Catalytic effects on the oxidation of benzyl alcohol by montmorillonite-supported metal nitrates

Cseri, T; Bekassy, S [Békássy, Sándor (Szerves kémia, Ka...), author] Department of Organic Chemical Technolgy (BUTE / VEK); Figueras, F

English Scientific Article (Journal Article)
Published: BULLETIN DE LA SOCIETE CHIMIQUE DE FRANCE 0037-8968 133 (6) pp. 547-552 1996
      Iron(III) and copper(II) nitrates supported on K10 montmorillonite (Clayfen and Claycop) were prepared by impregnation. The metal nitrates were present on the support as crystalline hydrates, which were X-ray amorphous and had good dispersion. These supported metal nitrates were used as reagents for the oxidation of benzyl alcohol. Due to its high Bronsted acidity the clay support catalyzes the decomposition of finely dispersed nitrates which is the intermediate step of the chemical oxidation of the alcohol. The oxidation activity of these supported reagents depends on the oxygen content in the reactor gas atmosphere. Under an oxygen atmosphere metal nitrates can be used in a quantity less then stoichiometric. When the metal nitrate content is decreased at the surface of montmorillonite, part of the surface becomes free. In that case, with aromatic solvents, alkylation arises as a secondary reaction.
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      2021-03-03 10:23