Single Factor Experimental Study on Perilla Oil Extraction with Supercritical CO_2

[Objective] The study was to determine the technological parameters of single factor on perilla oil extraction with supercritical CO2.[Method] Extraction method with supercritical CO2 was taken to extract perilla seed oil.Through experiment with 4 factors and 5 levels,the effects of extraction temperature,extraction pressure,CO2 flow and extraction time on oil yielding rate of perilla seed were investigated.[Result] With the increase of CO2 flow,the oil yielding rate increased,and it was suitable when CO2 flow was 25-30 L/h.With the increase of extraction temperature,the oil yielding rate increased and the suitable variation range of extraction temperature was 35-40 ℃.With the increase of extraction pressure,the oil yielding rate increased and it was suitable when extraction pressure was 20-25 MPa.With the increase of extraction time,the oil yielding rate increased and the optimum variation range of extraction time was 1.5-2.0 h.[Conclusion] The optimum technological parameters of single factor experiment on perilla oil extraction with supercritical CO2 were CO2 flow of 25-30 L/h,extraction temperature of 35-40 ℃,extraction pressure of 20-25 MPa and extraction time of 1.5-2.0 h.