The solid-liquid phase diagrams of binary mixtures of even saturated fatty alcohols

Autor(es)

Carareto‚ N.D.D. ; Costa‚ M.C. ; Rolemberg‚ M.P. ; Krähenbühl‚ MA ; Meirelles‚ A.J.A.

• Tipo de documento: Artigo Científico
• Fonte: Fluid Phase Equilibria; v. 303, n. 2, p. 191-e1, 2011.

Resumo

This study is part of a work developed in the author's research group on the solid-liquid equilibrium of fatty substances. The phase diagrams of the following fatty alcohol systems were determined by differential scanning calorimetry (DSC): 1-octanol + 1-dodecanol, 1-octanol + 1-tetradecanol, 1-decanol + 1-tetradecanol, 1-decanol + 1-hexadecanol and 1-dodecanol + 1-octadecanol. The liquidus lines of three of these systems were previously reported in the literature but the other two systems were never published. Moreover other transitions, in addition to the eutectic temperature, were also detected in all the systems. A region of solid solution at the extreme left of the phase diagrams was observed for all the binary mixtures. Polarized light microscopy was used to complement the characterization of the systems for a full grasp of the phase diagrams. The solid-liquid equilibrium was modeled using the Margules 2-suffix, Margules 3-suffix, NRTL and UNIFAC Dortmund equations. (c) 2011 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 08/09502-0 - Estudo detalhado do equilíbrio sólido-líquido de misturas de álcoois graxos com ácidos graxos
• Beneficiário: Mariana Conceição da Costa
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 07/06162-1 - Estudo do equilíbrio sólido-líquido em sistemas binários de álcoois graxos através da calorimetria exploratória diferencial
• Beneficiário: Natália Daniele Dorighello Carareto
• Modalidade de apoio: Bolsas no Brasil - Mestrado