Physical Behavior of the Phases from the Liquid-Liquid Equilibrium of Citrus Essential Oils Systems at 298.2 K

Autor(es)

Goncalves, Daniel ^[1] ; Paludetti, Mayara F. ^[1] ; Florido, Priscila M. ^[1] ; Tonetti, Camila ^[1] ; Goncalves, Cintia B. ^[1] ; Rodrigues, Christianne E. C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Food Engn ZEA FZEA, LES, Ave Duque de Caxias Norte 225, BR-13635900 Pirassununga - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF CHEMICAL AND ENGINEERING DATA; v. 63, n. 8, p. 2718-2737, AUG 2018.
• Citações Web of Science: 1

Resumo

Solvent extraction is a fractionation process applied to separate terpenes and oxygenated compounds from citrus essential oils (EOs). Once the knowledge of the physical properties of phases was found to be crucial for equipment design and the scaling of tubes and accessories, this study focused on the evaluation of density, viscosity, and interfacial tension of phases from the liquid-liquid equilibrium of citrus EO systems. Model mixtures of orange and lemon EOs and real systems at 298.2 K were prepared, and the physical properties of their phases were thus evaluated. Increased water content in the solvent led to higher values of density, viscosity, and interfacial tension, whereas an increased amount of oxygenated compounds caused lower interfacial tensions. Densities estimated by the simple mixing rule provided good results. Parameters of the Grunberg-Nissan model adjusted to the model systems data exhibited a good description of the viscosities of real systems. The UNIFAC-VISCO model provided suitable predictions of viscosities of the solvent phases, and satisfactory results for the interfacial tensions were calculated by linear adjustment and the Bahramian Danesh thermodynamic model, except for the real acid lime system. (AU)

• Processo FAPESP: 13/11150-3 - Fracionamento de óleos essenciais cítricos utilizando etanol com diferentes níveis de hidratação como solventes: equilíbrio de fases, propriedades físicas e extração em equipamento contínuo
• Beneficiário: Daniel Gonçalves
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 14/22272-5 - Determinação experimental de tensão interfacial das fases em equilíbrio de sistemas modelo compostos por óleo essencial de laranja ou lima ácida, etanol e água, a 25 °C
• Beneficiário: Mayara Fregonezi Paludetti
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica