Catalytic oxidation of organic substrates using alumina supported chromium and manganese

Abstract

Supported reagents prepared by adsorption of chromium(vi) and manganese(vi1) on alumina are capable of catalysing the aerial oxidation of organic substrates.

Selective Oxidation of Diphenylmethane Over Cobalt Doped Mesoporous Titania–Silica Catalyst with High Ti Content

“…The classical synthesis methods such as Friedel-Crafts acylation reactions [1][2][3][4][5] and the use of high oxidation state transition metals for diaryl methyl derivatives oxidation (e.g. CrO 3 , KMnO 4 ) [6][7][8] need critical conditions, and they are expensive, polluting, and risky. Therefore, more and more attention has been transferred to develop a more efficient, easily separable, reusable, and environmentfriendly catalyst for the oxidation of diphenylmethane (DPM) to BP [9][10][11][12].…”

Surface Chemistry and Spectroscopy of Chromium in Inorganic Oxides

“…Supported chromium catalysts have been used for the oxidation of benzophenone 22 (Cr/Al 2 O 3 ), diphenylmethane 22 (Cr/Al 2 O 3 ), ethanol 160 (Cr/SiO 2 ), and methanol. 61,62,67 The oxidation of methanol to formaldehyde was systematically investigated over a series of supported chromium oxide catalysts differing in support composition.…”

“…Other important catalytic activities are hydrogenation-dehydrogenation, oxidation, isomerization, aromatization, and DeNO x reactions. [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] The basis for the activity of Cr in such a wide spectrum of reactions lies in the variability of oxidation states, of coordination envi-ronments, and of degree of polymerization of Cr oxide species. This variability is especially pronounced on the surface.…”

Structural and Catalytic Properties of a Novel Vanadium Containing Solid Core Mesoporous Shell Silica Catalysts for Gas Phase Oxidation Reaction

“…Influence of various silanes were studied in similar conditions. Small angle X-ray diffraction analysis was carried out using Mac Science Co. Ltd., MO3XHF22 instrument in the [1][2][3][4][5][6][7][8][9][10][11][12] o region. The surface elemental analysis and particle size and shape were analyzed by a Leica Stereoscan -440 scanning electron microscope.…”

“…Since, Benzophenone is widely used as a constituent of synthetic perfumes and as a starting material for the manufacture of dyes, pesticides and drugs (especially anxiolytic and hypnotic drugs). Earlier, synthesis of Benzophenone is performed by the oxidation reaction of the Diphenylmethane using stoichiometric quantities of oxidizing agents like KMnO 4 or K 2 Cr 2 O 7 [2,3].…”