Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Patent
1982-01-29
1983-11-15
Doll, John
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
564112, 564300, C07C 8511, C07C 8900
Patent
active
044157533
ABSTRACT:
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.degree.-40.degree. C., thereby reducing the substrate to an unsubstituted or alkyl substituted phenylhydroxylamine. The hydroxylamine is thereafter heated to a temperature of at least 70.degree. C. and agitated at at least 70.degree. C. in the presence of a highly dissociated acid, thereby effecting rearrangement of the hydroxylamine to the corresponding p-aminophenol.
REFERENCES:
patent: 3383416 (1968-05-01), Benner
patent: 3694509 (1972-09-01), Rylander et al.
patent: 3715397 (1973-02-01), Rylander et al.
patent: 4176138 (1979-11-01), Sathe
patent: 4307249 (1981-12-01), Derrenbacker
Caskey Douglas C.
Chapman Douglas W.
Doll John
Mallinckrodt Inc.
LandOfFree
Process for preparing p-aminophenol and alkyl substituted p-amin does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for preparing p-aminophenol and alkyl substituted p-amin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing p-aminophenol and alkyl substituted p-amin will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-160582