Research on optimum condition of supercritical fluid CO_2 extraction pepper oil

The extraction optimum condition of pepper oil from pepper of Three Gorges Reservoir Area with supercritical fluid CO2 extraction technique,effect of temperature,pressure and time on extraction of pepper were investigated.The results showed that the temperature was the most important factor on extraction,and second was extraction pressure,and last was extraction time.The experiments also indicated that the optimum parameters of the supercritical CO2 techniques were as follows:extraction temperature was 40 ℃,extraction pressure 10 MPa,and extraction time 75 min,the extraction rate was 9.37% at these conditions.And we could find the supercritical fluid CO2 extraction technical has many advantages:a simple technique,safe to operate,low energy consumption,non-poisonous,easy to recover,high extraction rate and high purity etc.