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Supercritical carbon dioxide extraction of fatty and waxy material from rice bran
Author(s) -
García A.,
Lucas A.,
Rincón J.,
Alvarez A.,
Gracia I.,
García M. A.
Publication year - 1996
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02523373
Subject(s) - supercritical carbon dioxide , supercritical fluid , extraction (chemistry) , wax , hexane , chemistry , yield (engineering) , supercritical fluid extraction , chromatography , carbon dioxide , bran , rice bran oil , materials science , organic chemistry , raw material , metallurgy
Waxy and fatty materials were removed from rice bran by supercritical carbon dioxide at pressures up to 28 MPa and temperatures between 40 and 70°C. The yields of the supercritical extraction were only 16–60% of those obtained by Soxhlet extraction with hexane. The highest yield was reached at the highest pressure and temperature used (28 MPa and 70°C), indicating that supercritical extraction of this lipid‐bearing material could probably be improved at more severe extraction conditions. The supercritical extract obtained at operational conditions giving high yield was chromatographically characterized. Compared to the hexane extract, the supercritical extract was lighter in color and richer in wax content and long‐chain fatty acids C 20 −C 34 . Triacontanol was the most abundant alcohol in both extracts. Tocopherol contents were similar.