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        Valorization of rice bran: Modified supercritical CO2 extraction of bioactive compounds

        Oscar Benito-Román,Sandra Varona,María Teresa Sanz,Sagrario Beltrán 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.80 No.-

        In this work, as afirst step in a comprehensive strategy for the valorization of rice bran, the extraction ofoil using supercritical CO2 and ethanol as cosolvent has been studied. The effect of extractiontemperature (40 and 60 C), pressure (30 and 40 MPa) and amount of ethanol used (0, 5 and 10%) has beenconsidered. The quality extracted oil has been evaluated in terms of antioxidant activity, fatty acid profileand bioactive compounds such as phenolics,flavonoids, g-oryzanols, and tocopherols content. Results revealed that, using neat CO2, the best oil in terms of antioxidant activity was obtained at 40 Cand 30 MPa. However, the addition of ethanol as modifier significantly increased the amount of bioactivemolecules extracted and hence the overall antioxidant activity of the oil, which was maximum at 40 MPaand 10% ethanol, regardless the temperature. The use of ethanol also affected the amount of fatty acidsand g-oryzanols extracted.

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