Ni/γ-Al₂O₃ catalyzed hydrogenation of mixed nitroaniline and m-nitrochlorobenzene

Ni/γ-Al 2 O 3 catalysts can effectively improve the selectivity during the hydrogenation of mixed nitroaniline and m-nitrochlorobenzene and can inhibit the dechlorination phenomenon. In this paper, different crystal types of Ni/Al 2 O 3 were prepared, and the carrier surface morphology, crystal structure, specific surface area, and pore volume and pore size of the catalysts were characterized by SEM, BET, XRD, etc. The prepared catalysts were used for the catalytic hydrogenation for the synthesis of o- and p-phenylenediamine and m-chloroaniline, and by comparing the catalysts with the nickel catalysts with a skeleton, we obtained better catalytic performance and inhibition of dechlorination for the catalysts of Ni/γ-Al 2 O 3 .