A. Martin et al., Permanent blockade of in situ-generated acid Bronsted sites of vanadyl pyrophosphate catalysts by pyridine during the partial oxidation of toluene, CHEM COMMUN, (13), 1999, pp. 1169-1170
The permanent blockade of in situ-formed Bronsted-acid OH groups and an eff
ective lowering of the catalyst acidity during the partial oxidation of tol
uene to benzaldehyde is demonstrated by an efficient method using a continu
ous dosing of pyridine to the feed that leads to drastically increased alde
hyde selectivities.