发明授权
US4154747A Production of virtually pure 1-amino-8-nitro-4,5-dihydroxyanthraquinone
失效
生产几乎纯的1-氨基-8-硝基-4,5-二羟基蒽醌
- 专利标题： Production of virtually pure 1-amino-8-nitro-4,5-dihydroxyanthraquinone
- 专利标题（中）： 生产几乎纯的1-氨基-8-硝基-4,5-二羟基蒽醌
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申请号： US917252申请日： 1978-06-20
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公开(公告)号： US4154747A公开(公告)日： 1979-05-15
- 发明人: Gerhard Epple , Wolfgang Elser , Walter Himmele
- 申请人： Gerhard Epple , Wolfgang Elser , Walter Himmele
- 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： DEX2730720 19770707
- 主分类号： C07C225/36
- IPC分类号： C07C225/36
摘要：
A process for the preparation of 1-amino-8-nitro-4,5-dihydroxyanthraquinone by partially reducing the corresponding dinitrohydroxyanthraquinone and isolating the reduction product, in which crude 1,8-dinitro-4,5-dihydroxyanthraquinone obtained by nitrating 4,5-dihydroxyanthraquinone is partially reduced in a phenol-water mixture, which contains from 5 to 50% by weight of water, in the presence of an alkali metal phenolate, by means of a reductone, reductonate or a mixture of these. The product is virtually free from by-products and is suitable for use for the synthesis of dyes.
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