Investigation of montmorillonite-based clays in the preparation of supported ferric nitrate

Bekassy, S [Békássy, Sándor (Szerves kémia, Ka...), szerző] Budapesti Műszaki Egyetem; Cseri, T; Bodas, Z; Figueras, F

Angol nyelvű Tudományos Szakcikk (Folyóiratcikk)
Megjelent: NEW JOURNAL OF CHEMISTRY 1144-0546 1369-9261 20 (3) pp. 357-364 1996
    Azonosítók
    Szakterületek:
      A series of montmorillonite-based clays (KSF, KSF/0, K0, KP10, K10, KS from Sud-Chemie) were obtained by treating a Bavarian bentonite with different acids and a Hungarian bentonite (Mgd), and were used for the preparation of supported hydrated iron(III) nitrates. The clay supports were characterized by different methods (chemical analysis, nitrogen adsorption, X-ray powder diffraction, thermal analysis and solid-state NMR) and the acidity of these solids was determined by infrared spectroscopy using pyridine as a molecular probe. The supported iron nitrate reagents were investigated by thermal and X-ray powder diffraction methods. The iron nitrate is present on the support as an amorphous hydrate. The decomposition of the nitrate is shifted towards lower temperature when it is supported and starts at 35-40 degrees C. The supported iron nitrate reagents show high activities and selectivities in the oxidation of benzyl alcohol to benzaldehyde. The high specific surface area and the Bronsted acidity of the support are determining factors for the chemical activity of the supported system. The supported reagents prepared according this procedure can be stocked for as long as six months without any loss of chemical properties.
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      2021-01-22 17:14