The solid-liquid phase diagrams of binary mixtures of even saturated fatty acids differing by six carbon atoms

Autor(es)

Costa, Mariana C. ^{[1, 2, 3]} ; Rolemberg, Marlus P. ^[4] ; Meirelles, Antonio J. A. ^[3] ; Coutinho, Joao A. P. ^[1] ; Kraehenbuehl, M. A. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Aveiro, Dept Quim, CICECO, P-3810193 Aveiro - Portugal

^[2] Univ Estadual Campinas, Sch Chem Engn, Dept Chem Proc, LPT, BR-13083970 Campinas, SP - Brazil

^[3] Univ Estadual Campinas, Fac Food Engn, Dept Food Engn, EXTRAE, BR-13083862 Campinas, SP - Brazil

^[4] Univ Fed Maranhao, Dept Chem Technol, DETQI, Sao Luis, Maranhao - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Thermochimica Acta; v. 496, n. 1-2, p. 30-37, Dec. 2009.
• Citações Web of Science: 37
• Assunto(s): Termodinâmica química Equilíbrio sólido-líquido Ácidos graxos

Resumo

This study was aimed at using the solid-liquid phase diagrams for three binary mixtures of saturated fatty acids, especially the phase transitions below the liquidus line. These mixtures are compounded by caprylic acid (C(8:0)) + myristic acid (C(14:0)). capric acid (C(10:0)) + palmitic acid (C(16:0)), lauric acid (C(12:0)) + stearic acid (C(18:0)), differing by six carbon atoms between carbon chains. The phase diagrams were obtained by differential scanning calorimetry (DSC). The polarized light microscopy was used to complement the characterization for a full grasp of the phase diagram. Not only do these phase diagrams present peritectic and eutectic reactions, but also metatectic reactions, due to solid-solid phase transitions common, in fatty acids. These findings have contributed to the elucidation of the phase behavior of these important biochemical molecules with implications in various industrial production. (C) 2009 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: 05/53095-2 - Equilíbrio de fases e processos de separação de misturas graxas e aquosas
• Beneficiário: Antonio José de Almeida Meirelles
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 08/56258-8 - Phase equilibrium and purification processes in the production of biofuels and biocompounds
• Beneficiário: Antonio José de Almeida Meirelles
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Temático