Selective hydrogenation of nitrobenzene to aniline in dense phase carbon diox…

Abstract. The selective hydrogenation of nitrobenzene (NB) over Ni/y-Al2O3 catalysts was investigated using different media of dense phase CO2, ethanol, and n-hexane. In dense phase CO2, the total rate of NB hydrogenation was larger than that in organic solvents under similar reaction conditions; the selectivity to the desired product, aniline, was almost 100% over the whole conversion rang…