发明授权
US4741867A Process for the preparation of 1-amino-2-bromo-4-hydroxyanthraquinone
失效
制备1-氨基-2-溴-4-羟基蒽醌的方法
- 专利标题: Process for the preparation of 1-amino-2-bromo-4-hydroxyanthraquinone
- 专利标题(中): 制备1-氨基-2-溴-4-羟基蒽醌的方法
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申请号: US698988申请日: 1985-02-07
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公开(公告)号: US4741867A公开(公告)日: 1988-05-03
- 发明人: Helmut Dittmer , Jurgen Schneider , Hubert Schonhagen , Claus Krugermann
- 申请人: Helmut Dittmer , Jurgen Schneider , Hubert Schonhagen , Claus Krugermann
- 申请人地址: DEX Leverkusen
- 专利权人: Bayer Aktiengesellschaft
- 当前专利权人: Bayer Aktiengesellschaft
- 当前专利权人地址: DEX Leverkusen
- 优先权: DEX3415917 19840428
- 主分类号: C09B1/503
- IPC分类号: C09B1/503 ; C07C225/36 ; C09B1/50 ; C07C97/26
摘要:
1-Amino-2-bromo-4-hydroxyanthraquinone is obtained in good yields and in an environmentally acceptable manner by bromination of 1-aminoanthraquinone in 2 to 5 times the quantity by weight of 80 to 98% strength sulphuric acid and using 1.1-1.5 mole of bromine under elevated pressure.
公开/授权文献
- US5731766A Route guide system and method 公开/授权日:1998-03-24
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