Izvestiya of Saratov University.
Chemistry. Biology. Ecology
ISSN 1816-9775 (Print)
ISSN 2541-8971 (Online)

critical tie line

Phase Equilibria and Critical Phenomena for Сut 1 of the Quaternary System Water – Pyridine – Butyric Аcid – Potassium Сhloride

Phase equilibria and critical phenomena in cut 1 of the quaternary system water - pyridine - butyric acid - potassium chloride whose constituent ternary liquid system had a closed binodal curve were studied by means of the visual-polythermal method within 5-80°C. The volumes of two monotectic states in the composition tetrahedron have been found to be in contact via critical tie lines with increasing temperature.

Equilibrium Liquid–Liquid–Solid and Critical Phenomena in the Quaternary System Cesium Nitrate+Water+Pyridine+Butyric Acid with in the Range of 5 to 60°C

Phase equilibria and critical phenomena in the component mixtures of a cut of the composition tetrahedron of the quaternary system cesium nitrate + water + pyridine + butyric acid were studied in the range of 5–60°C by the visual-polythermic method. The phase equilibria in the component mixtures were studied using sections of one cut of the composition tetrahedron.