Key words: alkylbenzenes, partial oxidation, H-ZSM-5
Reactions of substituted benzenes — toluene, p-xylene, fluorobenzene, phenol, cumene and styrene — with nitrous oxide as an oxidant on H-ZSM-5 catalyst under supercritical conditions at 345—420°C and 70—150 atm was investigated.
It is shown that the products of disproportionation, isomerization and condensation that do not contain oxygen form predominantly. Only in the oxidation of toluene the selectivity to oxidation product (cresols) reaches up to 35 %. The yield of corresponding phenols in oxidation of alkyl-, hydroxy- and fluorobenzenes is negligible. Double bond conjugated with π-system of benzene rings (styrene), as well as the presence of branched alkyl substituents (in cumene) and hydroxyl-group (in phenol) hinder the formation of benzene ring oxidation products.