L. Makedonski et al., Study of the selectivity of a V2O5-ZrO2 catalyst for partial oxidation of o-xylene at high temperatures, REACT KIN C, 66(2), 1999, pp. 237-243
It has been established that at high temperatures (above 450 degrees C) the
V2O5-ZrO2 catalyst exhibits a higher selectivity in the oxidation of o-xyl
ene to phthalic anhydride than does the conventional V2O5-TiO2(a) catalyst.
The catalyst selectivity is found to increase with respect to partial oxid
ation of o-xylene, the valuable by-product maleic anhydride being obtained.
Studies by different physicochemical methods have shown that V2O5-ZrO2 und
ergoes no significant phase and structural changes under high-temperature c
onditions.