Liquid-liquid equilibrium phase diagram and density of three water + nonionic surfactant CiEi binary systems
Journal
Journal of Chemical and Engineering Data
Journal Volume
44
Journal Issue
2
Pages
251-253
Date Issued
1999
Author(s)
Abstract
Liquid−liquid equilibrium and density data for three binary systems, water + C6E2, water + C6E3, and water + C7E3, ranging from their lower critical consolute solution temperature to 70 °C at atmospheric pressure are presented in this paper. (CiEj is the abbreviation of nonionic surfactant CH3(CH2)i-1(OCH2CH2)jOH.) The experimental results were correlated with the UNIQUAC model by fitting the UNIQUAC interaction parameters as a function of temperature. Agreement between the calculated and experimental data was excellent for all three systems. The lower critical consolute solution temperature, critical weight fraction, and critical density were estimated by fitting the experimental data to the critical scaling law.
SDGs
Type
journal article