Hydrogenation of o-chloronitrobenzene to o-chloroaniline over Pd/C in supercritical carbon dioxide

✍ Scribed by Chunyu Xi; Haiyang Cheng; Jianmin Hao; Shuxia Cai; Fengyu Zhao

• Book ID: 103834839
• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 288 KB
• Volume: 282
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/j.molcata.2007.11.027

✦ Synopsis

Hydrogenation of o-chloronitrobenzene (o-CNB) to o-chloroaniline (o-CAN) with Pd/C has been investigated in supercritical carbon dioxide (scCO 2 ) at 308 K. The influences of several parameters such as CO 2 , H 2 pressures, Pd metal particle size and reaction time have been discussed. CO 2 pressure presented markedly effects on the reaction rate and product selectivity under the reaction conditions used, the selectivity to o-CAN at CO 2 pressure from 8 to 13 MPa (supercritical region) was larger than that at CO 2 pressure below 6 MPa (subcritical region). Moreover, the larger selectivity to o-CAN was obtained in scCO 2 compared with that in ethanol.