Magnesium chloride-alkali chlorides molten

Magnesium chloride is electrolyzed in a molten mixture with alkali chlorides at... 

Similarly, Holm et al. (1973) measured the enthalpy increments Hr — 7/298 of the congmently melting compounds of 2 1 and 1 1 alkali metal chlorides and magnesium chloride using a high-precision adiabatic drop calorimeter. From the results obtained at several experimental temperatures corresponding with solid and liquid samples, they determined the enthalpies of fusion of these compounds. Values for heat capacities for the molten salt mixtures were also derived. The heat capacities for the 2 1 and 1 1 compounds were estimated from those of the binary compounds according to the relation... 

Like the alkali metals, the pure alkaline earth elements are produced commercially by reduction of their salts, either chemically or through electrolysis. Beryllium is prepared by reduction of BeF2 with magnesium, and magnesium is prepared by electrolysis of its molten chloride. 

Previously we calculated the electronic states of molten chlorides of alkali metals, magnesium and zinc ) as well as molten Si02 ), and found that the mechanism of formation of complex ions and their polymerization, and also the viscosity can be well explained in terms of... 

The alkaline earth metals show a wider range of chemical properties than the alkali metals. The IIA metals are not as reactive as the lA metals, but they are much too reactive to occur free in nature. They are obtained by electrolysis of their molten chlorides. Calcium and magnesium are abundant in the earth s crust, especially as carbonates and sulfates. Beryllium, strontium, and barium are less abundant. All known radium isotopes are radioactive and are extremely rare. 

ARCTON -9 (75-69-4) Reacts violently, with barium, alkali amides, alkali metals, metal powders, sodium, and potassium, molten aluminum or magnesium. Undergoes thermal decomposition when exposed to red-hot surfaces or fire, forming chlorine, hydrogen fluoride or chloride, phosgene, and carbonyl fluoride. Contact with water causes slow decomposition. Attacks some plastics, rubber, and coatings. Attacks aluminum, copper, magnesium, tin, zinc. 

The direct metallothermic reduction of pollucite ore with sodium metal is the primary commercial source of cesium metal. In the process, raw pollucite ore is reduced with sodium molten metal at ca. 650"C to form a sodium-cesium alloy containing some rubidium as impurity. Fractional distillation of this alloy in a distillation column at ca. 700"C produces 99.9 wt.% pure cesium metal. Cesium can also be obtained pyrometallurgiccdly reducing the chloride CsCl with calcium metal or the hydroxide CsOH with magnesium metal. Nevertheless, the electrolytic recovery of a cesium amalgam from an aqueous solution of cesium chloride can be achieved in a process similar to the chlor-alkali production with a mercury cathode. Afterwards, the cesium is removed from the amalgam by vacuum distillation. However, cesium metal is produced in rather limited amounts because of its relatively high cost (US 40,800 /kg)... 

---