Topological transformation of phase diagrams in KBr–оxyethylated surfactant–water pseudo-ternary systems

Abstract

A scheme was developed to explain the transformation of phase diagrams for KBr–oxyethylated surfactant–water systems in response to varying temperature. This scheme was shown to correspond with the respective scheme for salt–binary solvent systems. The surfactant structure was shown to have an effect on the temperature ranges of existence of a liquid–liquid two-phase equilibrium field and the positions of critical points. The elucidated trends serve as the basis for selecting components and optimizing parameters of surfactant- involving extraction processes.