发明授权
- 专利标题: Process for the recovery of pure hellebrin
- 专利标题(中): 回收纯赫尔林林的方法
-
申请号: US377251申请日: 1982-05-11
-
公开(公告)号: US4435563A公开(公告)日: 1984-03-06
- 发明人: Gerhard Oepen , Karl-Heinz Mangartz , Norbert Seifried , Jurgen Engel , Otto Isaac
- 申请人: Gerhard Oepen , Karl-Heinz Mangartz , Norbert Seifried , Jurgen Engel , Otto Isaac
- 申请人地址: DEX Frankfurt
- 专利权人: Degussa Aktiengesellschaft
- 当前专利权人: Degussa Aktiengesellschaft
- 当前专利权人地址: DEX Frankfurt
- 主分类号: C07H15/256
- IPC分类号: C07H15/256 ; A61K31/585 ; A61K36/71 ; C07J19/00
摘要:
There is provided a process for the recovery of pure hellebrin which comprises extracting a defatted hellebrin extract dissolved in a water-alkanol mixture or water-acetone mixture with a mixture of a lower alkanol or acetone and di-, tri-, or tetrachloromethane (or dichloroethane) evaporating the extraction agent in a vacuum and then heating with ethanol until the deposition of the first hellebrin crystals begins.
公开/授权文献
- US5022464A Condenser 公开/授权日:1991-06-11
信息查询
IPC分类: