Liquid-liquid equilibrium of rosemary model essential oil (alpha-pinene plus eucalyptol plus camphor) and solvent (ethanol plus water) at room conditions

Author(s)

Goncalves, Daniel ^{[1, 2]} ; Panzarin, Camila ^[1] ; Goncalves, Cintia Bernardo ^[1] ; da Costa Rodrigues, Christianne Elisabete ^[1]

Affiliation

^[1] Univ Sao Paulo, Dept Engn Alimentos ZEA FZEA, Separat Engn Lab LES, POB 23, BR-13635900 Pirassununga, SP - Brazil

^[2] Univ Estadual Campinas UNICAMP, Dept Engn Alimentos DEA FEA, Lab Extract Appl Thermodynam & Equilibrium ExTrAE, POB 6121, BR-13083862 Campinas, SP - Brazil

• Document type: Journal article
• Source: Fluid Phase Equilibria; v. 521, OCT 15 2020.
• Web of Science Citations: 0

Abstract

Rosemary essential oil is composed of key components used in pharmaceutical and cosmetics products worldwide. Among several components found in rosemary essential oil, it can be simplified by a mixture of alpha-pinene, eucalyptol, and camphor. Aiming an enhanced product quality, the separation of eucalyptol and camphor from alpha-pinene was evaluated employing ethanol + water mixtures as solvents. For that, liquid-liquid equilibrium data of systems composed of alpha-pinene + eucalyptol + camphor + ethanol + water at T = (298.2 +/- 0.1) K were thus assessed. Thermophysical properties of the phases from the equilibrium as density, viscosity, surface tension, and interfacial tension were also evaluated. Increased water amount in the solvent caused decreased distribution coefficients, but higher solvent selectivity and thermophysical properties. Increased oxygenated compounds in the terpene phase also led to enhanced density and viscosity values, but lower solvent selectivity and interfacial tension. Binary interaction parameters of the NRTL adjusted to the experimental data and empirical equations described satisfactorily the phases compositions and thermophysical properties, with relative deviations of 0.73% for NRTL, 0.006% for density, 0.22% for viscosity, 5.78% for surface tension, and 5.88% for interfacial tension. (C) 2020 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 18/13207-6 - Extraction and computational simulation of ethanolic biodiesel production from peanut oil
• Grantee: Daniel Gonçalves
• Support type: Scholarships in Brazil - Post-Doctorate
• FAPESP's process: 14/21252-0 - Equilibrium and production processes of biofuels and bioproducts
• Grantee: Antonio José de Almeida Meirelles
• Support type: Research Projects - Thematic Grants
• FAPESP's process: 17/20840-4 - Valorization of agroindustrial coproducts through obtaining vegetable oils and minority compounds by extraction with solvents
• Grantee: Christianne Elisabete da Costa Rodrigues
• Support type: Regular Research Grants
• FAPESP's process: 18/21558-3 - NTERFACIAL TENSION IN LIQUID-LIQUID SYSTEMS OF INTEREST FOR THE INDUSTRY OF EDIBLE VEGETABLE OILS AND BIOFUELS
• Grantee: Cintia Bernardo Gonçalves
• Support type: Regular Research Grants
• FAPESP's process: 18/18919-4 - Physico-chemical behavior of systems composed of rosemary essential oil, ethanol and water, at 25 °c
• Grantee: Camila Panzarin
• Support type: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 16/10636-8 - From the cell factory to the Biodiesel-Bioethanol integrated biorefinery: a systems approach applied to complex problems in micro and macroscales
• Grantee: Roberto de Campos Giordano
• Support type: Program for Research on Bioenergy (BIOEN) - Thematic Grants