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Biobutanol recovery using nonfluorinated task - specific ionic liquids / Lesly Y. Garcia-Chavez in Industrial & engineering chemistry research, Vol. 51 N° 24 (Juin 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 24 (Juin 2012) . - pp. 8293–8301 Titre : Biobutanol recovery using nonfluorinated task - specific ionic liquids Type de document : texte imprimé Auteurs : Lesly Y. Garcia-Chavez, Auteur ; Christian M. Garsia, Auteur ; Boelo Schuur, Auteur Année de publication : 2012 Article en page(s) : pp. 8293–8301 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Biobutanol  Nonfluorinated  Ionic  liquids Résumé : Biobutanol has received major attention as an alternative for and additive to fossil fuels. Biobutanol produced via fermentation is hampered by low butanol concentrations in the fermentation broth. An efficient separation process is required to make biobutanol production economically viable. In this work, liquid–liquid extraction of butanol from water, employing nonfluorinated task-specific ionic liquids (TSILs) has been evaluated against distillation and extraction with conventional solvents. Experimental data for the equilibrium distribution ratios of butanol and water were used in a conceptual process design study to find the most promising solvent. The results show that the IL with the best distribution coefficient and very high selectivity was [TOAMNaph] (DBuOH = 21, S = 274), performing much better than the benchmark solvent oleyl alcohol (DBuOH = 3.42, S = 192). The conceptual design study showed that butanol extraction with [TOAMNaph] requires 73% less energy than in conventional distillation (5.65 MJ/kg BuOH vs 21.3 MJ/kg for distillation). ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201855h [article] Biobutanol recovery using nonfluorinated task - specific ionic liquids [texte imprimé] / Lesly Y. Garcia-Chavez, Auteur ; Christian M. Garsia, Auteur ; Boelo Schuur, Auteur . - 2012 . - pp. 8293–8301. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 24 (Juin 2012) . - pp. 8293–8301 Mots-clés : Biobutanol  Nonfluorinated  Ionic  liquids Résumé : Biobutanol has received major attention as an alternative for and additive to fossil fuels. Biobutanol produced via fermentation is hampered by low butanol concentrations in the fermentation broth. An efficient separation process is required to make biobutanol production economically viable. In this work, liquid–liquid extraction of butanol from water, employing nonfluorinated task-specific ionic liquids (TSILs) has been evaluated against distillation and extraction with conventional solvents. Experimental data for the equilibrium distribution ratios of butanol and water were used in a conceptual process design study to find the most promising solvent. The results show that the IL with the best distribution coefficient and very high selectivity was [TOAMNaph] (DBuOH = 21, S = 274), performing much better than the benchmark solvent oleyl alcohol (DBuOH = 3.42, S = 192). The conceptual design study showed that butanol extraction with [TOAMNaph] requires 73% less energy than in conventional distillation (5.65 MJ/kg BuOH vs 21.3 MJ/kg for distillation). ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201855h

Equilibrium studies on enantioselective liquid-liquid Amino Acid extraction using a cinchona alkaloid extractant / Boelo Schuur ; Jozef G.M. Winkelman ; Hero J. Heeres in Industrial & engineering chemistry research, Vol. 47 n°24 (Décembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°24 (Décembre 2008) . - p. 10027–10033 Titre : Equilibrium studies on enantioselective liquid-liquid Amino Acid extraction using a cinchona alkaloid extractant Type de document : texte imprimé Auteurs : Boelo Schuur, Auteur ; Jozef G.M. Winkelman, Auteur ; Hero J. Heeres, Auteur Année de publication : 2009 Article en page(s) : p. 10027–10033 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Liquid-Liquid  Amino  Acid Résumé : The enantioselective extraction of aqueous 3,5-dinitrobenzoyl-R,S-leucine (AR,S) by a cinchona alkaloid extractant (C) in 1,2-dichloroethane was studied at room temperature (294 K) in a batch system for a range of intake concentrations (10−4−10−3 mol/L) and pH values (3.8−6.6). The experimental data were described by a reactive extraction model with a homogeneous organic phase reaction of AR,S with C. Important parameters of this model were determined experimentally. The acid dissociation constant, Ka, of AR,S was (1.92 ± 0.07) × 10−4 mol/L. The physical distribution coefficient of AR,S between the organic and aqueous phase was 8.04 ± 0.39. The equilibrium constants of the organic phase complexation reaction were (9.31 ± 0.76) × 104 L/mol and (2.71 ± 0.76) × 104 L/mol for the S- and R-enantiomers, respectively. With these parameters an optimum performance factor, PF, of 0.19 was predicted. The PF was independent of the pH provided that pH ≫ pKa. The model was verified experimentally with excellent results (±7.9%). En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800668e [article] Equilibrium studies on enantioselective liquid-liquid Amino Acid extraction using a cinchona alkaloid extractant [texte imprimé] / Boelo Schuur, Auteur ; Jozef G.M. Winkelman, Auteur ; Hero J. Heeres, Auteur . - 2009 . - p. 10027–10033. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°24 (Décembre 2008) . - p. 10027–10033 Mots-clés : Liquid-Liquid  Amino  Acid Résumé : The enantioselective extraction of aqueous 3,5-dinitrobenzoyl-R,S-leucine (AR,S) by a cinchona alkaloid extractant (C) in 1,2-dichloroethane was studied at room temperature (294 K) in a batch system for a range of intake concentrations (10−4−10−3 mol/L) and pH values (3.8−6.6). The experimental data were described by a reactive extraction model with a homogeneous organic phase reaction of AR,S with C. Important parameters of this model were determined experimentally. The acid dissociation constant, Ka, of AR,S was (1.92 ± 0.07) × 10−4 mol/L. The physical distribution coefficient of AR,S between the organic and aqueous phase was 8.04 ± 0.39. The equilibrium constants of the organic phase complexation reaction were (9.31 ± 0.76) × 104 L/mol and (2.71 ± 0.76) × 104 L/mol for the S- and R-enantiomers, respectively. With these parameters an optimum performance factor, PF, of 0.19 was predicted. The PF was independent of the pH provided that pH ≫ pKa. The model was verified experimentally with excellent results (±7.9%). En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800668e

Ionic liquid screening for ethylbenzene/styrene separation by extractive distillation / Mark T.G. Jongmans in Industrial & engineering chemistry research, Vol. 50 N° 18 (Septembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 18 (Septembre 2011) . - pp. 10800–10810 Titre : Ionic liquid screening for ethylbenzene/styrene separation by extractive distillation Type de document : texte imprimé Auteurs : Mark T.G. Jongmans, Auteur ; Boelo Schuur, Auteur ; Andre B. de Haan, Auteur Année de publication : 2011 Article en page(s) : pp. 10800–10810 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Ionic  liquid Résumé : The separation of ethylbenzene from styrene by distillation is very energy-intensive, because of the low relative volatility (1.3–1.4). Extractive distillation is a promising alternative to separate the close boiling mixture, in which the solvent selection is crucial for the process feasibility. In this work, an ionic liquid screening study by liquid–liquid equilibrium (LLE) experiments has been performed to investigate whether ionic liquids (ILs) show potential to separate ethylbenzene from styrene by extractive distillation. The screening method by LLE experiments was validated by VLE experiments for several ILs. The performance of the ILs was compared with the benchmark solvent sulfolane, which displays a selectivity of 1.6. Several ILs outperform sulfolane with selectivities up to 2.6. From the results of the LLE experiments, it was concluded that there is a clear tradeoff between capacity and selectivity. ILs with a high capacity usually have a low selectivity, whereas ILs with high selectivity exhibit low capacity. Both cation and anion structure strongly influence the performance. The highest selectivities (2.4–2.6) were obtained with ILs containing aromatic cations, and anions with localized electrons. The largest capacities (0.45–0.6 for styrene) were obtained for ionic liquids with delocalized electrons in the anion and large alkyl chain length in both cation and anion. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2011627 [article] Ionic liquid screening for ethylbenzene/styrene separation by extractive distillation [texte imprimé] / Mark T.G. Jongmans, Auteur ; Boelo Schuur, Auteur ; Andre B. de Haan, Auteur . - 2011 . - pp. 10800–10810. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 18 (Septembre 2011) . - pp. 10800–10810 Mots-clés : Ionic  liquid Résumé : The separation of ethylbenzene from styrene by distillation is very energy-intensive, because of the low relative volatility (1.3–1.4). Extractive distillation is a promising alternative to separate the close boiling mixture, in which the solvent selection is crucial for the process feasibility. In this work, an ionic liquid screening study by liquid–liquid equilibrium (LLE) experiments has been performed to investigate whether ionic liquids (ILs) show potential to separate ethylbenzene from styrene by extractive distillation. The screening method by LLE experiments was validated by VLE experiments for several ILs. The performance of the ILs was compared with the benchmark solvent sulfolane, which displays a selectivity of 1.6. Several ILs outperform sulfolane with selectivities up to 2.6. From the results of the LLE experiments, it was concluded that there is a clear tradeoff between capacity and selectivity. ILs with a high capacity usually have a low selectivity, whereas ILs with high selectivity exhibit low capacity. Both cation and anion structure strongly influence the performance. The highest selectivities (2.4–2.6) were obtained with ILs containing aromatic cations, and anions with localized electrons. The largest capacities (0.45–0.6 for styrene) were obtained for ionic liquids with delocalized electrons in the anion and large alkyl chain length in both cation and anion. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2011627