Pilot Scale Extraction of Rice Bran Oil with Dense Carbon Dioxide

The purpose of this study was to measure the effects of temperature, pressure, and flow rate of dense CO2 on its ability to extract, refine, and fractionate rice bran oil. Column beds (300 g) of rice bran were extracted with dense CO2 at a flow rate of ∼2.5 kg/h, temperatures of 0−60 °C, and pressur...

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Bibliographic Details
Published in:Journal of agricultural and food chemistry 1996-10, Vol.44 (10), p.3033-3039
Main Authors: Shen, Zhiping, Palmer, Martin V, Ting, Simon S. T, Fairclough, Robert J
Format: Article
Language:English
Subjects:
ACEITES VEGETALES
ARROZ
Biological and medical sciences
BRAN
Fat industries
Food industries
Fundamental and applied biological sciences. Psychology
HUILE VEGETALE
PLANT OILS
RICE
RIZ
SALVADO
SON
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Summary:The purpose of this study was to measure the effects of temperature, pressure, and flow rate of dense CO2 on its ability to extract, refine, and fractionate rice bran oil. Column beds (300 g) of rice bran were extracted with dense CO2 at a flow rate of ∼2.5 kg/h, temperatures of 0−60 °C, and pressures of 17−31 MPa over a period of 6 h. The extracted total oil; the free fatty acid, α-tocopherol, sterols (campesterol, stigmasterol, β-sitosterol), and oryzanol components; together with moisture were measured at intervals. Extraction was almost complete in 6 h, and rates of extraction were consistent with saturation of the CO2 with rice bran oil throughout most of the process. Extraction of the oil components was described by apparent partition coefficients between the oil and CO2 phases. The observed differences in partition coefficients provide a basis for refining and fractionation of rice bran oil. Keywords: Dense carbon dioxide; extraction; rice bran oil
ISSN:0021-8561
1520-5118
DOI:10.1021/jf950761z