| 发明名称 |
METHOD FOR PURIFYING DIACETYL RHEIN |
| 摘要 |
A method comprising the steps of (a) forming a suspension of diacetyl rhein in a mixture of an organic solvent and water; (b) adding a tertiary amine; (c) adding an alkali metal or alkaline-earth metal acid salt to the resulting solution; (d) performing hydrolysis in a weakly acidic medium; and (e) recovering the purified diacetyl rhein by filtration.
|
| 申请公布号 |
WO9624572(A1) |
申请公布日期 |
1996.08.15 |
| 申请号 |
WO1996IB00093 |
申请日期 |
1996.02.07 |
| 申请人 |
STEBA BEHEER B.V.;COHEN, AVRAHAM |
发明人 |
COHEN, AVRAHAM |
| 分类号 |
A61K36/48;A61K31/19;A61K31/22;A61K36/00;A61K36/896;A61P19/02;A61P43/00;C07C67/52;C07C67/60;C07C69/00;C07C69/16;(IPC1-7):C07C67/60 |
主分类号 |
A61K36/48 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
