Catalysts for selective hydrogenation of aromatic nitrocompounds and hydrocarbons

U. N. Otzhan; A. K. Kurmansitova; L. R. Sassykova; A. A. Serikkanov; A. S. Kenzhebekov; E. B. Starikov

doi:10.26577/2218-7979-2016-9-2-40-44

Authors

U. N. Otzhan Al-Farabi Kazakh National University
A. K. Kurmansitova Al-Farabi Kazakh National University
L. R. Sassykova Al-Farabi Kazakh National University
A. A. Serikkanov Al-Farabi Kazakh National University
A. S. Kenzhebekov Al-Farabi Kazakh National University
E. B. Starikov Chalmers University of Technology

DOI:

https://doi.org/10.26577/2218-7979-2016-9-2-40-44

Abstract

The liquid-phase hydrogenation of nitrocompounds and aromatic hydrocarbons at the elevated pressure of hydrogen on the mono- and bimetallic supported catalysts was studied. The optimum
technological parameters of reactions for obtaining a high yield of target products were determined. It was shown that the mechanism of transforming aromatic nitro compounds – hydrogenation and it was identical for all solvents. It was studied the influence of the added hydrogenation reaction product (p-aminophenol) during p-nitrophenol hydrogenation for determination the cause of reducing of velocity of hydrogenation. It was revealed that the monometallic Rh/Al2O3 or bimetallic catalysts of Rh-Pt/Al2O3 composite are the most active catalysts for hydrogenation of aromatic hydrocarbons. The catalysts applied on aluminum oxide are more active and selective, than the catalysts applied on a silica gel.