Phase equilibria of free fatty acids enriched vegetable oils and carbon dioxide: Experimental data,distribution coefficients and separation factors |
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| Affiliation: | 1. Pharmaceutical Analysis Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz 51664, Iran;2. Kimia Idea Pardaz Azarbayjan (KIPA) Science Based Company, Tabriz University of Medical Sciences, Tabriz 51664, Iran;3. Grupo de Investigaciones Farmacéutico-Fisicoquímicas, Departamento de Farmacia, Facultad de Ciencias, Universidad Nacional de Colombia –Sede Bogotá, Cra. 30 No. 45-03, Bogotá D.C., Colombia;4. Department of Chemistry, University of North Texas, Denton, TX 76203-5070, USA;1. Chemical Engineering Department, National Chung Hsing University, No. 250, Kuokuang Road, Taichung, Taiwan 402, ROC;2. School of Chemical Engineering, Universiti Sains Malaysia, Seri Ampangan, 14300 Nibong Tebal, Pulau Pinang, Malaysia;3. Disaster Prevention and Water Environmental Research Center, National Chiao Tung University, HsinTsu City 300, Taiwan;4. Education and Research Department, Taichung Veterans General Hospital, 160, Chung-Kang Rd., Taichung 407, Taiwan;5. Department of Soil and Environmental Sciences, National Chung Hsing University, No. 250, Kuokuang Road, Taichung, Taiwan 402, ROC;6. Biotechnology Center, National Chung Hsing University, No. 250, Kuokuang Road, Taichung, Taiwan 402, ROC;1. Department of Chemical Engineering, Universidade Estadual do Oeste do Paraná, Toledo, Brazil;2. Department of Chemical Engineering, Universidade Estadual de Maringá, Maringá, Brazil |
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| Abstract: | In present work, the oils were treated by saponification procedure to release fatty acids from triglycerides to obtain free fatty acids (FFA) enriched oils and glycerol. Phase equilibria data for systems FFA enriched rapeseed oil–CO2, FFA enriched corn germ oil–CO2 and FFA enriched borage oil–CO2 were determined at temperatures 35, 45, 65 and 85 °C, and in pressure range from 100 to 550 Bar. Experiments using FFA enriched oils were performed using high-pressure variable–volume view cell, where phase inversions were also observed at temperatures 35 and 45 °C. Samples from liquid and vapor phases were analyzed by gas chromatography for the content of free fatty acids, and based on obtained data; the distribution coefficients and the separation factors between FFA and glycerol were calculated. |
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| Keywords: | Supercritical carbon dioxide Free fatty acids Phase equilibria Ternary system Distribution coefficients Separation factor |
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