INVESTIGATION OF SELECTIVE HYDROGENATION OF AROMATIC NITROCOMPOUNDS AND HYDROCARBONS

The liquid-phase hydrogenation of NO2-group in nitro compounds and hydrogenation of aromatic hydrocarbons (benzene, ethylbenzene, toluene) at the elevated pressure of hydrogen had been studied. In the work the high-active mono- and bimetallic catalytic systems on various carriers were synthesized. The active phase of catalysts was based on platinum metals and copper. The optimum technological conditions of processes were determined. The mechanism of aromatic nitro compounds transformation was hydrogenation and identical for all used solvents. It was shown that monometallic Rh/Al2O3 or bimetallic catalysts of Rh-Pt/Al2O3 compositions were the most effective catalysts for hydrogenation of aromatic hydrocarbons. The catalysts supported on aluminum oxide are more active and selective, than the catalysts on silica. GLC analysis and IR spectroscopy data showed the high yields of the target products (up to 98-99%). Samples of the synthesized catalysts had been studied by a complex of physical and chemical research techniques.