Study on Subcritical Extraction of Camellia Seed Oil
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Abstract:
Camellia seeds were chosen as raw material in this study，using the new subcritical extraction and molecular distillation to study the optimum conditions of high quality camellia oil. Using oil yield, color and benzopyrene content as the indexes, the optimum conditions of subcritical extraction were: bulk density of raw materials as 0.7 kg/L, extracting time as 50 mins, extracting pressure as 0.5 MPa and the extracting temperature as 45 ℃.The extraction efficiencies of camellia oil was up to 99.12%, with an increase of 15% than traditional method. Refining of molecular distillation conditions were determined: the temperature of 160 ℃, vacuum of 1.0~2.0 Pa, and the resulted acid value decreased by 70.87%, to 0.22 mg/g. Subcritical extraction of camellia oil benzo(?)pyrene were not detected. The studies process has fast, environmentally friendly, low cost and simple technology characteristics. The quality of the camellia seeds meets the national standards for oil.
