Hydrogenation of Chloronitrobenzene to Chloroaniline in Supercritical Carbon Dioxide

摘要

Hydrogenation of 2-chloronitrobenzene (CNB) to the corresponding 2-Chloroaniline (CAN) with Pd/C has been investigated in supercritical carbon dioxide (scCO{sub}2) and in ethanol at 308 K. Selectivity of CAN in scCO{sub}2 is higher than that in ethanol for that the hydro-dehalogenation was retarded in scCO{sub}2. The influences of several parameters such as H{sub}2 pressure, CO{sub}2 pressure and reaction time have also been discussed.