Investigation of the dissolution of colemanite ore in water and boric acid solutions including highly acidic ion exchangers under microwave heating / Cigdem Eymir Tekin in Industrial & engineering chemistry research, Vol. 50 N° 21 (Novembre 2011)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 50 N° 21 (Novembre 2011) . - pp. 11833-11842 Titre : Investigation of the dissolution of colemanite ore in water and boric acid solutions including highly acidic ion exchangers under microwave heating Type de document : texte imprimé Auteurs : Cigdem Eymir Tekin, Auteur ; Huseyin Okur, Auteur Année de publication : 2011 Article en page(s) : pp. 11833-11842 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Microwave heating Ion exchanger Dissolution Résumé : The dissolution of colemanite obtained from Bandirma Boraks Corporation was investigated in boric acid solutions containing highly acidic ion exchangers in a classical and microwave energy heating environment and the results showed that superior conversions can be obtained via microwave heating. Particle size, acid concentration, reaction temperature, stirring speed, amount of ion exchanger, solid to liquid ratio, and microwave power were selected as parameters. Dissolution kinetics of colemanite was also examined and it was observed that the dissolution rate increased with decreasing particle size and solid to liquid ratio and increased with stirring speed, acid concentration, and amount of acidic ion exchanger. The relationship between conversion and system parameters was determined with nonlinear estimation by using the statistical program Statistica 7.0. The activation energies (E) for classical and microwave heating methods were found as 24.40 and 22.98 kJmol-1, respectively. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24697499 [article] Investigation of the dissolution of colemanite ore in water and boric acid solutions including highly acidic ion exchangers under microwave heating [texte imprimé] / Cigdem Eymir Tekin, Auteur ; Huseyin Okur, Auteur . - 2011 . - pp. 11833-11842. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 21 (Novembre 2011) . - pp. 11833-11842 Mots-clés : Microwave heating Ion exchanger Dissolution Résumé : The dissolution of colemanite obtained from Bandirma Boraks Corporation was investigated in boric acid solutions containing highly acidic ion exchangers in a classical and microwave energy heating environment and the results showed that superior conversions can be obtained via microwave heating. Particle size, acid concentration, reaction temperature, stirring speed, amount of ion exchanger, solid to liquid ratio, and microwave power were selected as parameters. Dissolution kinetics of colemanite was also examined and it was observed that the dissolution rate increased with decreasing particle size and solid to liquid ratio and increased with stirring speed, acid concentration, and amount of acidic ion exchanger. The relationship between conversion and system parameters was determined with nonlinear estimation by using the statistical program Statistica 7.0. The activation energies (E) for classical and microwave heating methods were found as 24.40 and 22.98 kJmol-1, respectively. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24697499

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