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Inert - gas - stripping method for measuring solubilities of sparingly soluble gases in liquids. solubilities of some gases in protic ionic liquid 1 - Butyl, 3 - hydrogen - imidazolium acetate / Waheed Afzal in Industrial & engineering chemistry research, Vol. 51 N° 11 (Mars 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 11 (Mars 2012) . - pp. 4433-4439 Titre : Inert - gas - stripping method for measuring solubilities of sparingly soluble gases in liquids. solubilities of some gases in protic ionic liquid 1 - Butyl, 3 - hydrogen - imidazolium acetate Type de document : texte imprimé Auteurs : Waheed Afzal, Auteur ; Brian Yoo, Auteur ; John M. Prausnitz, Auteur Année de publication : 2012 Article en page(s) : pp. 4433-4439 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Ionic  liquid  Solubility  Stripping  Inert  gas Résumé : The inert-gas stripping method is useful for rapidly measuring solubilities of moderately and sparingly soluble gases in liquids. Earlier versions of this method can give only solubilities of volatile-liquid solutes in low-volatile solvents. However, the modifications presented here enable measurement of very low solubilities of gases in liquids. Henry's constants are reported for carbon dioxide, krypton, oxygen, air, and nitrogen in n-dodecane and n-pentadecane, and for carbon dioxide in ethylene glycol at near-ambient conditions. The new Henry's constants compare well with those in the literature. Henry's constants are reported for carbon dioxide, ethane, ethylene, krypton, oxygen, air, and nitrogen at near-ambient conditions in the protic ionic liquid 1-butyl, 3-hydrogen-imidazolium acetate; we select this protic ionic liquid because, relative to other ionic liquids, it has low viscosity and because solubility data in protic ionic liquids are rare. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25655651 [article] Inert - gas - stripping method for measuring solubilities of sparingly soluble gases in liquids. solubilities of some gases in protic ionic liquid 1 - Butyl, 3 - hydrogen - imidazolium acetate [texte imprimé] / Waheed Afzal, Auteur ; Brian Yoo, Auteur ; John M. Prausnitz, Auteur . - 2012 . - pp. 4433-4439. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 11 (Mars 2012) . - pp. 4433-4439 Mots-clés : Ionic  liquid  Solubility  Stripping  Inert  gas Résumé : The inert-gas stripping method is useful for rapidly measuring solubilities of moderately and sparingly soluble gases in liquids. Earlier versions of this method can give only solubilities of volatile-liquid solutes in low-volatile solvents. However, the modifications presented here enable measurement of very low solubilities of gases in liquids. Henry's constants are reported for carbon dioxide, krypton, oxygen, air, and nitrogen in n-dodecane and n-pentadecane, and for carbon dioxide in ethylene glycol at near-ambient conditions. The new Henry's constants compare well with those in the literature. Henry's constants are reported for carbon dioxide, ethane, ethylene, krypton, oxygen, air, and nitrogen at near-ambient conditions in the protic ionic liquid 1-butyl, 3-hydrogen-imidazolium acetate; we select this protic ionic liquid because, relative to other ionic liquids, it has low viscosity and because solubility data in protic ionic liquids are rare. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25655651

Polarographic method for measuring oxygen diffusivity and solubility in water-saturated polymer films / Mahendra Chhabra in Industrial & engineering chemistry research, Vol. 47 N°10 (Mai 2008)

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°10 (Mai 2008) . - p. 3540–3550 Titre : Polarographic method for measuring oxygen diffusivity and solubility in water-saturated polymer films : application to hypertransmissible soft contact lenses Type de document : texte imprimé Auteurs : Mahendra Chhabra, Auteur ; John M. Prausnitz, Auteur ; C. J. Radke, Auteur Année de publication : 2008 Article en page(s) : p. 3540–3550 Note générale : Bibliogr. p.3549-3550 Langues : Anglais (eng) Mots-clés : Oxygen  --  Electrochemical-polarographic  method  ;  Polarographic  method Résumé : An electrochemical-polarographic method is described for measuring the diffusivity, D, and solubility, k, of oxygen in aqueous-saturated polymer films. While the apparatus and procedure are general for such films, it is here applied to determine D and k for oxygen in hypertransmissible soft contact lenses. Usually, only oxygen permeability, P, the product of D and k, is measured because P gauges the steady flux of oxygen through hydrogel membranes. However, we utilize the polarographic technique in the unsteady state and, hence, obtain D and k separately. Determination of each of these properties is critical for designing better lens materials that ensure sufficient oxygen supply to the cornea. We have measured oxygen diffusivities and solubilities for nine commercial soft contact lenses. Our data indicate that oxygen diffusivity is primarily responsible for the range of oxygen permeability observed for hypertransmissible soft contact lenses. For 2-hydroxyethyl methacrylate (HEMA)-based lenses, measured solubilities suggest that over 90% of the dissolved oxygen partitions to the polymer phase [article] Polarographic method for measuring oxygen diffusivity and solubility in water-saturated polymer films : application to hypertransmissible soft contact lenses [texte imprimé] / Mahendra Chhabra, Auteur ; John M. Prausnitz, Auteur ; C. J. Radke, Auteur . - 2008 . - p. 3540–3550. Bibliogr. p.3549-3550 Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°10 (Mai 2008) . - p. 3540–3550 Mots-clés : Oxygen  --  Electrochemical-polarographic  method  ;  Polarographic  method Résumé : An electrochemical-polarographic method is described for measuring the diffusivity, D, and solubility, k, of oxygen in aqueous-saturated polymer films. While the apparatus and procedure are general for such films, it is here applied to determine D and k for oxygen in hypertransmissible soft contact lenses. Usually, only oxygen permeability, P, the product of D and k, is measured because P gauges the steady flux of oxygen through hydrogel membranes. However, we utilize the polarographic technique in the unsteady state and, hence, obtain D and k separately. Determination of each of these properties is critical for designing better lens materials that ensure sufficient oxygen supply to the cornea. We have measured oxygen diffusivities and solubilities for nine commercial soft contact lenses. Our data indicate that oxygen diffusivity is primarily responsible for the range of oxygen permeability observed for hypertransmissible soft contact lenses. For 2-hydroxyethyl methacrylate (HEMA)-based lenses, measured solubilities suggest that over 90% of the dissolved oxygen partitions to the polymer phase

Solubility Parameters for Nine Ionic Liquids / Brian Yoo in Industrial & engineering chemistry research, Vol. 51 N° 29 (Juillet 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 29 (Juillet 2012) . - pp. 9913–9917 Titre : Solubility Parameters for Nine Ionic Liquids Type de document : texte imprimé Auteurs : Brian Yoo, Auteur ; Waheed Afzal, Auteur ; John M. Prausnitz, Auteur Année de publication : 2012 Article en page(s) : pp. 9913–9917 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Ionic  liquids Résumé : Solubility parameters are useful for estimating solubilities of solutes in ionic liquids when no solubility data are available. Solubility parameters are reported for nine ionic liquids; they were obtained from solubility data for a variety of solutes. The ionic liquids are 1-butyl,3-methylimidazolium hydrogen sulfate, 1-ethyl,3-methylimidazolium acetate, 1-methyl,3-trimethylsylilimidazolium chloride, 4-methyl,n-butylpyridinium tetrafluoroborate, ethylammonium nitrate, 1-ethyl,3-methylimidazolium bis(trifluoromethylsulfonyl)imide, 1-methyl,3-methylimidazolium bis(trifluoromethylsulfonyl)imide, 1-butyl,3-methylimidazolium bis(trifluoromethylsulfonyl)imide, and 1-ethyl,3-methylimidazolium ethylsulfate. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300588s [article] Solubility Parameters for Nine Ionic Liquids [texte imprimé] / Brian Yoo, Auteur ; Waheed Afzal, Auteur ; John M. Prausnitz, Auteur . - 2012 . - pp. 9913–9917. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 29 (Juillet 2012) . - pp. 9913–9917 Mots-clés : Ionic  liquids Résumé : Solubility parameters are useful for estimating solubilities of solutes in ionic liquids when no solubility data are available. Solubility parameters are reported for nine ionic liquids; they were obtained from solubility data for a variety of solutes. The ionic liquids are 1-butyl,3-methylimidazolium hydrogen sulfate, 1-ethyl,3-methylimidazolium acetate, 1-methyl,3-trimethylsylilimidazolium chloride, 4-methyl,n-butylpyridinium tetrafluoroborate, ethylammonium nitrate, 1-ethyl,3-methylimidazolium bis(trifluoromethylsulfonyl)imide, 1-methyl,3-methylimidazolium bis(trifluoromethylsulfonyl)imide, 1-butyl,3-methylimidazolium bis(trifluoromethylsulfonyl)imide, and 1-ethyl,3-methylimidazolium ethylsulfate. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300588s