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標題: Designing supercritical carbon dioxide extraction of rice bran oil that contain oryzanols using response surface methodology
作者: Wang, C.H.
Chen, C.R.
Wu, J.J.
Wang, L.Y.
Chang, C.M.J.
Ho, W.J.
關鍵字: free fatty acids
rice bran oil
supercritical carbon
fluid extraction
期刊/報告no:: Journal of Separation Science, Volume 31, Issue 8, Page(s) 1399-1407.
摘要: This study examines the supercritical carbon dioxide (SC-CO2) extraction of oryzanols contained rice bran oil from powdered rice bran. The extraction efficiencies and concentration factors of oryzanols, free fatty acids and triglycerides in the SC-CO2 extracts were determined. With top-flow type SC-CO2 extraction the total oil yield was 18.1% and the extraction efficiencies of oryzanols and triglycerides were 88.5 and 91.3% respectively, when 2750 g CO2 was consumed during the extraction of 35 g rice bran powder. The concentration factors of oryzanols and triglycerides in SC-CO2-extracted oil were higher than in the Soxhlet n-hexane extracted oil. SC-CO2 extractions indicated that pressure can be used more effectively than temperature to enhance the extraction efficiency and concentration factor of oryzanols. A two-factor central composite scheme of response surface methodology was employed to determine the optimal pressure (300 bar) and temperature (313 K) for increasing the concentration of oryzanols in the SC-CO2 extracted oil.
ISSN: 1615-9306
Appears in Collections:化學工程學系所



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