| Original document(7 pages) 中文版 |
This invention relates to a preparation technique of crude drugs, especially those with high purities, for pharmaceutical industry. The preparation technique of high-purity crude drugs scutellarin mentioned in this invention consists of following steps: a) breviscapine is placed in a vessel with the addition of water of more than twice the mass, and the pH value is adjusted to 4~8 for complete dissolution with alkaline solutions such as calcium hydroxide, calcium carbonate, potassium sodium hydrophosphate or organic bases; b) solvent of more than three times the mass is added at a temperature of 18~35 deg.C for precipitation and the mixture is laid aside and filtered, with the precipitates washed with solvent; c) the precipitates are transferred into a solution containing 10~60wt% solvent and acid is added to a pH value of 1~2 for precipitation. The mixture is then filtered and the precipitates are washed to neutrality, dried and finally collected as high-purity crude drugs scutellarin. |
Application Number
申请号 |
200410079642 |
Application Date
申请日 |
2004.12.27 |
| Title 名称 |
Technique for preparing pharmaceutical product of Denghuayisu in high purity
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Publication Number
公开号 |
1796397 |
Publication Date
公开日 |
2006.07.05 |
| Approval Pub. Date |
|
Granted Pub. Date |
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| International Classification 分类号 |
C07H17/07,C07H1/06,A61K31/7048,A61P9/00 |
Applicant(s) Name
申请人 |
Fan Xiane |
| Address 地址 |
650228 |
| Inventor(s) Name 发明人 |
Zhang Renwei, Cheng Huijia |
| Attorney & Agent 代理人 |
zhang yi |
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