01530nas a2200205   4500008004100000022001400041245013800055210006900193260007100262300001400333490000700347520069300354100002801047700002501075700002401100700002301124700002101147700002901168856012701197       2011                        eng d  a0888-588500aControl of competing hydrogenation of phenylhydroxylamine to aniline in a single-step hydrogenation of nitrobenzene to p-aminophenol	0 aControl of competing hydrogenation of phenylhydroxylamine to ani  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcMAY  a5478-54840 v503 a<p>Two steps involving catalytic hydrogenation of nitrobenzene to phenylhydroxylamine (PHA) in acid medium and its rearrangement to p-aminophenol (PAP) were studied separately in a batch reactor, using a well-characterized 3% Pt/C catalyst. The first step of hydrogenation of nitrobenzene to PHA could be carried out at 303 K and a H(2) pressure of 0.69 MPa with complete conversion of nitrobenzene, while the achieved selectivity to PHA was higher than 90% with some formation of aniline, even at lower temperature. The second step of PHA rearrangement to PAP could be achieved under a hydrogen atmosphere at elevated temperature of 353 K to give a maximum selectivity to PAP of 74%.</p>1 aNadgeri, Jayprakash, M.1 aBiradar, Narayan, S.1 aPatil, Priyanka, B.1 aJadkar, Sachin, T.1 aGarade, Ajit, C.1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/control-competing-hydrogenation-phenylhydroxylamine-aniline-single-step-hydrogenation-0