STUDIES ON THE TECHNOLOGY OF EXTRACTING ESSENCE OIL FROM THE PURPLE PERILLA SEEDS BY SUPERCRITICAL FLUIDS

摘要

In order to obtain higher content of a-linonenic acid from purple perilla seeds, some extracting parameters affecting the extracting processes of SCE have been studied, such as pressure, temperature, density of CO_2 fluid, time of extracting and S/F (SC-CO_2/Fraction).The results of GC-MS analysis indicate that the content of a-linonenic acid in extracts is the highest at the conditions of 20-25 MPa, 40?, and 9-10 L/min of CO_2 fluid, which reached 59.7%, the extraction ratio is 91.8%.