发明授权
US07329748B2 Method for the production of riboflavin of modification b/c in granular form
失效
用于生产颗粒形式的改性b / c的核黄素的方法
- 专利标题： Method for the production of riboflavin of modification b/c in granular form
- 专利标题（中）： 用于生产颗粒形式的改性b / c的核黄素的方法
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申请号： US10552137申请日： 2004-04-07
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公开(公告)号： US07329748B2公开(公告)日： 2008-02-12
- 发明人: Dirk Franke , Friedrich Hill , Christoph Martin , Thomas Knebel
- 申请人： Dirk Franke , Friedrich Hill , Christoph Martin , Thomas Knebel
- 申请人地址： DE
- 专利权人： BASF Aktiengesellschaft
- 当前专利权人： BASF Aktiengesellschaft
- 当前专利权人地址： DE
- 代理机构： Connolly Bove Lodge & Hutz LLP
- 优先权： DE10317051 20030411
- 国际申请： PCT/EP2004/003689 WO 20040407
- 国际公布： WO2004/089889 WO 20041021
- 主分类号： C07D487/04
- IPC分类号： C07D487/04
摘要：
The present invention relates to an improved process for preparing riboflavin of the B/C modification in granule form. Furthermore, the invention relates to the riboflavin preparation process wherein riboflavin of the A modification is (a) dissolved in aqueous mineral acid without treating the resulting riboflavin solution with activated carbon, (b) precipitated directly afterwards, steps (a) and (b) being carried out at a temperature in the range from 5 to 15° C., and (c) dried by fluidized bed granulation; and wherein the riboflavin does not come into contact with the aqueous mineral acid solvent for longer than on average 4 hours.
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