[Study on recovery of ethyl acetate after extracting tripterygium wifordii extractum with ethyl acetate].
OBJECTIVE
To increase the recovery rate of ethyl acetate after extracting tripterygium wifordii extractum and to decrease product cost.


METHODS
After extracting tripterygium wifordii extractum with ethyl acetate, 3 times saturated salt water was added in it so as to recovery ethyl acetate distilled under normal atmospheric pressure. Ethyl acetate containing salt water was purified through Na2SO4 column.


RESULTS
Ethyl acetate purified could be used repeatedly and the recovery rate was up to 85%.


CONCLUSIONS
This method is completely adapted for mass production.
Bai
Xue-dong
XD
Shandong Lunan Pharmaceutical Factory, Linyi 276006, Shandong, China.
Zhang
Li-xing
LX
Chen
Tao
T
Li
Guan-zhong
GZ
Wang
Xue-hai
XH
Zhang
Wei-guo
WG
D000085:Acetates; D004365:Drugs, Chinese Herbal / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000737:chemistry*; D012965:Sodium Chloride; D013678:Technology, Pharmaceutical / Q000191:economics / Q000379:methods; D029757:Tripterygium / Q000737:chemistry*
D000085:Acetates; D004365:Drugs, Chinese Herbal; D012965:Sodium Chloride; C007650:ethyl acetate