摘要
Taking extraction rate as an indicator,the extraction technology of Chinese-fir heartwood by supercritical carbon dioxide treatment was studied, and the extraction rate of the SFE-CO<sub>2</sub> method was compared to that of traditional extraction method. The results show that when extraction processing condition were:extraction pressure 30 MPa,extraction temperature 40℃,extraction time 120 m,and flow velocity 20 kg/h,the extraction rate of SFE-CO<sub>2</sub> was 0.99%,0.20%more than that of the traditional extraction method.However,taking the cost into consideration,it is proposed that the traditional extraction is used unless there are specific requirements.
Taking extraction rate as an indicator,the extraction technology of Chinese-fir heartwood by supercritical carbon dioxide treatment was studied, and the extraction rate of the SFE-CO<sub>2</sub> method was compared to that of traditional extraction method. The results show that when extraction processing condition were:extraction pressure 30 MPa,extraction temperature 40℃,extraction time 120 m,and flow velocity 20 kg/h,the extraction rate of SFE-CO<sub>2</sub> was 0.99%,0.20%more than that of the traditional extraction method.However,taking the cost into consideration,it is proposed that the traditional extraction is used unless there are specific requirements.
