Abstract
In this study, the essential oil of aerial parts species of a plant called Spearmint was extracted by CO2 to optimize the results of the supercritical extraction process. In order to achieve maximum total yield extraction and SF-CO2 concentration, tests were done in a laboratorial pilot considering the Taguchi method under following condition: pressure. 90,100,140,170bar, temperature. of 35, 40, 45, 50°C, mean particles size: 250,500,710,1000μm, flow rate 1,3,5,8ml/s and dynamic time 30,50,90,120min. The optimizing conditions for SCE and SF-CO2 concentration are: 90bar, 45°C, 500μm, 5ml/s, 120min and 90bar, 35°C, 250μm, 1ml/s, 30min. SCE total yield and CO2 concentration are 2.032% and 0.033mg/ml. In similar and optimal conditions of extraction, supplementary tests were done so resulted and experimental amount of the calculated sum are in accordance with total yield extraction and SF-CO2 concentration. This is the first report announcing optimization of spearmint SCE by use of Taguchi method.
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