Environmentally friendly efficient one - pot electrochemical synthesis of 2,4 - dimethylanisole by selective oxidation of m - xylene in methanol with metals promoted sulfated zirconia / Fengtao Chen in Industrial & engineering chemistry research, Vol. 50 N° 24 (Décembre 2011)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 50 N° 24 (Décembre 2011) . - pp. 13650–13654 Titre : Environmentally friendly efficient one - pot electrochemical synthesis of 2,4 - dimethylanisole by selective oxidation of m - xylene in methanol with metals promoted sulfated zirconia Type de document : texte imprimé Auteurs : Fengtao Chen, Auteur ; Sanchuan Yu, Auteur ; Xiaoping Dong, Auteur Année de publication : 2012 Article en page(s) : pp. 13650–13654 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Electrochemical Oxidation Methanol Résumé : Herein, we reported the efficiently catalytic synthesis of 2,4-dimethylanisole with electrochemically selective oxidation of m-xylene in methanol under mild conditions. The catalysts of SO42–/M–ZrO2 (M = Mo, Cu, Fe, Co, and Cr), prepared by coprecipitation and postsynthesized sulfation, were characterized by means of Fourier transform infrared (FT-IR) spectroscopy and powder X-ray diffraction (XRD), which indicated that the modification of sulfates and the incorporation of metal ions would not influence the structure of zirconia and the doped metal ions were well dispersed. The electrochemical reaction process was monitored by UV–vis spectroscopy, and the distribution of the products was analyzed by gas chromatography–mass spectrometry (GC–MS). All catalysts exhibited excellent activity for the electrochemical reaction assisted by a pair of porous graphite plane electrodes. X-ray photoelectron spectroscopy (XPS) showed a mixture of Zr2+ and Zr4+ in the catalysts after the reaction, demonstrating the participation of catalyst in this redox reaction. The results revealed that a maximum yield of about 62.1% was achieved for 2,4-dimethylanisole in the SO42–/Mo–ZrO2 reaction system in 3 h. This method provides a new environmentally benign and simple way to synthesize 2,4-dimethylanisole. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200740p [article] Environmentally friendly efficient one - pot electrochemical synthesis of 2,4 - dimethylanisole by selective oxidation of m - xylene in methanol with metals promoted sulfated zirconia [texte imprimé] / Fengtao Chen, Auteur ; Sanchuan Yu, Auteur ; Xiaoping Dong, Auteur . - 2012 . - pp. 13650–13654. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 24 (Décembre 2011) . - pp. 13650–13654 Mots-clés : Electrochemical Oxidation Methanol Résumé : Herein, we reported the efficiently catalytic synthesis of 2,4-dimethylanisole with electrochemically selective oxidation of m-xylene in methanol under mild conditions. The catalysts of SO42–/M–ZrO2 (M = Mo, Cu, Fe, Co, and Cr), prepared by coprecipitation and postsynthesized sulfation, were characterized by means of Fourier transform infrared (FT-IR) spectroscopy and powder X-ray diffraction (XRD), which indicated that the modification of sulfates and the incorporation of metal ions would not influence the structure of zirconia and the doped metal ions were well dispersed. The electrochemical reaction process was monitored by UV–vis spectroscopy, and the distribution of the products was analyzed by gas chromatography–mass spectrometry (GC–MS). All catalysts exhibited excellent activity for the electrochemical reaction assisted by a pair of porous graphite plane electrodes. X-ray photoelectron spectroscopy (XPS) showed a mixture of Zr2+ and Zr4+ in the catalysts after the reaction, demonstrating the participation of catalyst in this redox reaction. The results revealed that a maximum yield of about 62.1% was achieved for 2,4-dimethylanisole in the SO42–/Mo–ZrO2 reaction system in 3 h. This method provides a new environmentally benign and simple way to synthesize 2,4-dimethylanisole. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200740p

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