超临界二氧化碳萃取孜然油工艺技术研究

Extraction of cumin oil using optimization of supercritical CO_2 fluid extraction technology

利用超临界CO2萃取技术提取孜然油。研究了原料粒度、萃取压力、萃取温度、二氧化碳流量等因素在不同萃取时间下对孜然油萃取率的影响,以此为基础进行正交实验设计,确定超临界二氧化碳萃取最佳工艺参数。结果表明:超临界CO2萃取孜然油的适宜工艺参数为萃取时间2.0h、萃取压力为35MPa、萃取温度40℃、原料粉碎度40目、CO2流量25kg/h,分离压力6MPa,分离温度50℃。在此条件下,孜然油提取率达到13.56%。

The supercritical CO2 fluid extraction technology was used to extract cumin oil.The effect of granularity of cumin powder,extract pressure,extract temperature,the flow rate of CO2 on the extract rate of cumin oil under different extract time were researched.Then through the orthogonal design,the optimal extract conditions were obtained.The optimal levels for each variable to obtain the highest extraction yield of cumin oil were as follows： The optimal extraction condition showed that the extraction pressure was at 35MPa,grind degree of material was at 40 hole,flow of liquid CO2 was at 25kg /h,extraction temperature was at 40℃,separate pressure was at 6MPa, separate temperature was at 50℃.Under the condition,the extraction rate of cumin oil was 13.56%.