Study of cumene oxidation over zirconia-, titania- and alumina-based complex oxides obtained by sol-gel methods: activity-structure relationships

Co and Mn impregnated MCM-41: their applications to vapour phase oxidation of isopropylbenzene

“…They obtained the selectivity to cumene hydroperoxide 63%, but the conversion reported was only 6% under liquid phase reaction at 353 K. Kropf's et al claimed that below 100 • C oxygen activation step responsible for the catalysis of cumene oxidation by metal-phthalocyanines via Kropf's mechanism [11][12][13]. Maksimov et al dealt with low temperature cumene oxidation over the surfaces of Fe-O/ZrO 2 , Fe-O/TiO 2 and Fe-O/Al 2 O 3 complex oxides by sol-gel methods, and obtained poor (10-12%) cumene conversion and selectivity to cumene hydroperoxide (13%) [14]. In spite of the excellent performance of these catalysts, there are some drawbacks.…”

Selective Aerobic Oxidation of Cumene to Cumene Hydroperoxide over Mono- and Bimetallic Trimesate Metal–Organic Frameworks Prepared by a Facile “Green” Aqueous Synthesis

“…Therefore, in order to increase the CHP productivity, while maintaining the excellent selectivity to CHP, different catalysts have been proposed, either homogeneous or heterogeneous, mainly based on transition metal salts and oxides. [13][14][15][16][17][18][19][20][21] We and others have shown that several Metal-Organic frameworks (MOFs) can be used for the aerobic oxidation (i.e., using only air or oxygen as the oxidant) of activated alkanes, such as tetralin, 22 cyclooctane, 23 indane, 24 and various alkylbenzenes, 25 including cumene. Alternatively, MOFs can also be used as hosts in which other active species, such as metallo-phthalocyanines 26 or metal-oxide nanoparticles.…”

Nanoclusters and nanocluster systems. Assembling, interactions and properties

“…Systems consisting of zirconium, titanium or aluminium alkoxides [Zr(OPr i ) 4 , Ti(OBu i ) 4 , Al(OPr i ) 3 ] and iron or cobalt complexes are fairly promising. 140 Based on them, supported catalysts represented by nanocluster systems have been prepared, for example, FeO/ZrO 2 , FeO/TiO 2 , FeO/Al 2 O 3 . The cluster size was varied by changing the concentrations of components and the heating temperatures.…”