Extraction of Flaxseed Oil by Supercritical Carbon Dioxide

Supercritical fluid extraction(SFE) is a new and efficient separation technology and has its distinctive advantages when compared with the traditional technology.This paper briefly introduced advantages and disadvantages of the traditional extraction technology of linseed oil,and emphasis was put on the affecting factors of supercritical CO2 extraction,including extraction pressure,temperature,and the flux of CO2.The results showed that increasing the pressure and the flux of CO2 was apparently beneficial to oil extraction until the pressure was 40MP and the flux 20kg/h,while temperature exerted less influence on the yield;removing flaxseed gum was an effective pretreatment as to reducing extraction time.