Topological transformation of the cesium nitrate-water-isopropanol ternary phase diagram

Phase equilibria and critical phenomena in the cesium nitrate-water-isopropanol system, where the liquid binary subsystem does not separate over the entire temperature range of its liquid state, were studied within 70–120°C using visual polythermal analysis. The temperature at which the monotectic critical tie-line appears (79.0°C) and the compositions of the solutions at critical solution points at various temperatures were determined. Isopropanol distribution coefficients between aqueous and organic monotectic phases were calculated for five temperatures. The salting out of isopropanol by cesium nitrate from aqueous solutions is enhanced by temperature elevation. The phase isotherms validated a previously reported fragment of the general scheme of the topological transformation of ternary phase diagrams for salt-binary solvent systems with salting out. Original Russian Text ? D.G. Cherkasov, V.F. Kurskii, S.I. Sinegubova, K.K. Il’in, 2009, published in Zhurnal Neorganicheskoi Khimii, 2009, Vol. 54, No. 6, pp. 1032–1036.