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Effects of cooling rate, saturation temperature, and solvent on the metastable zone width of triethanolamine hydrochloride / Yan Zhang in Industrial & engineering chemistry research, Vol. 50 N° 10 (Mai 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 10 (Mai 2011) . - pp. 6375-6381 Titre : Effects of cooling rate, saturation temperature, and solvent on the metastable zone width of triethanolamine hydrochloride Type de document : texte imprimé Auteurs : Yan Zhang, Auteur ; Zhibao Li, Auteur Année de publication : 2011 Article en page(s) : pp. 6375-6381 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Saturation  Cooling Résumé : The metastable zone widths (MZWs) of triethanolamine hydrochloride ([HTEA]Cl), defined as the maximum temperature difference ΔTmax a solution can withstand before crystallization of a solid phase, in water, ethanol-water, and HCl-water mixed solvents have been determined at a saturation temperature To range from 293.15 to 303.15 K with cooling rate R from 3 to 8 K·h-1. Solubilities of [HTEA]Cl in ethanol-water mixtures have also been obtained using a dynamic method. An equation of MZW with similar form to Sangwal's equation was derived from the fundamental driving force of crystallization based on chemical potential. With the newly obtained equation, the experimental values of MZW ΔTmax for [HTEA]Cl-water system at 298.15 K was correlated with the cooling rate R by ln(ΔTmax/T0) = -6.140 + 1.222 In R. The enthalpy of mixing ΔHmix was calculated with the solubility data, and the result of differential scanning calorimetry (DSC). For [HTEA]Cl-water system, the value of ΔHmix was determined to be 30.88 kJ·mol-1, and the addition of both HCl and ethanol led to a decrease of -ΔHmix. The experimental results also showed that MZW could be greatly enhanced when ethanol and HCl were added. It was found that the values ofMZW decrease with -ΔHmix for both [HTEA]Cl-ethanol-water and [HTEA]Cl-HCl-water systems at the same saturation temperature and cooling rate. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24158934 [article] Effects of cooling rate, saturation temperature, and solvent on the metastable zone width of triethanolamine hydrochloride [texte imprimé] / Yan Zhang, Auteur ; Zhibao Li, Auteur . - 2011 . - pp. 6375-6381. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 10 (Mai 2011) . - pp. 6375-6381 Mots-clés : Saturation  Cooling Résumé : The metastable zone widths (MZWs) of triethanolamine hydrochloride ([HTEA]Cl), defined as the maximum temperature difference ΔTmax a solution can withstand before crystallization of a solid phase, in water, ethanol-water, and HCl-water mixed solvents have been determined at a saturation temperature To range from 293.15 to 303.15 K with cooling rate R from 3 to 8 K·h-1. Solubilities of [HTEA]Cl in ethanol-water mixtures have also been obtained using a dynamic method. An equation of MZW with similar form to Sangwal's equation was derived from the fundamental driving force of crystallization based on chemical potential. With the newly obtained equation, the experimental values of MZW ΔTmax for [HTEA]Cl-water system at 298.15 K was correlated with the cooling rate R by ln(ΔTmax/T0) = -6.140 + 1.222 In R. The enthalpy of mixing ΔHmix was calculated with the solubility data, and the result of differential scanning calorimetry (DSC). For [HTEA]Cl-water system, the value of ΔHmix was determined to be 30.88 kJ·mol-1, and the addition of both HCl and ethanol led to a decrease of -ΔHmix. The experimental results also showed that MZW could be greatly enhanced when ethanol and HCl were added. It was found that the values ofMZW decrease with -ΔHmix for both [HTEA]Cl-ethanol-water and [HTEA]Cl-HCl-water systems at the same saturation temperature and cooling rate. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24158934

A feasible post-treatment of drying and rewetting for preparation of high-flux pluronic F127/polyethersulfone nanofiltration membranes / Yan Zhang in Industrial & engineering chemistry research, Vol. 50 N° 8 (Avril 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp.4678–4685 Titre : A feasible post-treatment of drying and rewetting for preparation of high-flux pluronic F127/polyethersulfone nanofiltration membranes Type de document : texte imprimé Auteurs : Yan Zhang, Auteur ; Su, Yanlei, Auteur ; Wenjuan Chen, Auteur Année de publication : 2011 Article en page(s) : pp.4678–4685 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Pluronic  Nanofiltration  membranes Résumé : Pluronic F127/polyethersulfone (PES) blend nanofiltration membranes were fabricated by varying polymer weight ratios of WF127/WPES in casting solutions from 0.0 to 100.0 wt %. The initial wet membranes prepared via the phase inversion method were post-treated by drying at room temperature and then immersion into water for rewetting to obtain Pluronic F127/PES nanofiltration membranes. Membrane shrinkage and swelling, cross section and surface morphologies, water uptake, surface hydrophilicity, X-ray diffraction pattern, water flux, and rejection of dyes for Pluronic F127/PES nanofiltration membranes were investigated. The introduction of Pluronic F127 into PES membranes can substantially alleviate the membrane shrinkage during drying treatment. All of the prepared Pluronic F127/PES nanofiltration membranes can completely reject Alcian blue with a molecular weight of 1299. The water permeance of Pluronic F127/PES nanofiltration membrane at WF127/WPES of 80% is as high as 176.2 L/(m2 h MPa). After long-term immersion into sodium hypochlorite solution, Pluronic F127/PES nanofiltration membranes still keep over 95.7% rejection of Alcian blue. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie102463k [article] A feasible post-treatment of drying and rewetting for preparation of high-flux pluronic F127/polyethersulfone nanofiltration membranes [texte imprimé] / Yan Zhang, Auteur ; Su, Yanlei, Auteur ; Wenjuan Chen, Auteur . - 2011 . - pp.4678–4685. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp.4678–4685 Mots-clés : Pluronic  Nanofiltration  membranes Résumé : Pluronic F127/polyethersulfone (PES) blend nanofiltration membranes were fabricated by varying polymer weight ratios of WF127/WPES in casting solutions from 0.0 to 100.0 wt %. The initial wet membranes prepared via the phase inversion method were post-treated by drying at room temperature and then immersion into water for rewetting to obtain Pluronic F127/PES nanofiltration membranes. Membrane shrinkage and swelling, cross section and surface morphologies, water uptake, surface hydrophilicity, X-ray diffraction pattern, water flux, and rejection of dyes for Pluronic F127/PES nanofiltration membranes were investigated. The introduction of Pluronic F127 into PES membranes can substantially alleviate the membrane shrinkage during drying treatment. All of the prepared Pluronic F127/PES nanofiltration membranes can completely reject Alcian blue with a molecular weight of 1299. The water permeance of Pluronic F127/PES nanofiltration membrane at WF127/WPES of 80% is as high as 176.2 L/(m2 h MPa). After long-term immersion into sodium hypochlorite solution, Pluronic F127/PES nanofiltration membranes still keep over 95.7% rejection of Alcian blue. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie102463k

Group contribution method for predicting melting points of imidazolium and benzimidazolium ionic liquids / Yan Huo 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) . - p. 4176 Titre : Group contribution method for predicting melting points of imidazolium and benzimidazolium ionic liquids Type de document : texte imprimé Auteurs : Yan Huo, Auteur ; Shuqian Xia, Auteur ; Yan Zhang, Auteur Année de publication : 2009 Article en page(s) : p. 4176 Note générale : Chemical engineering Langues : Anglais (eng) Note de contenu : Additions and corrections of the same article in volume 48 n° 4 in pages: 2212-2217 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900347d [article] Group contribution method for predicting melting points of imidazolium and benzimidazolium ionic liquids [texte imprimé] / Yan Huo, Auteur ; Shuqian Xia, Auteur ; Yan Zhang, Auteur . - 2009 . - p. 4176. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 8 (Avril 2009) . - p. 4176 Note de contenu : Additions and corrections of the same article in volume 48 n° 4 in pages: 2212-2217 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900347d

Group contribution method for predicting melting points of imidazolium and benzimidazolium ionic liquids / Yan Huo 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) . - p. 4176 Titre : Group contribution method for predicting melting points of imidazolium and benzimidazolium ionic liquids Type de document : texte imprimé Auteurs : Yan Huo, Auteur ; Shuqian Xia, Auteur ; Yan Zhang, Auteur Année de publication : 2009 Article en page(s) : p. 4176 Note générale : Chemical engineering Langues : Anglais (eng) Note de contenu : Additions and corrections of the same article in volume 48 n° 4 in pages: 2212-2217 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900347d [article] Group contribution method for predicting melting points of imidazolium and benzimidazolium ionic liquids [texte imprimé] / Yan Huo, Auteur ; Shuqian Xia, Auteur ; Yan Zhang, Auteur . - 2009 . - p. 4176. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 8 (Avril 2009) . - p. 4176 Note de contenu : Additions and corrections of the same article in volume 48 n° 4 in pages: 2212-2217 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900347d

Group contribution method for predicting melting points of imidazolium and benzimidazolium ionic liquids / Yan Huo in Industrial & engineering chemistry research, Vol. 48 N°4 (Février 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - p. 2212–2217 Titre : Group contribution method for predicting melting points of imidazolium and benzimidazolium ionic liquids Type de document : texte imprimé Auteurs : Yan Huo, Auteur ; Shuqian Xia, Auteur ; Yan Zhang, Auteur Année de publication : 2009 Article en page(s) : p. 2212–2217 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Imidazolium--Melting  points  Benzimidazolium  ionic  liquids--Melting  points Résumé : A new model is proposed here to estimate melting points of imidazolium and benzimidazolium ionic liquids (ILs) from chemical structures by using a group contribution method, which considers the contributions of normal groups, ionic groups, and characteristic factors of molecules. The melting points of ILs are fitted by the equation presented in this study. Thirty simple groups and three characteristic factors were defined in the model based on the optimization of property values of 155 ionic liquids. The average relative deviation in this work is less than 5.86%, and calculated values of an additional 35 ILs are compared with the values in the literature. The R2 for 190 ILs is about 0.8984. The results show that melting points of ILs determined by the method are accurate and thus the new model can be applied to predict melting points of ILs. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8011215 [article] Group contribution method for predicting melting points of imidazolium and benzimidazolium ionic liquids [texte imprimé] / Yan Huo, Auteur ; Shuqian Xia, Auteur ; Yan Zhang, Auteur . - 2009 . - p. 2212–2217. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - p. 2212–2217 Mots-clés : Imidazolium--Melting  points  Benzimidazolium  ionic  liquids--Melting  points Résumé : A new model is proposed here to estimate melting points of imidazolium and benzimidazolium ionic liquids (ILs) from chemical structures by using a group contribution method, which considers the contributions of normal groups, ionic groups, and characteristic factors of molecules. The melting points of ILs are fitted by the equation presented in this study. Thirty simple groups and three characteristic factors were defined in the model based on the optimization of property values of 155 ionic liquids. The average relative deviation in this work is less than 5.86%, and calculated values of an additional 35 ILs are compared with the values in the literature. The R2 for 190 ILs is about 0.8984. The results show that melting points of ILs determined by the method are accurate and thus the new model can be applied to predict melting points of ILs. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8011215

Multiobjective optimization of a porous ceramic membrane reactor for oxidative coupling of methane / Mohammad R. Quddus in Industrial & engineering chemistry research, Vol. 49 N° 14 (Juillet 2010) 

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Synthesis of three novel intumescent flame retardants having azomethine linkages and their applications in EVA copolym / Yan Liu in Industrial & engineering chemistry research, Vol. 51 N° 34 (Août 2012) 

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