The effect of dispersed oxides V2O5, TiO2, ZrO2 on rheology characteristic of V-Ti-Zr-catalysts and their catalytic properties in the oxidation of - β picoline
Influence of dispersion of oxides V2O5, TiO2, ZrO2 on durability of V-Ti-Zr of catalysts is studied. It is shown that the disperse structure of initial components of V-Ti-Zr-oxide catalysts defines dispersion of the ready catalyst that influences its catalytic properties. It is possible to increase dispersion of the catalyst by replacement of oxides of vanadium and titan by metavanadate ammonium and metatitanic acid. The optimum quantitative ratio of initial components of the catalyst is defined. The mass ratio of initial compounds for the catalyst synthesis equal to 1:4:8 for NH4V03:H2Ti03:Zr02 (in terms of oxides V, Ti and Zr), provides receiving enough strong granules. It is shown that this structure of the catalyst possesses the greatest selectivity in oxidation 3-methylpyridin to nicotinic acid (83%).
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