Phenol Hydroxylation Using Fe/Al-MCM-41 Catalysts

Phenol Hydroxylation Using Fe/Al-MCM-41 Catalysts

Fe loaded Al-MCM-41, (Si/Al = 25, 50, 75 and 100) catalysts were synthesized by hydrothermal method and characterized by the XRD, BET (surface area), FT-IR, and UV- vis and Mössbauer techniques. The liquid phase hydroxylation of phenol with hydrogen peroxide was studied and exclusive formation of di...

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Veröffentlicht in:Catalysis letters 2008, Vol.120 (1-2), p.56-64
Hauptverfasser: Esther Leena Preethi, M., Revathi, S., Sivakumar, T., Manikandan, D., Divakar, D., Valentine Rupa, A., Palanichami, M.
Format: Artikel
Sprache:eng
Schlagworte:
Aluminum
Catalysis
Catalysts
Chemical synthesis
Chemistry
Chemistry and Materials Science
Colloidal state and disperse state
Conversion
Exact sciences and technology
General and physical chemistry
Hydrogen peroxide
Hydroxylation
Industrial Chemistry/Chemical Engineering
Iron
Liquid phases
Organometallic Chemistry
Phenols
Physical Chemistry
Porous materials
Silicon
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Zusammenfassung:Fe loaded Al-MCM-41, (Si/Al = 25, 50, 75 and 100) catalysts were synthesized by hydrothermal method and characterized by the XRD, BET (surface area), FT-IR, and UV- vis and Mössbauer techniques. The liquid phase hydroxylation of phenol with hydrogen peroxide was studied and exclusive formation of dihydroxybenzene was observed. The phenol conversion was found to be almost same at various reaction temperatures viz 40, 60 and 80 °C, but at room temperature only about 30% conversion was recorded. The activity followed the order Fe/Al-MCM-41 (25) > Fe/Al-MCM-41(50) > Fe/Al-MCM-41 (75) > Fe/Al-MCM-41 (100) which was also the order of acidity. Effects of Fe content in Fe/Al-MCM-41 catalysts, solvent, phenol/H 2 O 2 mole ratio on phenol conversion was examined. The reaction was also carried out over 10% iron loaded mordenite and the results are compared.
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-007-9249-8