Calcined, rare earth modified hydrotalcite as a solid, reusable catalyst for dimethyl carbonate synthesis / P. Unnikrishnan in Industrial & engineering chemistry research, Vol. 51 N° 18 (Mai 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 18 (Mai 2012) . - pp. 6356-6363 Titre : Calcined, rare earth modified hydrotalcite as a solid, reusable catalyst for dimethyl carbonate synthesis Type de document : texte imprimé Auteurs : P. Unnikrishnan, Auteur ; D. Srinivas, Auteur Année de publication : 2012 Article en page(s) : pp. 6356-6363 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Catalyst Calcining Résumé : An eco-friendly building block and fuel additive—dimethyl carbonate (DMC)-was synthesized through a benign route by transesterification of propylene carbonate (PC) with methanol. The catalytic activity of a series of calcined, rare earth elements (La3+, Ce3+, Pr3+, Sm3+, and Y3+; 2-10 mol %) incorporated Mg―Al hydrotalcites (HT) was evaluated for this reaction. Among several, the La (8 mol %) modified HT showed the highest activity (PC conversion = 65.4 mol % and DMC selectivity = 88 mol % at 150 °C and in 2 h). Basicity of the catalyst played an important role on the transesterification activity. The influence of reaction parameters and calcination temperature on the catalytic activity of HT was investigated. The La modified HT catalyst was heterogeneous and could be reused with little loss of activity. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25867287 [article] Calcined, rare earth modified hydrotalcite as a solid, reusable catalyst for dimethyl carbonate synthesis [texte imprimé] / P. Unnikrishnan, Auteur ; D. Srinivas, Auteur . - 2012 . - pp. 6356-6363. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 18 (Mai 2012) . - pp. 6356-6363 Mots-clés : Catalyst Calcining Résumé : An eco-friendly building block and fuel additive—dimethyl carbonate (DMC)-was synthesized through a benign route by transesterification of propylene carbonate (PC) with methanol. The catalytic activity of a series of calcined, rare earth elements (La3+, Ce3+, Pr3+, Sm3+, and Y3+; 2-10 mol %) incorporated Mg―Al hydrotalcites (HT) was evaluated for this reaction. Among several, the La (8 mol %) modified HT showed the highest activity (PC conversion = 65.4 mol % and DMC selectivity = 88 mol % at 150 °C and in 2 h). Basicity of the catalyst played an important role on the transesterification activity. The influence of reaction parameters and calcination temperature on the catalytic activity of HT was investigated. The La modified HT catalyst was heterogeneous and could be reused with little loss of activity. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25867287

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