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Supercritical extraction of borage seed oil coupled to conventional solvent extraction of antioxidants
Author(s) -
Soto Carmen,
Conde Enma,
Moure Andrés,
Zúñiga María Elvira,
Domínguez Herminia
Publication year - 2008
Publication title -
european journal of lipid science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.614
H-Index - 94
eISSN - 1438-9312
pISSN - 1438-7697
DOI - 10.1002/ejlt.200800045
Subject(s) - extraction (chemistry) , supercritical carbon dioxide , methanol , chemistry , supercritical fluid , oleic acid , solvent , supercritical fluid extraction , yield (engineering) , linoleic acid , chromatography , ethyl acetate , ethanol , fatty acid , organic chemistry , materials science , biochemistry , metallurgy
This paper describes the extraction of borage seed oil by supercritical carbon dioxide (SC‐CO 2 ) and the further extraction of antioxidants from the SC‐CO 2 ‐defatted borage meal with organic solvents (water, methanol, ethanol and ethyl acetate). The optimal conditions for oil extraction were obtained at 303 and 323 K at 200 bar, 2.5 h and a continuous flow of CO 2 of 1.5 L/h introduced through the bottom when the operating pressure and temperature were reached, attaining a yield of 60%. Borage oil is rich in unsaturated fatty acids; oleic acid, linoleic acid and linolenic acid accounted for 74% of the total fatty acid content under the above conditions. The highest extraction yield was achieved using water or methanol as extracting solvent from the SC‐CO 2 ‐defatted borage meal at 303 K and pressures of 200 and 150 bar for water and methanol, respectively. The most potent extracts, according to all methods tested, were obtained with water and methanol.