Russian Journal of Physical Chemistry A

, Volume 92, Issue 4, pp 669–673 | Cite as

Concentration Effects in the Hydrogenation of 4-Nitro-2′-Hydroxy-5′-Methylazobenzene over Skeletal Nickel in an Aqueous 2-Propanol Solution

  • Hoang Anh
  • M. P. Nemtseva
  • O. V. Lefedova
Chemical Kinetics and Catalysis


The kinetics of hydrogenation of 4-nitro-2′-hydroxy-5′-methylazobenzene in aqueous 2-propanol solution over the skeletal nickel is investigated at different initial concentrations. It is established that the hydrogenation of 4-nitro-2′-hydroxy-5′-methylazobenzene over a skeletal nickel in azeotropic aqueous 2-propanol solution proceeds via two parallel pathways at both low and high initial concentrations. It is shown that increasing the initial concentration of the hydrogenated compound above its level of solubility raises the rate of azo group transformation in 4-nitro-2′-hydroxy-5′-methylazobenzene, while the content of 4-amino-2′- hydroxy-5′-methylazobenzene does not change in the hydrogenate and is not accumulated in the bulk of solution.


4-nitro-2′-hydroxy-5′-methylazobenzene skeletal nickel 2-propanol kinetic curves rate rate constant reaction selectivity 


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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  1. 1.Ivanovo State University of Chemical TechnologyIvanovoRussia

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