Abstract: Extraction technique of Chinese cinnamon oil by supercritical carbon dioxide method was studied.Factors affecting extraction yields,such as temperature,pressure,CO₂ flow rate and bulk density of the raw material,were discussed.By orthogonal experiment,optimal technological conditions were achieved as follows:extracting temperature 40℃;extracting pressure 35 MPa;CO₂ flow rate 30 kg/h;bulk density of raw material(0.44±0.02)g/mL.Oil yield obtained by this method is 5 times more than that by steam distillation method.The obtained cinnamon oil is of brownish red color with right pure odor.

Key words: supercritical carbon dioxide, cinnamon oil