Araújo, Alessandro Alisson de LemosBarros Neto, Eduardo Lins deChiavone Filho, OsvaldoFoletto, Edson Luiz2021-11-302021-11-302014ARAÚJO, Alessandro Alisson de Lemos; BARROS NETO, Eduardo Lins de ; CHIAVONE FILHO, Osvaldo; FOLETTO, Edson Luiz. Determinación de los parámetros del modelo de flory-huggins para estimación del punto de nube de surfactantes no iónicos. Informacion Tecnologica, v. 25, n. 5, p. 165-174, 2014. Disponível em: https://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0718-07642014000200019&lng=en&nrm=iso&tlng=en. Acesso em: 26 jul. 2021. DOI: http://dx.doi.org/10.4067/S0718-076420140002000190718-0764https://repositorio.ufrn.br/handle/123456789/45083The cloud point of different polyethoxylated surfactants have been experimentally determined and thermodynamic parameters such as enthalpy and entropy of mixing using the Flory-Huggins model have been determined. The non-ionic surfactants are compounds that can be used as separation aid in processes such as extraction. This separation process is based on a chemical phenomenon that occurs when a solution of non-ionic surfactants is subjected to warming, increasing the temperature until getting a turbid liquid. The temperature at this point is known as the cloud point. The experimental methodology considered the preparation of solutions of 0.25 to 20% by mass for each surfactant studied and the heating process until reaching the cloud point. The parameters in the Flory-Huggins model were obtained using the Levenberg-Marquardt method and presented a satisfactory adjustment to the experimental data for all the surfactants studied in this workAttribution-NonCommercial 3.0 Brazilhttp://creativecommons.org/licenses/by-nc/3.0/br/Levenberg-MarquardtSurfactantes no iónicoPunto de nubeGrado de etoxilaciónModelo Flory-Hugginsarticle