Hydroxylation of benzene over TS-PQ™ catalyst

Preparation of La0.7Ca0.3Mn0.95Fe0.05O3 perovskites by different methods: Catalytic activity towards the hydroxylation of benzene

“…H2O2 acts as the oxidant in the conversion of benzene to phenol. Thus, it is natural that no phenol is obtained in the absence of H2O2 [30]. The variation of phenol yield with the amount of H2O2 used gives the same tendency over the three catalysts used.…”

Cr(III)‐containing Fe3O4/mercaptopropanoic acid‐poly(2‐hydroxyethyl acrylate) nanocomposite: Highly active magnetic catalyst for direct hydroxylation of benzene

“…The influence of reaction temperature on the catalytic activity was investigated by several separate reactions under the same reaction conditions. As represented in Table , the reaction yield raised by increasing the temperature to 45°C and then it decreased at higher temperatures because of the spontaneous decomposition of H 2 O 2 to O 2 and H 2 O at high temperatures . Furthermore, it was seen that selectivity to phenol decreased with an increase in the reaction temperature because of the further oxidation of phenol at high temperatures.…”

Zeolite Confined Ti(OH)4 Nanoparticles in Highly Active and Selective Oxidation Catalyst

“…The most intense bands of these latter two samples are centered however in the 220-225 nm range. Despite the mentioned non-framework contaminations, such samples reportedly possess high catalytic activity, for example for the selective oxidation of alkanes [7][8][9], alkenes [16,17], benzene [14] and other reactants [1,15,36,37] by aqueous H 2 O 2 . The shoulders in samples #1 and #2 illustrate that the *225 nm UV band might appear also in the TS-1 catalysts but it is usually treated as tailing of the \213 nm band caused by some structural imperfections which do not influence catalyst activity and selectivity significantly.…”

“…It has been repeatedly noted, however, that for certain H 2 O 2 based oxidation processes some hydrophilic MFIstructured titanium silicate catalysts can be even more active and selective than TS-1 even without applying organic solvents [7][8][9][10][11][12][13][14]. The most intense UV absorption of such catalysts was found in the 213-233 nm (42500-47000 cm -1 ) range.…”