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Ionic liquids for aromatics extraction. present status and future outlook / G. Wytze Meindersma in Industrial & engineering chemistry research, Vol. 49 N° 16 (Août 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 16 (Août 2010) . - pp. 7530–7540 Titre : Ionic liquids for aromatics extraction. present status and future outlook Type de document : texte imprimé Auteurs : G. Wytze Meindersma, Auteur ; Antje R. Hansmeier, Auteur ; Andre B. de Haan, Auteur Année de publication : 2010 Article en page(s) : pp. 7530–7540 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Ionic  Liquids Résumé : Ionic liquids (ILs) can be used to replace conventional solvents in liquid−liquid extractions of aromatic hydrocarbons. An IL-based extraction process requires fewer process steps and less energy consumption, provided that the mass-based aromatic distribution coefficient and/or the aromatic/aliphatic selectivity are higher than those of the current state-of-the-art solvents such as sulfolane. Only a small number of ionic liquids are able to combine higher mass-based distribution coefficients with selectivities comparable to or higher than those of sulfolane. The most suitable ILs from our analysis are [bmim]C(CN)3, [3-mebupy]N(CN)2, [3-mebupy]C(CN)3, and [3-mebupy]B(CN)4. The mass-based distribution coefficients with these four ILs for benzene, toluene, and p-xylene are factors of 1.2−2.5 higher than those with sulfolane, and the aromatic/aliphatic selectivities are up to a factor of 1.9 higher than with sulfolane. Based on the performed analysis, it can be concluded that industrial application of ILs for aromatics extraction has not yet materialized because only four of the total of 121 investigated ILs are considered suitable for aromatic/aliphatic separation. Most of the reported ILs do not provide higher mass-based aromatic distribution coefficients and/or higher aromatic/aliphatic selectivities than those achieved by conventional solvents such as sulfolane. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100703p [article] Ionic liquids for aromatics extraction. present status and future outlook [texte imprimé] / G. Wytze Meindersma, Auteur ; Antje R. Hansmeier, Auteur ; Andre B. de Haan, Auteur . - 2010 . - pp. 7530–7540. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 16 (Août 2010) . - pp. 7530–7540 Mots-clés : Ionic  Liquids Résumé : Ionic liquids (ILs) can be used to replace conventional solvents in liquid−liquid extractions of aromatic hydrocarbons. An IL-based extraction process requires fewer process steps and less energy consumption, provided that the mass-based aromatic distribution coefficient and/or the aromatic/aliphatic selectivity are higher than those of the current state-of-the-art solvents such as sulfolane. Only a small number of ionic liquids are able to combine higher mass-based distribution coefficients with selectivities comparable to or higher than those of sulfolane. The most suitable ILs from our analysis are [bmim]C(CN)3, [3-mebupy]N(CN)2, [3-mebupy]C(CN)3, and [3-mebupy]B(CN)4. The mass-based distribution coefficients with these four ILs for benzene, toluene, and p-xylene are factors of 1.2−2.5 higher than those with sulfolane, and the aromatic/aliphatic selectivities are up to a factor of 1.9 higher than with sulfolane. Based on the performed analysis, it can be concluded that industrial application of ILs for aromatics extraction has not yet materialized because only four of the total of 121 investigated ILs are considered suitable for aromatic/aliphatic separation. Most of the reported ILs do not provide higher mass-based aromatic distribution coefficients and/or higher aromatic/aliphatic selectivities than those achieved by conventional solvents such as sulfolane. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100703p

Potential of silver-based room-temperature ionic liquids for ethylene/ethane separation / Lara M. Galán Sánchez in Industrial & engineering chemistry research, Vol. 48 N° 23 (Décembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10650–10656 Titre : Potential of silver-based room-temperature ionic liquids for ethylene/ethane separation Type de document : texte imprimé Auteurs : Lara M. Galán Sánchez, Auteur ; G. Wytze Meindersma, Auteur ; André B. Haan, Auteur Année de publication : 2010 Article en page(s) : pp. 10650–10656 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Potential--Silver-Based--Room-Temperature--Ionic  Liquids--Ethylene/Ethane--Separation Résumé : The potential of room-temperature ionic liquids (RTILs) in separating ethylene from ethane is investigated. The absorption of olefins is enhanced by chemical absorption via π-complex formation with a transition-metal cation added to a standard RTIL. The effects of the ionic liquid structure of silver-based RTILs that contain Ag(I) salts (AgNO3, Ag[TfO], and Ag[Tf2N]) on gas absorption and solvent stability are investigated. The absorption isotherms of C2H4 and C2H6 into standard RTILs and designed silver-based RTILs were measured with a gravimetric balance between 303 and 333 K and up to 10 bar. C2H4 absorption was chemically enhanced in the silver-based RTILs and was considerably higher than that in the standard RTILs. Absorption of C2H6 in the silver-based RTILs is based on physical interactions only. The olefin/paraffin selectivity at a pressure of 1 bar was ∼30−50 higher in the silver-based RTILs than in standard ionic liquids. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9010244 [article] Potential of silver-based room-temperature ionic liquids for ethylene/ethane separation [texte imprimé] / Lara M. Galán Sánchez, Auteur ; G. Wytze Meindersma, Auteur ; André B. Haan, Auteur . - 2010 . - pp. 10650–10656. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10650–10656 Mots-clés : Potential--Silver-Based--Room-Temperature--Ionic  Liquids--Ethylene/Ethane--Separation Résumé : The potential of room-temperature ionic liquids (RTILs) in separating ethylene from ethane is investigated. The absorption of olefins is enhanced by chemical absorption via π-complex formation with a transition-metal cation added to a standard RTIL. The effects of the ionic liquid structure of silver-based RTILs that contain Ag(I) salts (AgNO3, Ag[TfO], and Ag[Tf2N]) on gas absorption and solvent stability are investigated. The absorption isotherms of C2H4 and C2H6 into standard RTILs and designed silver-based RTILs were measured with a gravimetric balance between 303 and 333 K and up to 10 bar. C2H4 absorption was chemically enhanced in the silver-based RTILs and was considerably higher than that in the standard RTILs. Absorption of C2H6 in the silver-based RTILs is based on physical interactions only. The olefin/paraffin selectivity at a pressure of 1 bar was ∼30−50 higher in the silver-based RTILs than in standard ionic liquids. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9010244