Research Progress in Supercritical CO₂ Extraction of Functional Oils of Plant

Compared with traditional extraction methods,supercritical CO₂ extraction(SCE)can bring not only better physical and chemical indexes of the obtained oils,but also higher content of unsaturated fatty acids in the obtained oils. For the extraction of complex multi-components raw materials,the comprehensive use of supercritical CO₂ extraction and other extraction methods can better improve the extraction rate and the quality of the target product. Meanwhile,SCE of plant functional oils was summarized in this paper,the principle and process of SCE of plant functional oils were introduced. Effects of control factors(extraction pressure,extraction temperature,extraction time,CO₂ flow,entrainer,physical properties of raw materials)of SCE on the oil extraction rate and quality of oils obtained by different methods were discussed. And the scope and prospect of supercritical CO₂ extraction technology were analyzed.