Precipitation studies in a foam column: Potash alum from aqueous solution using 2‐propanol

Abstract

A pneumatically-mixed foam column is described for the precipitation of potash alum from aqneous solution using 2-propanol a s the water-miscible salting-out agent. Controlled precipitation is achieved by first evaporating the alcohol into the foam-producing air stream. Guidelines are given for some optimum modes of operation.

Compositions, Densities, and Refractive Indices of Potassium Chloride + Ethanol + Water and Sodium Chloride + Ethanol + Water Solutions at (298.15 and 313.15) K

“…where Y represents density (g/cm 3 ), or the refractive index of the ternary system, and the A i values are empirical constants whose values are listed in Tables 8 and 9, together with the absolute average deviation (AAD) of the fit. The solid line in Figure 3 represents the density values for the sodium chloride + ethanol + water system obtained using the equation of fit.…”

“…Studies are available in the literature on solubilities of various salts in water + organic solvents, the objectives of which have been to evaluate the potential applicability of the drowning-out procedure as a technique for separation of these salts. − NaCl and KCl are present to a large extent in natural inorganic salt deposits; several authors − have recently studied the effects on the solubilities of these salts by the addition of organic solvents to their aqueous solutions.…”

Solubilities, Densities and Refractive Indices of Rubidium Chloride or Cesium Chloride in Ethanol Aqueous Solutions at Different Temperatures

“…1 Studies are available in the literature on solubilities of various salts in water plus organic solvents, the objectives of which have been to evaluate the potential applicability of the drowning-out procedure as a technique for separation of these salts. [2][3][4][5][6][7][8][9] As far as we know, there is no report on the solubility data of the RbCl-C 2 H 5 OH-H 2 O and CsCl-C 2 H 5 OH-H 2 O ternary systems at 25 and 35 ℃, which are of interest in the design of purification methods for rubidium chloride and cesium chloride. In this study, solubility, density and refractive index data have been measured for the two ternary systems at 25 and 35 ℃.…”