Gas-phase oxygen oxidations of alkylaromatics over chemical vapor deposited Fe/Mo/borosilicate molecular sieve, Fe/Mo/DBH.

Characterization and catalytic activity of cobalt containing MCM-41 prepared by direct hydrothermal, grafting and immobilization methods

“…Therefore there is a need for the development of new heterogeneous catalytic process for the synthesis of aromatic aldehydes and ketones. Vanadium and molybdenum based catalysts have been widely studied for the side chain oxidation of alkyl aromatics [20][21][22][23][24][25][26]. Besides this iron based catalyst was studied for the selective oxidation of alkyl aromatics but the success is very limited [27,28].…”

1H and 29Si-MAS NMR characterization of silicate fiberglass supports

“…One way of modifi-cation consists in mineral acid treatment of the initial silica with a significant content of alkali-earth metal oxides. 27 Full extraction of the alkali-earth metal component results in the appearance of framework microporosity.…”

Preparation of Oxide, Sulfide and Other Chalcogenide Clusters in Molecular Sieves

“…Some larger particles (>50 nm) were also observed on the external surface of the support. By energy dispersive X-ray emission the particles were shown to consist of Fe 2 (MoO 4 ) 3 and FeMoO 4 [226,231]. Only slight destruction of the molecular sieve support was observed, whereas silicalite-1 and H-ZSM-5 were more severely damaged by the CVD treatment.…”

“…Yoo and co-workers presented a preparation method for special oxidation catalysts by introduction of iron and molybdenum into molecular sieves via CVD [225][226][227][228][229][230][231]. This method was later adopted by Centi et al [232].…”

“…The surface species and part of the MoO 3 were sublimed out of the sample by prolonged calcination at 650-690°C. This led to a selective catalyst for the partial oxidation of p-xylene to terephthaldehyde, however, only if DBH was used as support [225,226,231]. High-resolution transmission electron images of a fresh CVD sample revealed a fine deposition of iron and molybdenum in rod-like shaped domains with diameters ranging from 1-10 nm along the micropore channels of the support.…”