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MgO-PbO catalyzed synthesis of diethylene glycol Bis(allyl carbonate) by transesterification route / Hualiang An in Industrial & engineering chemistry research, Vol. 50 N° 13 (Juillet 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 7740–7745 Titre : MgO-PbO catalyzed synthesis of diethylene glycol Bis(allyl carbonate) by transesterification route Type de document : texte imprimé Auteurs : Hualiang An, Auteur ; Zhuo Gao, Auteur ; Xinqiang Zhao, Auteur Année de publication : 2011 Article en page(s) : pp. 7740–7745 Note générale : Chimlie industrielle Langues : Anglais (eng) Mots-clés : Mixed  metal  oxides  Synthesis  of  diethylene Résumé : The catalytic performance of mixed metal oxides was evaluated for the synthesis of diethylene glycol bis(allyl carbonate) (ADC) by transesterification of diethylene glycol (DEG), dimethyl carbonate (DMC). and allyl alcohol (AAH), and MgO–PbO was found to show the highest catalytic activity. The influence of preparation conditions on the catalytic performance of MgO–PbO was studied and its suitable preparation conditions were as follows. A calcination process was used, with Mg(OH)2 and Pb(CH3COO)2·3H2O as precursors, molar ratio of Mg:Pb = 6:1, and calcination temperature of 650 °C. Under the following reaction conditions, molar ratio of DEG:DMC:AAH = 0.08:1:2, weight percentage of MgO–PbO = 1.5% of total weight of all reactants, 100 °C, 6 h, and vacuum of 0.08 MPa, the yield of ADC was 97.3%. Moreover, MgO–PbO showed a good recyclability; ADC yield of 95.4% could be achieved after the catalyst was reused for two times. The results of N2 adsorption–desorption measurement and XPS analyses for MgO–PbO indicate there exists an interaction between MgO and PbO, which promotes the catalytic performance and recyclability of MgO–PbO. Furthermore, the reaction pathway for ADC synthesis was elucidated by means of GC-MS analysis and experimental verification. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2003076 [article] MgO-PbO catalyzed synthesis of diethylene glycol Bis(allyl carbonate) by transesterification route [texte imprimé] / Hualiang An, Auteur ; Zhuo Gao, Auteur ; Xinqiang Zhao, Auteur . - 2011 . - pp. 7740–7745. Chimlie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 7740–7745 Mots-clés : Mixed  metal  oxides  Synthesis  of  diethylene Résumé : The catalytic performance of mixed metal oxides was evaluated for the synthesis of diethylene glycol bis(allyl carbonate) (ADC) by transesterification of diethylene glycol (DEG), dimethyl carbonate (DMC). and allyl alcohol (AAH), and MgO–PbO was found to show the highest catalytic activity. The influence of preparation conditions on the catalytic performance of MgO–PbO was studied and its suitable preparation conditions were as follows. A calcination process was used, with Mg(OH)2 and Pb(CH3COO)2·3H2O as precursors, molar ratio of Mg:Pb = 6:1, and calcination temperature of 650 °C. Under the following reaction conditions, molar ratio of DEG:DMC:AAH = 0.08:1:2, weight percentage of MgO–PbO = 1.5% of total weight of all reactants, 100 °C, 6 h, and vacuum of 0.08 MPa, the yield of ADC was 97.3%. Moreover, MgO–PbO showed a good recyclability; ADC yield of 95.4% could be achieved after the catalyst was reused for two times. The results of N2 adsorption–desorption measurement and XPS analyses for MgO–PbO indicate there exists an interaction between MgO and PbO, which promotes the catalytic performance and recyclability of MgO–PbO. Furthermore, the reaction pathway for ADC synthesis was elucidated by means of GC-MS analysis and experimental verification. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2003076