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Direct oxidative esterification of aldehyde with alcohol to ester over Pd / styrene - divinyl benzene copolymer catalyst / Baohe Wang in Industrial & engineering chemistry research, Vol. 51 N° 10 (Mars 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 10 (Mars 2012) . - pp. 3932–3938 Titre : Direct oxidative esterification of aldehyde with alcohol to ester over Pd / styrene - divinyl benzene copolymer catalyst Type de document : texte imprimé Auteurs : Baohe Wang, Auteur ; Weili Ran, Auteur ; Wenjuan Sun, Auteur Année de publication : 2012 Article en page(s) : pp. 3932–3938 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Oxidative  esterification  Catalyst Résumé : The direct oxidative esterification of methacrolein (MAL) with methanol in the presence of molecular O2 at low temperature and ambient pressure to methyl methacrylate (MMA) was carried out over a novel hydrophobic styrene-divinyl benzene copolymer (SDB) supported palladium catalyst, and the results were compared with conventional hydrophilic catalysts over SiO2 and γ-Al2O3. Among the catalysts studied, SDB supported palladium catalyst showed higher activity than the conventional catalysts. The Pd/SDB catalyst was characterized by X-ray powder diffraction (XRD), environmental scanning electron microscope (ESEM), and thermal gravimetric analysis (TGA). A systematic investigation was carried out for the oxidative esterification of MAL with methanol over SDB supported catalyst. The effects of catalyst loading and alcohol/aldehyde molar ratio were studied. The reaction kinetics was studied, and the result showed that the fitting results agreed well with the experimental data. On the basis of the Langmuir–Hinshelwood adsorption model, the probable mechanism was suggested. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202701k [article] Direct oxidative esterification of aldehyde with alcohol to ester over Pd / styrene - divinyl benzene copolymer catalyst [texte imprimé] / Baohe Wang, Auteur ; Weili Ran, Auteur ; Wenjuan Sun, Auteur . - 2012 . - pp. 3932–3938. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 10 (Mars 2012) . - pp. 3932–3938 Mots-clés : Oxidative  esterification  Catalyst Résumé : The direct oxidative esterification of methacrolein (MAL) with methanol in the presence of molecular O2 at low temperature and ambient pressure to methyl methacrylate (MMA) was carried out over a novel hydrophobic styrene-divinyl benzene copolymer (SDB) supported palladium catalyst, and the results were compared with conventional hydrophilic catalysts over SiO2 and γ-Al2O3. Among the catalysts studied, SDB supported palladium catalyst showed higher activity than the conventional catalysts. The Pd/SDB catalyst was characterized by X-ray powder diffraction (XRD), environmental scanning electron microscope (ESEM), and thermal gravimetric analysis (TGA). A systematic investigation was carried out for the oxidative esterification of MAL with methanol over SDB supported catalyst. The effects of catalyst loading and alcohol/aldehyde molar ratio were studied. The reaction kinetics was studied, and the result showed that the fitting results agreed well with the experimental data. On the basis of the Langmuir–Hinshelwood adsorption model, the probable mechanism was suggested. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202701k