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Selective extraction and identification of neutral nitrogen compounds contained in straight-run diesel feed Using chloride based ionic liquid / Li-Li Xie ; Alain Favre-Reguillon ; Stephane Pellet-Rostaing ; Xu-Xu Wang in Industrial & engineering chemistry research, Vol. 47 n°22 (Novembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°22 (Novembre 2008) . - p. 8801–8807 Titre : Selective extraction and identification of neutral nitrogen compounds contained in straight-run diesel feed Using chloride based ionic liquid Type de document : texte imprimé Auteurs : Li-Li Xie, Auteur ; Alain Favre-Reguillon, Auteur ; Stephane Pellet-Rostaing, Auteur ; Xu-Xu Wang, Auteur Année de publication : 2008 Article en page(s) : p. 8801–8807 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Chloride  Based  Ionic  Liquid  Diesel Résumé : Extraction of neutral nitrogen-containing compounds (N-compounds) has been investigated with chloride based ionic liquids (ILs) with varying cation classes (imidazolium, pyridinium). ILs were first discriminated by their mutual solubility of ILs and model fuel. Low solubility of 1-butyl-3-methylimidazolinium chloride (BMImCl) and 1-octylpyridinium chloride (OcPyCl) in the model fuel was observed. The ILs were then evaluated using a synthetic solution with dibenzothiophene and carbazole as model compounds, and a high selectivity for N-compounds was found. BMImCl and OcPyCl were then evaluated using straight-run diesel feed, containing 13 400 ppm S and 105 ppm N. An extraction of up to 50% of the N-compounds was obtained in one step whereas the sulfur concentration reduction was only 5%. Both ILs can be regenerated using small amount of water. Extracted compounds could be then extracted using toluene. The major constituents were identified by GC-MS. Analysis of the extracted compounds emphasized the selectivity of the extraction process. Furthermore, refractory sulfur-containing compounds (S-compounds) and polyaromatics were also identified in the extract. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie701704q [article] Selective extraction and identification of neutral nitrogen compounds contained in straight-run diesel feed Using chloride based ionic liquid [texte imprimé] / Li-Li Xie, Auteur ; Alain Favre-Reguillon, Auteur ; Stephane Pellet-Rostaing, Auteur ; Xu-Xu Wang, Auteur . - 2008 . - p. 8801–8807. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°22 (Novembre 2008) . - p. 8801–8807 Mots-clés : Chloride  Based  Ionic  Liquid  Diesel Résumé : Extraction of neutral nitrogen-containing compounds (N-compounds) has been investigated with chloride based ionic liquids (ILs) with varying cation classes (imidazolium, pyridinium). ILs were first discriminated by their mutual solubility of ILs and model fuel. Low solubility of 1-butyl-3-methylimidazolinium chloride (BMImCl) and 1-octylpyridinium chloride (OcPyCl) in the model fuel was observed. The ILs were then evaluated using a synthetic solution with dibenzothiophene and carbazole as model compounds, and a high selectivity for N-compounds was found. BMImCl and OcPyCl were then evaluated using straight-run diesel feed, containing 13 400 ppm S and 105 ppm N. An extraction of up to 50% of the N-compounds was obtained in one step whereas the sulfur concentration reduction was only 5%. Both ILs can be regenerated using small amount of water. Extracted compounds could be then extracted using toluene. The major constituents were identified by GC-MS. Analysis of the extracted compounds emphasized the selectivity of the extraction process. Furthermore, refractory sulfur-containing compounds (S-compounds) and polyaromatics were also identified in the extract. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie701704q

Selective extraction of neutral nitrogen-containing compounds from straight-run diesel feed using polymer-supported ionic liquid moieties / Li-Li Xie in Industrial & engineering chemistry research, Vol. 48 N° 8 (Avril 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 8 (Avril 2009) . - pp. 3973–3977 Titre : Selective extraction of neutral nitrogen-containing compounds from straight-run diesel feed using polymer-supported ionic liquid moieties Type de document : texte imprimé Auteurs : Li-Li Xie, Auteur ; Alain Favre-Reguillon, Auteur ; Xu-Xu Wang, Auteur Année de publication : 2009 Article en page(s) : pp. 3973–3977 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Polar  compounds  Hydrodesulfurization  process  Chloride-based  ionic  liquids  Diesel  feeds Résumé : The extraction of trace polar compounds, among them neutral nitrogen-containing compounds (N-compounds), has received much attention from refiners because of their inhibiting effect on the hydrodesulfurization (HDS) process. Recently, we have shown that chloride-based ionic liquids (ILs) can selectively extract N-compounds from straight-run diesel feeds. However, the measurable solubility of ILs in hydrocarbon fuel is not a desired outcome of the process. Thus, the covalent binding of ILs moieties on polymers was studied. Starting from Merrifield resin, three resins were prepared with imidazolium, pyridinium, and triethylammonium chloride functionality. The resins were evaluated using a synthetic solution with dibenzothiophene and carbazole as model compounds, and a high selectivity for N-compounds was found. Imidazolium and pyridinium resins were then further evaluated using straight-run diesel feed containing 13400 ppm S and 105 ppm N. The selectivity toward N-compounds was comparable to the selectivity observed with ILs. Moreover, the resins could be easily regenerated using a protic solvent like methanol. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900142p [article] Selective extraction of neutral nitrogen-containing compounds from straight-run diesel feed using polymer-supported ionic liquid moieties [texte imprimé] / Li-Li Xie, Auteur ; Alain Favre-Reguillon, Auteur ; Xu-Xu Wang, Auteur . - 2009 . - pp. 3973–3977. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 8 (Avril 2009) . - pp. 3973–3977 Mots-clés : Polar  compounds  Hydrodesulfurization  process  Chloride-based  ionic  liquids  Diesel  feeds Résumé : The extraction of trace polar compounds, among them neutral nitrogen-containing compounds (N-compounds), has received much attention from refiners because of their inhibiting effect on the hydrodesulfurization (HDS) process. Recently, we have shown that chloride-based ionic liquids (ILs) can selectively extract N-compounds from straight-run diesel feeds. However, the measurable solubility of ILs in hydrocarbon fuel is not a desired outcome of the process. Thus, the covalent binding of ILs moieties on polymers was studied. Starting from Merrifield resin, three resins were prepared with imidazolium, pyridinium, and triethylammonium chloride functionality. The resins were evaluated using a synthetic solution with dibenzothiophene and carbazole as model compounds, and a high selectivity for N-compounds was found. Imidazolium and pyridinium resins were then further evaluated using straight-run diesel feed containing 13400 ppm S and 105 ppm N. The selectivity toward N-compounds was comparable to the selectivity observed with ILs. Moreover, the resins could be easily regenerated using a protic solvent like methanol. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900142p