摘要
Fish oil ethyl esters complexed with aqueous silver nitrate solution were extracted and rectified by supercritical CO 2 to obtain DHA ester and EPA ester with high purity. The effects of some independent variables,such as extraction pressure, temperature gradient of rectifying column and programmed pressure,on rectification were investigated.The results showed that programmed pressure is suitable for purification of EPA and DHA esters. Increase of column temperature gradient from bottom to top is one of the key elements in rectification. Furthermore, higher temperature gradient leads to better separation effect.
Fish oil ethyl esters complexed with aqueous silver nitrate solution were extracted and rectified by supercritical CO 2 to obtain DHA ester and EPA ester with high purity. The effects of some independent variables,such as extraction pressure, temperature gradient of rectifying column and programmed pressure,on rectification were investigated.The results showed that programmed pressure is suitable for purification of EPA and DHA esters. Increase of column temperature gradient from bottom to top is one of the key elements in rectification. Furthermore, higher temperature gradient leads to better separation effect.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2001年第5期456-459,共4页
CIESC Journal
基金
中国科学院知识创新工程试点资助
国家教委博士学科点专项科研基金 !(No .95 2 990 1)资助项目
