Supercritical Carbon Dioxide Extraction of Essential Oil From Iranian Lavender Flower

摘要

Essential oil was extracted from Iranian lavender flowers using supercritical carbon dioxide in a semicontinuous system. The extraction procedure was composed of static and dynamic operations. In this study, a statistical experimental technique based on "Central Composite Design" was applied in order to evaluate and optimize the operating conditions. The effect of important parameters on extraction efficiency such as supercritical pressure, temperature, and static and dynamic periods were investigated in the range of 80-120 bar, 313-333 K, 10-30 min, and 60-140 min, respectively. The results of GC-FID analysis of the extracted samples were utilized in order to determine the extraction yield of four essential constituents such as (1) Camphor, (2) Fenchone, (3) Linalyl acetate, and (4) Linalool. Furthermore, the overall extraction yield was also investigated. The maximum extraction yield was obtained at optimum conditions of 100 bar, 323 K, 10 min (static), and 100 min (dynamic) for semicontinuous process. Overall, the experimental results of this research indicated that supercritical fluid extraction is a viable technique for production of Camphor, Fenchone, Linalyl acetate, and Linalool applicable in pharmaceutical and cosmetic industries.