The use of supercritical fluid carbon dioxide (SFCO2) in extraction of lanolin and its alcohol is superior to the conventional solvent extraction method. Its distinctive advantages include high extractive ratio, nonto...The use of supercritical fluid carbon dioxide (SFCO2) in extraction of lanolin and its alcohol is superior to the conventional solvent extraction method. Its distinctive advantages include high extractive ratio, nontoxic and nonflammable solvents, and minimal by -product pollution. The resulting refined lanolin and its alcohol have light color and little odor, and can be used as raw materials for high grade cosmetic products.展开更多
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...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.展开更多
The feasibility of removal of the organochlorine pesticides residues of hexachlorocyclohexane(BHC) from radix ginseng with supercritical CO2 was explored. Some factors, such as extraction pressure, extraction temperat...The feasibility of removal of the organochlorine pesticides residues of hexachlorocyclohexane(BHC) from radix ginseng with supercritical CO2 was explored. Some factors, such as extraction pressure, extraction temperature, and kinds of co-solvents were investigated. The experimental results indicate that it is possible to reduce BHC residues in radix ginseng to the level of 0.1 × 10^-6 with supercritical CO2 in the presence of suitable amount of co-solvent, such as water.展开更多
基金Science Foundation of National Education Commission(99053)
文摘The use of supercritical fluid carbon dioxide (SFCO2) in extraction of lanolin and its alcohol is superior to the conventional solvent extraction method. Its distinctive advantages include high extractive ratio, nontoxic and nonflammable solvents, and minimal by -product pollution. The resulting refined lanolin and its alcohol have light color and little odor, and can be used as raw materials for high grade cosmetic products.
文摘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.
文摘The feasibility of removal of the organochlorine pesticides residues of hexachlorocyclohexane(BHC) from radix ginseng with supercritical CO2 was explored. Some factors, such as extraction pressure, extraction temperature, and kinds of co-solvents were investigated. The experimental results indicate that it is possible to reduce BHC residues in radix ginseng to the level of 0.1 × 10^-6 with supercritical CO2 in the presence of suitable amount of co-solvent, such as water.
