Solubility and Density Isotherms - Potassium and Ammonium Nitrates in Isopropanol Solutions

Abstract

The commercial possibilities of crystallization of inorganic salts by means of organic precipitante are being investigated. Since solubility cannot be predicted accurately, experimental data are necessary in order to permit technical and economic consideration of such a process.Solubilities and saturated solution densities are reported at intervals of 5°from 25°to 75°C. for potassium and ammonium nitrates in aqueous isopropanol solutions. Separation into two liquid phases occurs over part of the concentration and temperature range in the case of both systems.

Phase Changes during Hygroscopic Cycles of Mixed Organic/Inorganic Model Systems of Tropospheric Aerosols

“…49 On the other hand, the systems AN/ethanol/water and AN/2-propanol/water separate into two liquid phases at temperatures above 65.7°C and at room temperature, respectively. 50,51 This behavior is in good correspondence with the one of the AN/1,2-hexanediol/ water and AN/1,4-butanediol/water systems investigated in this study. One possible explanation for this combination of saltingin and salting-out properties is that AN forms contact ion pairs in anhydrous solutions whereas it completely dissociates into NH 4 + and NO 3 -in rather dilute aqueous media.…”

Extended UNIQUAC model for correlation and prediction of vapor–liquid–liquid–solid equilibria in aqueous salt systems containing non-electrolytes. Part B. Alcohol (ethanol, propanols, butanols)–water–salt systems

“…This is, for example, the case when K 2 CO 3 , Na 2 SO 4 , NH 4 NO 3 , or (NH 4 ) 2 SO 4 is added to aqueous ethanol solutions. For aqueous ethanol solutions containing NH 4 NO 3 , only ÿve experimental points were found in literature (Thompson and Vener, 1948). The thermodynamic model presented in this paper does not reproduce the liquid-liquid split in this system.…”

Solubility of Rubidium Nitrate in CH3OH or C2H5OH Aqueous Solutions at Different Temperatures

“…1 In this respect, some research groups have focused on solubilities of various salts in water plus aliphatic alcohols, which may be used to evaluate the potential applicability of the drowing-out procedure as a technique for seperation of these salts. The effect of potassium nitrate and ammonium nitrate on aqueous systems containing isopropanol has been studied by Thompson and Molstad, 2 while Mydlarz et al 3,4 determined the composition and density for an aqueous mixture of alcohol and potassium sulfate. As far as we know, there is no report on the solubility data of CH 3 OH plus RbNO 3 plus H 2 O and C 2 H 5 OH plus RbNO 3 plus H 2 O systems, which are of interest in the design of purification methods for the rubidium nitrate.…”