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Wan C.,Chinese Academy of Agricultural Sciences | Hu S.,Hubei Key Laboratory of Oil crops Lipid Chemistry and Nutrition | Niu Y.,Chinese Academy of Agricultural Sciences | Li W.,Chinese Academy of Agricultural Sciences | Huang F.,Chinese Academy of Agricultural Sciences
Journal of the Chinese Cereals and Oils Association | Year: 2015

For high-value utilization of double-low rapeseed with excellent quality and improving additional value of double-low rapeseed oil and rapeseed meals, supercritical CO2 was used to extract double-low rapeseed oil. Meanwhile the quality of oil and rapeseed meal obtained by supercritical CO2 extraction was studied. The factors including extraction pressure, temperature, time, CO2 quantity of flow and particle size of materials effecting on oil extraction efficiency were investigated by single factor experiments with supercritical CO2. The orthogonal experiment of four factors and three levels was used to optimize the operation parameters. According to results of the experiments, optimal operation parameters were extraction temperature of 35℃, pressure of 30 MPa, time of 120 min, and particle size of materials of 80 mesh. In this optimal condition, the oil yield was 97.15% by supercritical CO2 extraction. The double low rapeseed oils obtained by supercritical CO2 extraction had light color, better acid value and peroxide value compared with the oil extracted with n-hexane. The phospholipid content of oil extracted with supercritical CO2 was 0.021 mg/g, which was 3.82% to n-hexane process. The vitamin E content was 17.26 μg/g, which was about twice than that of n-hexane process. And total phenolic and sterol content were slightly lower than the n-hexane process. The rapeseed meal of double low rapeseed obtained by supercritical CO2 extraction was superior to the meal obtained by n-hexane extraction. It had low phytic acid content, high protein solubility and better color. These study results could help to utilize double low rapeseed for high-value products. ©, 2015, Editorial Department, Chinese Cereals and Oils Association. All right reserved. Source

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