Studies on Systems of Salts and Mixed Solvents. XXXI. On the Solubility and Solvation Behaviour of Magnesium Chloride in Mixed Aqueous Organic Solvents

Abstract

Continuing our investigations on the solvation of chlorides of selected main group elements in concentrated solutions of electrolytes this paper is intended to discuss the possibility of the qualitative interpretation of the solubility data by the example of regions of the 25°C solubility isotherm of 11 systems of the type MgCl2  H2O — Organic solvent. As to magnesium chloride a significant influence on the solubility can be noticed in a general analogy to aluminium(III)‐chloride according to the solvent groups of the Kolthoff classification. The results obtained correlate with the results of spectroscopic investigations. Special significance is attached to solid phases so far unknown in literature.

The Influence of Magnesium Acetate on the Structure Formation of Polystyrene‐block‐poly(4‐vinylpyridine)‐Based Integral‐Asymmetric Membranes

“…Magnesium acetate is probably not only influencing the system of the PS‐ b ‐P4VP by complexation with the P4VP chains but also interacting through a complexation with the solvent mixture 33–36. The interaction with the aforementioned block copolymers is indicated by the change of the P4VP behavior, presumably by reducing the solubility of P4VP in the polarized solution and leading to its increasing rigidity.…”

Determination and Modeling of MgCl2 Solubility in Methanol, Ethanol, 2-Propanol, and Their Mixtures from 283 to 343 K

“…16 Compared with vast data on the solubility of MgCl 2 in aqueous electrolyte systems, 17 the solubility data of MgCl 2 in organic solvents is quite limited. Emons and Pollmer (1985) 18 published the solubility of MgCl 2 in water + organic solvents at 298 K. They found the solid phases in the MgCl 2 + water + CH Several thermodynamic models are available for the modeling of the solubility of electrolytes in organic solvents. For example, the electrolyte nonrandom two-liquid (eNRTL) model developed by Chen and his co-workers has been proven feasible in the modeling of mixed solvent system.…”

“…Compared with vast data on the solubility of MgCl 2 in aqueous electrolyte systems, the solubility data of MgCl 2 in organic solvents is quite limited. Emons and Pollmer (1985) published the solubility of MgCl 2 in water + organic solvents at 298 K. They found the solid phases in the MgCl 2 + water + CH 3 OH system were MgCl 2 ·6H 2 O, MgCl 2 ·4H 2 O·2CH 3 OH, and MgCl 2 ·6CH 3 OH. However, the existence of MgCl 2 ·4H 2 O·2CH 3 OH is skeptical because it can be considered as the mixture of MgCl 2 ·6H 2 O and MgCl 2 ·6CH 3 OH.…”

Solid−Liquid Phase Diagram for the System MgCl2−NH3−CH3OH at 298 K

“…It was also identified by the appearance of small, broad peaks at ∼11° 2θ and ∼59° 2θ in X-ray patterns of the solid residues (Figure ). The existence of the T compound within the MgCl 2 −NH 3 −CH 3 OH system was, however, not entirely unexpected based upon the known stability of a similar ternary compound MgCl 2 ·4H 2 O·2CH 3 OH in the MgCl 2 −H 2 O−CH 3 OH system …”

“…It was also identified by the appearance of small, broad peaks at ∼11°2θ and ∼59°2θ in X-ray patterns of the solid residues (Figure 2). The existence of the T compound within the MgCl 2 -NH 3 - 11 17.15 -Lobry deBruyn (1892) 12 16.5 -Hatem (1949) 13 16.36 -Kudo and Toriumi (1959) 14a 18.55 -Emons et al (1985) 15 -1 5 Zhang et al (1992) 7 -∼15…”