| Abstrakt: |
Modification of VO 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 VO-TiO, VO-SnO, VO-ZtrO, VO-NbO, and VO-AlO catalysts may be several times those on the VO catalyst. It was found that, on passing from VO 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. [ABSTRACT FROM AUTHOR] |
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