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Titolo:
Liquid-phase oxidation of benzene to phenol by CuO-Al2O3 catalysts prepared by co-precipitation method
Autore:
Miyahara, T; Kanzaki, H; Hamada, R; Kuroiwa, S; Nishiyama, S; Tsuruya, S;
Indirizzi:
Kobe Univ, Dept Sci & Chem Engn, Fac Engn, Kobe, Hyogo 6578501, Japan KobeUniv Kobe Hyogo Japan 6578501 , Fac Engn, Kobe, Hyogo 6578501, Japan Kobe Univ, Grad Sch Sci & Technol, Div Mol Sci, Kobe, Hyogo 6578501, JapanKobe Univ Kobe Hyogo Japan 6578501 iv Mol Sci, Kobe, Hyogo 6578501, Japan
Titolo Testata:
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
fascicolo: 1-2, volume: 176, anno: 2001,
pagine: 141 - 150
SICI:
1381-1169(20011120)176:1-2<141:LOOBTP>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOLECULAR-OXYGEN; HYDROGEN-PEROXIDE; NITROUS-OXIDE; HYDROXYLATION; ACID;
Keywords:
benzene oxidation; phenol; CuO-Al2O3; ascorbic acid; H2O2; supported Cu catalysts; acetic acid;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Tsuruya, S Kobe Univ, Dept Sci & Chem Engn, Fac Engn, Kobe, Hyogo 6578501,Japan Kobe Univ Kobe Hyogo Japan 6578501 Kobe, Hyogo 6578501, Japan
Citazione:
T. Miyahara et al., "Liquid-phase oxidation of benzene to phenol by CuO-Al2O3 catalysts prepared by co-precipitation method", J MOL CAT A, 176(1-2), 2001, pp. 141-150

Abstract

The liquid-phase catalytic oxidation of benzene to directly produce phenolwas attempted under mild reaction conditions using supported Cu catalysts in aqueous acetic acid solvent. Gaseous oxygen and ascorbic acid were used as an oxidant and a reductant, respectively. Among the supported Cu catalysts studied, the Cu catalysts prepared by the impregnation method, irrespective of the oxide supports, the Cu species were considerably leached during the benzene oxidation. A supported Cu catalyst (CuO-Al2O3) prepared by co-precipitation of Cu(NO3)(2).3H(2)O and Al(NO3)(2).3H(2)O inhibited the leaching of Cu species in comparison with the Cu catalysts supported by the impregnation method on Al2O3, SiO2, MCM-41, etc. The influences of the amount of supported Cu, the partial pressure Of O-2, the amount of ascorbic acid, the concentration of acetic acid in the solvent, and the reaction temperature on the phenol yield were investigated using the CuO-Al2O3 catalyst. The aqueous solvent including high concentration of acetic acid (around 80 vol.%) dramatically inhibited the leaching of Cu species in the CuO-Al2O3 catalyst. H2O2, which is considered to play an important role in phenol formation, was detected during the benzene oxidation catalyzed by CuO-Al2O3. (C) 2001 Elsevier Science BN. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 20:19:19