发明授权
- 专利标题: Purification of indigo
- 专利标题(中): 靛蓝的净化
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申请号: US326851申请日: 1994-10-21
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公开(公告)号: US5536842A公开(公告)日: 1996-07-16
- 发明人: Udo Bergmann , Manfred Gang , Reinhold Kohlhaupt
- 申请人: Udo Bergmann , Manfred Gang , Reinhold Kohlhaupt
- 申请人地址: DEX Ludwigshafen
- 专利权人: BASF Aktiengesellschaft
- 当前专利权人: BASF Aktiengesellschaft
- 当前专利权人地址: DEX Ludwigshafen
- 优先权: DEX4336032.7 19931022
- 主分类号: C07D209/36
- IPC分类号: C07D209/36 ; C09B7/00 ; C09B7/02 ; C09B67/54 ; C07D403/04
摘要:
A process for purifying indigo comprises extracting an aqueous leuco indigo alkali metal salt solution with an inert solvent under oxygen-excluding conditions and conventionally regenerating the indigo by oxidation.
公开/授权文献
- US4449937A Dental anchor 公开/授权日:1984-05-22
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