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Comparison of solid−liquid equilibrium data for the adsorption of propionic acid and tartaric acid from aqueous solution onto amberlite IRA-67 / Hasan Uslu in Industrial & engineering chemistry research, Vol. 48 N° 16 (Août 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 16 (Août 2009) . - pp. 7767–7772 Titre : Comparison of solid−liquid equilibrium data for the adsorption of propionic acid and tartaric acid from aqueous solution onto amberlite IRA-67 Type de document : texte imprimé Auteurs : Hasan Uslu, Auteur ; Ismail Inci, Auteur ; Sahika Sena Bayazit, Auteur Année de publication : 2009 Article en page(s) : pp. 7767–7772 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Adsorption  parameters  Amberlite  IRA-67  adsorbent  Propionic  acid  Tartaric  acid Résumé : Investigation of adsorption parameters such as effect of initial acid concentration, effect of amount of adsorbent, effect of temperatures, effect of contact time, fitting data to isotherms, and kinetic models for propionic acid and tartaric acid by using Amberlite IRA-67 adsorbent was studied. The maximum adsorption efficiencies were found to be 97.18% and 84.46% for tartaric acid and propionic acid, respectively. The best fitted isotherm was determined to be Langmuir for tartaric acid. The Langmuir isotherm was better fitted than the Frundlich isotherm for both acids. Elovich model equation was applied for data of each acids. The kinetics of the adsorption for both acids was determined as pseudo-second-order model. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9005639 [article] Comparison of solid−liquid equilibrium data for the adsorption of propionic acid and tartaric acid from aqueous solution onto amberlite IRA-67 [texte imprimé] / Hasan Uslu, Auteur ; Ismail Inci, Auteur ; Sahika Sena Bayazit, Auteur . - 2009 . - pp. 7767–7772. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 16 (Août 2009) . - pp. 7767–7772 Mots-clés : Adsorption  parameters  Amberlite  IRA-67  adsorbent  Propionic  acid  Tartaric  acid Résumé : Investigation of adsorption parameters such as effect of initial acid concentration, effect of amount of adsorbent, effect of temperatures, effect of contact time, fitting data to isotherms, and kinetic models for propionic acid and tartaric acid by using Amberlite IRA-67 adsorbent was studied. The maximum adsorption efficiencies were found to be 97.18% and 84.46% for tartaric acid and propionic acid, respectively. The best fitted isotherm was determined to be Langmuir for tartaric acid. The Langmuir isotherm was better fitted than the Frundlich isotherm for both acids. Elovich model equation was applied for data of each acids. The kinetics of the adsorption for both acids was determined as pseudo-second-order model. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9005639

Extraction equilibria of propionic acid from aqueous solutions by Amberlite LA-2 in diluent solvents / Yavuz Selim Asci in Chemical engineering journal, Vol. 155 N° 3 (Decembre 2009) 

Public ISBD [article]  in Chemical engineering journal > Vol. 155 N° 3 (Decembre 2009) . - pp. 784-788 Titre : Extraction equilibria of propionic acid from aqueous solutions by Amberlite LA-2 in diluent solvents Type de document : texte imprimé Auteurs : Yavuz Selim Asci, Auteur ; Ismail Inci, Auteur Année de publication : 2010 Article en page(s) : pp. 784-788 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Extraction  Propionic  acid  Amberlite  LA-2 Index. décimale : 660 Résumé : Amberlite LA-2 (a secondary amine) was studied for its ability to extract propionic acid at different amine concentrations. The extraction of propionic acid by Amberlite LA-2 dissolved in seven single solvents (cyclohexane, 2-octanone, toluene, methyl isobutyl ketone, isooctane, haxane and 1-octanol) was investigated under various amine concentrations at 298.15 K. Using Bizek's approach, two acids: amine complexes, (HO):(R2N) and (HO):(R2N)2, are assumed to exist in the organic phase in case of proton-donating diluents, while the complexes (HO):(R2N) and (HO)2:(R2N)3 are suggested in the case of non-proton-donating diluents. Important data for design of separation units have been obtained as a result of batch experiments. These data are distribution coefficients (D), loading factors (Z), extraction efficiency (E) and overall extraction constants (K11, K12, K23). The maximum removal of glycolic acid is 94.68% with MIBK and 0.93 mol L−1 initial concentration of Amberlite LA-2. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4X97D48-1&_user=6 [...] [article] Extraction equilibria of propionic acid from aqueous solutions by Amberlite LA-2 in diluent solvents [texte imprimé] / Yavuz Selim Asci, Auteur ; Ismail Inci, Auteur . - 2010 . - pp. 784-788. Génie Chimique Langues : Anglais (eng) in Chemical engineering journal > Vol. 155 N° 3 (Decembre 2009) . - pp. 784-788 Mots-clés : Extraction  Propionic  acid  Amberlite  LA-2 Index. décimale : 660 Résumé : Amberlite LA-2 (a secondary amine) was studied for its ability to extract propionic acid at different amine concentrations. The extraction of propionic acid by Amberlite LA-2 dissolved in seven single solvents (cyclohexane, 2-octanone, toluene, methyl isobutyl ketone, isooctane, haxane and 1-octanol) was investigated under various amine concentrations at 298.15 K. Using Bizek's approach, two acids: amine complexes, (HO):(R2N) and (HO):(R2N)2, are assumed to exist in the organic phase in case of proton-donating diluents, while the complexes (HO):(R2N) and (HO)2:(R2N)3 are suggested in the case of non-proton-donating diluents. Important data for design of separation units have been obtained as a result of batch experiments. These data are distribution coefficients (D), loading factors (Z), extraction efficiency (E) and overall extraction constants (K11, K12, K23). The maximum removal of glycolic acid is 94.68% with MIBK and 0.93 mol L−1 initial concentration of Amberlite LA-2. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4X97D48-1&_user=6 [...]