Kinetics study for ion - exchange - resin catalyzed hydrolysis of methyl glycolate / Yan Xu in Industrial & engineering chemistry research, Vol. 51 N° 36 (Septembre 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 36 (Septembre 2012) . - pp. 11653-11658 Titre : Kinetics study for ion - exchange - resin catalyzed hydrolysis of methyl glycolate Type de document : texte imprimé Auteurs : Yan Xu, Auteur ; Wenjing Dou, Auteur ; Yujun Zhao, Auteur Année de publication : 2012 Article en page(s) : pp. 11653-11658 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Hydrolysis Catalytic reaction Ion exchange resin Kinetics Résumé : The hydrolysis of methyl glycolate catalyzed by commercial cation-exchange resin was studied in a stirred tank batch reactor. It was found that 001×7 resin was an effective catalyst for the hydrolysis of methyl glycolate. The effects of catalyst loading, initial reactant ratio and temperature have been examined in detail. The kinetics of glycolate hydrolysis was evaluated by the use of the pseudohomogeneous model, which was found to represent the kinetics fairly well, due to the total dissociation of the active sulfonic acid group in swollen polymer resin in the presence of water. The kinetics was expressed in terms of activities and the activity coefficients were estimated by using the group contribution method UNIFAC. The activation energy was found to be 59.26 kJ/mol for 001x7 resin, indicating surface reaction is the rate-controlling step. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26350331 [article] Kinetics study for ion - exchange - resin catalyzed hydrolysis of methyl glycolate [texte imprimé] / Yan Xu, Auteur ; Wenjing Dou, Auteur ; Yujun Zhao, Auteur . - 2012 . - pp. 11653-11658. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 36 (Septembre 2012) . - pp. 11653-11658 Mots-clés : Hydrolysis Catalytic reaction Ion exchange resin Kinetics Résumé : The hydrolysis of methyl glycolate catalyzed by commercial cation-exchange resin was studied in a stirred tank batch reactor. It was found that 001×7 resin was an effective catalyst for the hydrolysis of methyl glycolate. The effects of catalyst loading, initial reactant ratio and temperature have been examined in detail. The kinetics of glycolate hydrolysis was evaluated by the use of the pseudohomogeneous model, which was found to represent the kinetics fairly well, due to the total dissociation of the active sulfonic acid group in swollen polymer resin in the presence of water. The kinetics was expressed in terms of activities and the activity coefficients were estimated by using the group contribution method UNIFAC. The activation energy was found to be 59.26 kJ/mol for 001x7 resin, indicating surface reaction is the rate-controlling step. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26350331

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