Hydrogenation Properties of Chloronitrobenzene over Catalysts with M=Cr, Mn, Fe, Co, Ni, Cu

摘要

Haloamine is important intermediates for synthesis of organic fine chemicals, such as dyes, drugs, herbicides and pesticides. The traditional synthesis routes are usually harmful for environment. Selective hydrogenation route has received much attention, owing to its lower impact on the environment. However, the process is difficult because of extensive dehalogenation during the catalytic reduction of the compound. The catalytic reaction has been well-studied over many metallic catalysts. Platinum-based catalysts have received much attention for minimizing dehalogenation combined with a fast rate of nitro-group reduction. Special additives (promoters and inhibitors) or modified preparations of platinum catalyst were also used to improve the hydrogenation selectivity, but none of the catalysts previously proposed are completely satisfactory, each having its own particular limitations.