Abstract
AbstractThe kinetics of the catalytic transformation of 3‐picoline to 3‐cyanopyridine by nitric oxide (NO) have been investigated over nickel oxide‐aluminium oxide catalyst (2NiO·Al2O3) in a differential flow reactor between 300 and 360°C. A maximum yield of 98% was achieved with a catalyst having a Ni: Al atomic ratio of 1:1 and preheated in the presence of air at 600°C for 24 h. The rate equation Rn = kpknPpPn/(kpPp + knPn) deduced, assuming a steady state involving a two‐stage irreversible oxidation‐reduction process, represented the data most satisfactorily for conversion of 3‐picoline to nicotinonitrile. A tentative mechanism for the reaction is proposed.
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