RESEARCH ARTICLE


High-Pressure Vapor-Liquid Equilibrium Data for Ternary Systems CO2 + Organic Solvent + Curcumin



Willyan M. Giufrida1, Rogério Favareto1, Vladimir F. Cabra1, M. Angela A. Meireles3, Lucio Cardozo-Filho*, 1, Marcos L. Corazza2
1 DEQ/UEM, Bloco D-90, Avenida Colombo, 5790, PR 87020-900, Maringá, PR, Brazil
2 DEQ/UFPR, Centro Politécnico, Jardim das Américas, 81531-980, Curitiba, PR, Brazil
3 LASEFI/DEA/FEA (College of Food Eng)/UNICAMP (University of Campinas), Rua Monteiro Lobato, 80; 13083-862 Campinas, São Paulo, Brazil


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Creative Commons License
© 2010 Giufrida et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the DEQ/UEM, Bloco D-90, Avenida Colombo, 5790, PR 87020-900, Maringá, PR, Brazil; Tel: +55 44 32614749; E-mail: cardozo@deq.uem.br


Abstract

In the present work phase equilibrium data for the ternary systems CO2 + ethanol + curcumin and CO2 + ethyl acetate + curcumin, at different concentrations of curcumin in the organic solvent (0.01 g.cm-3, 0.005 g.cm-3 for ethanol and 0.01 g.cm-3, 0.0025 g.cm-3 for ethyl acetate) are reported. The static synthetic method, using a variable-volume view cell was employed for obtaining the experimental data in the temperature range of (303 to 333) K and pressures up to 11 MPa. Vapor-liquid phase transitions were observed as bubble and dew points for the overall compositions investigated. The phase equilibria of the ternary systems were fitted to the Peng-Robinson equation of state (PR-EoS) using only binary system information. Experimental data together with modeling results may constitute relevant information for the precipitation of curcumin using the supercritical antisolvent process.

Keywords: Phase equilibrium, vapor-solid-liquid, CO2, curcumin, organic solvents.