发明名称 |
Process for preparing p-aminophenol and alkyl substituted p-aminophenol |
摘要 |
A process for the production of unsubstituted and lower alkyl substituted p-aminophenols. A charge mixture is prepared comprising an unsubstituted or lower alkyl substituted nitrobenzene substrate, a platinum catalyst and a sulfur compound. The sulfur compound may be a divalent sulfur compound in which sulfur is bonded to two other moieties or a compound reducible to such sulfur compound under catalytic hydrogenation conditions. Hydrogen is introduced into the mixture while it is agitated at a temperature of 0 DEG -40 DEG C., thereby reducing the substrate to an unsubstituted or alkyl substituted phenylhydroxylamine. The hydroxylamine is thereafter heated to a temperature of at least 70 DEG C. and agitated at at least 70 DEG C. in the presence of a highly dissociated acid, thereby effecting rearrangement of the hydroxylamine to the corresponding p-aminophenol.
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申请公布号 |
US4415753(A) |
申请公布日期 |
1983.11.15 |
申请号 |
US19820343993 |
申请日期 |
1982.01.29 |
申请人 |
MALLINCKRODT, INC. |
发明人 |
CASKEY, DOUGLAS C.;CHAPMAN, DOUGLAS W. |
分类号 |
C07B61/00;B01J23/00;C07C67/00;C07C213/00;C07C215/76;(IPC1-7):C07C85/11;C07C89/00 |
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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