超临界CO2萃取油茶籽的工艺及储存周期的优选OA

In order to optimize the process parameters of supercritical CO2 extraction and storage period for 9 months of Camellia oleifera seed oil,single factor and orthogonal experimental methods were used,and the quality changes of C.oleifera seeds during storage and the effects of different storage period(0,9,18,27,36 months)on the quality of the oil extracted by supercritical CO2 extraction were investigated.The results showed that the extraction pressure had the most significant effect on the extraction rate of C.oleifera seed oil,and the separation Ⅰ pressure was the least effect.The optimal parameters were:extraction pressure of 37 MPa,extraction time of 120 min,extraction temperature of 45℃,and separation Ⅰ pressure of 8.0 MPa.At the same time,it can be seen that with the extension of storage time,the quality of C.oleifera seeds and their oils will change to varying degrees,among which the peroxide value,unsaturated fatty acid mass fraction and sitosterol mass fraction of the oils show significant differences(P＜0.05).In summary,it is advisable to store for no more than 9 months.In the actual production process,different storage times should be selected according to different target components.