Technique research of supercritical CO₂ extraction peanut oil

The peanut oil supercritical extract technology under the low temperature was studied.By using the single factor experiment,the impact of the extraction pressure,temperature,particle size peanut,CO₂ gas flow rate on the peanut oil extraction was investigated.By using the uniform experimental design the peanut oil supercritical extract's best technological conditions were establishmented when the degree of pulverization was 20 items,the extract time was 2 h,extract pressure was 39 MPa,the extract temperature was 59℃,gas flow amount was 30 kg/h,the extraction yield was above 95%,the peanut oil quality was good,the peanut original delicate fragrance taste was pure.The retention rate of peanut meal protein activity is above the 93%.