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Catalytic effect of magnesium ions on silicic acid polycondensation and inhibition strategies based on chelation / Konstantinos D. Demadis in Industrial & engineering chemistry research, Vol. 51 N° 26 (Juillet 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 26 (Juillet 2012) . - pp. 9032-9040 Titre : Catalytic effect of magnesium ions on silicic acid polycondensation and inhibition strategies based on chelation Type de document : texte imprimé Auteurs : Konstantinos D. Demadis, Auteur ; Antonia Ketsetzi, Auteur ; Eva-Maria Sarigiannidou, Auteur Année de publication : 2012 Article en page(s) : pp. 9032-9040 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Condensation  polymerization  Catalytic  reaction Résumé : The catalytic role of Mg2+ ions in the polycondensation of silicic acid to form amorphous silica has been investigated in detail. This behavior is pH-dependent. As pH increases (herein, the three pH values 8.0, 9.0, and 9.5 were tested), the catalytic effect of Mg2+ ions becomes more pronounced. Also, this behavior is directly proportional to the concentration of Mg2+. Ethylenediaminetetraacetic acid (EDTA) can inhibit this catalytic effect by strongly chelating the Mg2+ ions. This research can be further expanded to other chelating agents that have an affinity for Mg2+ ions. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26107461 [article] Catalytic effect of magnesium ions on silicic acid polycondensation and inhibition strategies based on chelation [texte imprimé] / Konstantinos D. Demadis, Auteur ; Antonia Ketsetzi, Auteur ; Eva-Maria Sarigiannidou, Auteur . - 2012 . - pp. 9032-9040. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 26 (Juillet 2012) . - pp. 9032-9040 Mots-clés : Condensation  polymerization  Catalytic  reaction Résumé : The catalytic role of Mg2+ ions in the polycondensation of silicic acid to form amorphous silica has been investigated in detail. This behavior is pH-dependent. As pH increases (herein, the three pH values 8.0, 9.0, and 9.5 were tested), the catalytic effect of Mg2+ ions becomes more pronounced. Also, this behavior is directly proportional to the concentration of Mg2+. Ethylenediaminetetraacetic acid (EDTA) can inhibit this catalytic effect by strongly chelating the Mg2+ ions. This research can be further expanded to other chelating agents that have an affinity for Mg2+ ions. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26107461