Designing supercritical carbon dioxide extraction of rice bran oil that contain oryzanols using response surface methodology | Zendy

Wang ChihHung | Zendy; Chen ChaoRui | Zendy; Wu JiaJiuan | Zendy; Wang LingYa | Zendy; Chang ChiehMing J. | Zendy; Ho WaiJane | Zendy

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Designing supercritical carbon dioxide extraction of rice bran oil that contain oryzanols using response surface methodology

Author(s) -

Wang ChihHung,

Chen ChaoRui,

Wu JiaJiuan,

Wang LingYa,

Chang ChiehMing J.,

Ho WaiJane

Publication year - 2008

Publication title -

journal of separation science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.72

H-Index - 102

eISSN - 1615-9314

pISSN - 1615-9306

DOI - 10.1002/jssc.200700583

Subject(s) - rice bran oil , supercritical carbon dioxide , extraction (chemistry) , response surface methodology , chemistry , chromatography , bran , central composite design , hexane , carbon dioxide , supercritical fluid , yield (engineering) , materials science , organic chemistry , raw material , metallurgy

This study examines the supercritical carbon dioxide (SC‐CO 2 ) 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‐CO 2 extracts were determined. With top‐flow type SC‐CO 2 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 CO 2 was consumed during the extraction of 35 g rice bran powder. The concentration factors of oryzanols and triglycerides in SC‐CO 2 ‐extracted oil were higher than in the Soxhlet n ‐hexane extracted oil. SC‐CO 2 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‐CO 2 extracted oil.

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