发明名称 |
Process for preparing 4-aminodiphenylamines |
摘要 |
A process for preparing an optionally substituted 4-aminodiphenylamine comprising reacting an optionally substituted aniline and an optionally substituted nitrobenzene in the presence of water and a base while controlling the water content so as to ensure a molar ratio of water to the base charged of not less than about 4:1 at the start of the coupling reaction and not less than about 0.6:1 at the end of the coupling reaction to produce 4-nitrodiphenylamine and/or 4-nitrosodiphenylamine and/or salts thereof. The coupling reaction is followed by a hydrogenation reaction where the coupling reaction product is hydrogenated in the presence of a hydrogenation catalyst and added water so as to ensure a molar ratio of total water to base of at least about 4:1 at the end of hydrogenation. Aqueous and organic phases are obtained and the optionally substituted 4-aminodiphenylamine recovered from the organic phase. |
申请公布号 |
AU3994299(A) |
申请公布日期 |
1999.12.06 |
申请号 |
AU19990039942 |
申请日期 |
1999.05.14 |
申请人 |
FLEXSYS AMERICA L.P. |
发明人 |
ROGER KERANEN RAINS;RALPH ALBERT GENETTI;EDWARD ALBERT LAMBERS;ANTONIUS JOHANNES VAN HENGSTUM |
分类号 |
C07B61/00;C07C209/02;C07C209/36;C07C209/38;C07C211/51;C07C211/54 |
主分类号 |
C07B61/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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