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Citation: SUN Yu, LÜ Chun-Xu, HU An-Jun, LI Bin-Dong. Catalytic Hydrogenation of Chloronitrobenzenes to Prepare Chloroanilines over Water-Soluble Nickel Nanoparticle[J]. Chinese Journal of Applied Chemistry, ;2007, 24(4): 483-485. shu

Catalytic Hydrogenation of Chloronitrobenzenes to Prepare Chloroanilines over Water-Soluble Nickel Nanoparticle

1.
School of Chemistry, Nanjing University of Science and Technology, Nanjing 210094

Corresponding author: LÜ Chun-Xu,
Received Date: 9 June 2006
Available Online: 15 August 2006

The water-soluble nickel nanoparticle catalyst was prepared with KBH₄ as reducer and cetyl trimethyl ammonium bromide as stabilizer in aqueous solution.As is shown in the TEM and XRD results,the particle size of the catalyst is 4~6 nm and it has an amorphous structure.The catalyst was applied to the hydrogenation of o-chloronitrobenzene under very mild reaction conditions and the amount of the catalyst used in the reaction was small.The activity of the catalyst is higher than those of Raney Ni and Ni-B amorphous powder.At room temperature(25℃) and under 3.0 MPa of hydrogen,after 15 min reaction,o-CNB was all converted with a selectivity of o-CAN of 97.2%.The present catalysis system used water as solvent,and the products were easy to be obtained by simple phase separation.The results of the catalytic hydrogenation of different chloronitrobenzenes show that the catalyst exhibits a high activity and a high selectivity.For different chloronitrobenzenes,when the conversions of the substrates are higher than 99.5%,the corresponding selectivities of different chloroanilines are higher than 97.2%,which suggests that the catalyst has a wide application range.
- water soluble nickel nanoparticle,
- catalytic hydrogenation,
- chloronitrobenzene,
- chloroaniline
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