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Application of the minka and myers theory of liquid adsorption to systems with two liquid phases / Christine Wegmann in Industrial & engineering chemistry research, Vol. 51 N° 21 (Mai 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 21 (Mai 2012) . - pp. 7340–7348 Titre : Application of the minka and myers theory of liquid adsorption to systems with two liquid phases Type de document : texte imprimé Auteurs : Christine Wegmann, Auteur ; Piet J. A. M. Kerkhof, Auteur Année de publication : 2012 Article en page(s) : pp. 7340–7348 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Adsorption  Liquid  phases Résumé : Dissolved acrylonitrile can be separated from a water stream by adsorption onto a polymeric sorbent (Dowex Optipore L-493) in a fixed bed and desorbed again by flushing the column with acetone. When the acetone fraction in the ternary mixture acrylonitrile/acetone/water is low and the acrylonitrile fraction is high, a phase separation between a water rich and an acrylonitrile rich phase occurs. In order to find the operating parameters for this separation process, the adsorbed amounts for all possible compositions of the bulk mixture need to be known. By use of a thermodynamic model, the loading in the ternary system was predicted from the three binary isotherms acrylonitrile/water, acrylonitrile/acetone, and acetone/water. These isotherms were determined experimentally. From the binary isotherms, the activity coefficients in the adsorbed phase were estimated. The binary model for the adsorbed phase activity coefficients was then extended to a ternary model. From this ternary activity coefficient model, the composition of the adsorbed phase was calculated as a function of the liquid phase composition. The agreement between the calculated adsorbed phase composition and the experimentally determined adsorbed phase composition is good to fair. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300273x [article] Application of the minka and myers theory of liquid adsorption to systems with two liquid phases [texte imprimé] / Christine Wegmann, Auteur ; Piet J. A. M. Kerkhof, Auteur . - 2012 . - pp. 7340–7348. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 21 (Mai 2012) . - pp. 7340–7348 Mots-clés : Adsorption  Liquid  phases Résumé : Dissolved acrylonitrile can be separated from a water stream by adsorption onto a polymeric sorbent (Dowex Optipore L-493) in a fixed bed and desorbed again by flushing the column with acetone. When the acetone fraction in the ternary mixture acrylonitrile/acetone/water is low and the acrylonitrile fraction is high, a phase separation between a water rich and an acrylonitrile rich phase occurs. In order to find the operating parameters for this separation process, the adsorbed amounts for all possible compositions of the bulk mixture need to be known. By use of a thermodynamic model, the loading in the ternary system was predicted from the three binary isotherms acrylonitrile/water, acrylonitrile/acetone, and acetone/water. These isotherms were determined experimentally. From the binary isotherms, the activity coefficients in the adsorbed phase were estimated. The binary model for the adsorbed phase activity coefficients was then extended to a ternary model. From this ternary activity coefficient model, the composition of the adsorbed phase was calculated as a function of the liquid phase composition. The agreement between the calculated adsorbed phase composition and the experimentally determined adsorbed phase composition is good to fair. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300273x

Solvent selection for the desorption of acrylonitrile from dowex optipore L - 493 / Christine Wegmann in Industrial & engineering chemistry research, Vol. 51 N° 1 (Janvier 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 1 (Janvier 2012) . - pp. 474-479 Titre : Solvent selection for the desorption of acrylonitrile from dowex optipore L - 493 Type de document : texte imprimé Auteurs : Christine Wegmann, Auteur ; Tanja Dekic Zivkovic, Auteur ; Piet J. A. M. Kerkhof, Auteur Année de publication : 2012 Article en page(s) : pp. 474-479 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Desorption Résumé : Dissolved acrylonitrile can be separated from water by adsorption onto a polymeric sorbent in a fixed bed. Switching the liquid phase from water in the adsorption step to another solvent in the desorption step can enhance the desorption of acrylonitrile from the sorbent. The selection of this solvent is the aim of this study. As a first step, computer aided molecular design was used to confine the experimental search domain. In this search the functional groups acetyl, alcohol, and amine appeared as parts of the potential solvents. As a second step, five organic solvents containing these functional groups were chosen. As a last step, the selected solvents were tested by performing adsorption experiments. Acetone was finally selected as desorption solvent for the adsorption-desorption process. This study demonstrates that by combining computer aided molecular design with experimental work, a wide range of solvents can be efficiently screened in a short time. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476491 [article] Solvent selection for the desorption of acrylonitrile from dowex optipore L - 493 [texte imprimé] / Christine Wegmann, Auteur ; Tanja Dekic Zivkovic, Auteur ; Piet J. A. M. Kerkhof, Auteur . - 2012 . - pp. 474-479. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 1 (Janvier 2012) . - pp. 474-479 Mots-clés : Desorption Résumé : Dissolved acrylonitrile can be separated from water by adsorption onto a polymeric sorbent in a fixed bed. Switching the liquid phase from water in the adsorption step to another solvent in the desorption step can enhance the desorption of acrylonitrile from the sorbent. The selection of this solvent is the aim of this study. As a first step, computer aided molecular design was used to confine the experimental search domain. In this search the functional groups acetyl, alcohol, and amine appeared as parts of the potential solvents. As a second step, five organic solvents containing these functional groups were chosen. As a last step, the selected solvents were tested by performing adsorption experiments. Acetone was finally selected as desorption solvent for the adsorption-desorption process. This study demonstrates that by combining computer aided molecular design with experimental work, a wide range of solvents can be efficiently screened in a short time. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476491