Abstract
Modification of V2O5 with Ti, Sn, Zr, Nb, and Al oxides improves the activity and selectivity of the vanadium oxide catalyst in vapor-phase oxidation of β-picoline to give nicotinic acid. It is shown that the conversion of β-picoline and the yield of nicotinic acid on two-component V2O5-TiO2, V2O5-SnO2, V2O5-ZtrO2, V2O5-Nb2O5, and V2O5-Al2O3 catalysts may be several times those on the V2O5 catalyst. It was found that, on passing from V2O5 to double-component vanadium-containing catalysts, the proton affinity of active oxygen bonded to vanadium, calculated by the quantum-chemical method, grows simultaneously with the increase in the activity of the catalysts in the oxidation reaction.
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