosen as a model system.…”