发明名称 |
Method for preparing an extract of ginkgo biloba leaves highly enriched in active principles |
摘要 |
The invention concerns a method for preparing an extract of Ginkgo biloba leaves, comprising the following successive steps: i) extracting dry fragments of Ginkgo biloba leaves in ethanol containing at least 20 wt. % of water; ii) concentrating the extract under reduced pressure in the presence of at least an aqueous sodium chloride solution and eliminating the dark oil from the rest of the clear solution; iii) washing the residual aqueous solution by liquid-liquid extraction with n-hexane n-heptane or cyclohexane; iv) liquid-liquid extraction of the washed aqueous phase with ethyl acetate; v) washing the ethyl acetate phase obtained at step iv) with a sodium chloride solution then evaporating by dry process the washed ethyl acetate phase.
|
申请公布号 |
US2004109907(A1) |
申请公布日期 |
2004.06.10 |
申请号 |
US20030472408 |
申请日期 |
2003.09.17 |
申请人 |
TENG BENG POON |
发明人 |
TENG BENG POON |
分类号 |
A61K36/00;A61K36/16;A61P7/02;A61P9/00;A61P9/10;A61P9/14;A61P21/00;A61P25/00;A61P25/16;A61P25/28;A61P35/00;A61P43/00;(IPC1-7):A61K35/78 |
主分类号 |
A61K36/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|