超临界二氧化碳萃取藿香梗和藿香叶浸膏

藿香不仅是一种中草药，还是一种天然香料植物，可从中提取藿香浸膏和藿香油，用来调配香精，用于日用品和食品的加香。本文通过单因素试验和正交试验，对超临界二氧化碳提取藿香梗和藿香叶浸膏的提取工艺条件进行了优化。超临界二氧化碳萃取藿香梗浸膏的最佳工艺条件是萃取压力15 MPa、萃取温度42 ℃、CO₂流量37 L•h^-1、萃取时间3.5 h，产率为1.28%；超临界二氧化碳萃取藿香叶浸膏的最佳工艺条件是萃取压力18 MPa、萃取温度39 ℃、CO₂流量37 L•h^-1、萃取时间3.5 h，产率为2.53%。

Extraction of concrete of patchouli stem and leaf with supercritical carbon dioxide

Patchouli is not only a Chinese herb, but also a natural perfume plant. Patchouli concrete and oil can be extracted from the plant.Single factor experiments and orthogonal experiments were adopted to investigate the effects of extraction pressure, extraction temperature, carbon dioxide flow rate and extraction time on the yield of the concrete of patchouli stem and leaf with supercritical carbon dioxide fluid.The optimum technical parameters of obtaining the concrete of patchouli stem were extraction pressure 15 MPa, extraction temperature 42℃, carbon dioxide flow rate 37 L·h^-1, extraction time 3.5 h.The yield of the concrete of patchouli stem was 1.28%.The optimum technical parameters of obtaining the concrete of patchouli leaf were extraction pressure 18 MPa, extraction temperature 39℃, carbon dioxide flow rate 37 L·h^-1, extraction time 3.5 h.The yield of the concrete of patchouli leaf was 2.53%.