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Batch distillation in a batch stripper with a side withdrawal for purification of heat - unstable compounds / Xianbao Cui in Industrial & engineering chemistry research, Vol. 49 N° 14 (Juillet 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 14 (Juillet 2010) . - pp. 6521–6529 Titre : Batch distillation in a batch stripper with a side withdrawal for purification of heat - unstable compounds Type de document : texte imprimé Auteurs : Xianbao Cui, Auteur ; Xiaokai Zhang, Auteur ; Ying Zhang, Auteur Année de publication : 2010 Article en page(s) : pp. 6521–6529 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Distillation  process Résumé : Batch distillation in a batch stripper with a side withdrawal (BSS) for the purification of heat-unstable compounds from light and heavy impurities was investigated. The batch distillation process was simulated by a dimensionless dynamic model and optimized by simulated annealing algorithm. Batch distillation in a BSS was compared with that in a batch stripper (BS) for the purification of heat-unstable compounds with different types of degradation reactions. The recovery of heat-unstable compounds in a BSS is larger than that in a BS, especially in the case of the heat-unstable compound converting to a heavy impurity. Compared with batch distillation in a batch rectifier with a side withdrawal (BRS), batch distillation in a BSS is more suitable for purification of heat-unstable compounds that convert to a light impurity. The effects of operational and design parameters for batch distillation in a BSS were discussed according to the simulation results, such as the temperature in the top storage vessel, the location of the side withdrawal stage, the holdup in the reboiler, the reboiler ratio, and the side reflux ratio. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901558c [article] Batch distillation in a batch stripper with a side withdrawal for purification of heat - unstable compounds [texte imprimé] / Xianbao Cui, Auteur ; Xiaokai Zhang, Auteur ; Ying Zhang, Auteur . - 2010 . - pp. 6521–6529. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 14 (Juillet 2010) . - pp. 6521–6529 Mots-clés : Distillation  process Résumé : Batch distillation in a batch stripper with a side withdrawal (BSS) for the purification of heat-unstable compounds from light and heavy impurities was investigated. The batch distillation process was simulated by a dimensionless dynamic model and optimized by simulated annealing algorithm. Batch distillation in a BSS was compared with that in a batch stripper (BS) for the purification of heat-unstable compounds with different types of degradation reactions. The recovery of heat-unstable compounds in a BSS is larger than that in a BS, especially in the case of the heat-unstable compound converting to a heavy impurity. Compared with batch distillation in a batch rectifier with a side withdrawal (BRS), batch distillation in a BSS is more suitable for purification of heat-unstable compounds that convert to a light impurity. The effects of operational and design parameters for batch distillation in a BSS were discussed according to the simulation results, such as the temperature in the top storage vessel, the location of the side withdrawal stage, the holdup in the reboiler, the reboiler ratio, and the side reflux ratio. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901558c

Batch distillation in a column with a side withdrawal for separation of a ternary mixture with a decomposing reaction / Xianbao Cui in Industrial & engineering chemistry research, Vol. 48 N° 10 (Mai 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 10 (Mai 2009) . - pp. 5111–5116 Titre : Batch distillation in a column with a side withdrawal for separation of a ternary mixture with a decomposing reaction Type de document : texte imprimé Auteurs : Xianbao Cui, Auteur ; Ying Zhang, Auteur ; Tianyang Feng, Auteur Année de publication : 2009 Article en page(s) : pp. 5111–5116 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Ternary  mixture  Decomposing  reaction  Batch  distillation  column  GEAR  integration  method Résumé : The separation of a ternary mixture with a decomposing reaction was investigated in a batch distillation column with a side withdrawal (BDS). The process was simulated by a constant molar holdup model solved by the GEAR integration method and optimized by a simulated annealing algorithm. Comparing to the batch rectifier and middle vessel batch distillation column, BDS is favorable for the purification of an intermediate component from light and heavy impurities with a decomposing reaction. The effects of top reflux ratio and side reflux ratio were also investigated. Different combinations of top and side reflux ratio result in different types of product withdrawal, and the optimal operation tends to be in a large top reflux ratio and a small side reflux ratio. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8017934 [article] Batch distillation in a column with a side withdrawal for separation of a ternary mixture with a decomposing reaction [texte imprimé] / Xianbao Cui, Auteur ; Ying Zhang, Auteur ; Tianyang Feng, Auteur . - 2009 . - pp. 5111–5116. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 10 (Mai 2009) . - pp. 5111–5116 Mots-clés : Ternary  mixture  Decomposing  reaction  Batch  distillation  column  GEAR  integration  method Résumé : The separation of a ternary mixture with a decomposing reaction was investigated in a batch distillation column with a side withdrawal (BDS). The process was simulated by a constant molar holdup model solved by the GEAR integration method and optimized by a simulated annealing algorithm. Comparing to the batch rectifier and middle vessel batch distillation column, BDS is favorable for the purification of an intermediate component from light and heavy impurities with a decomposing reaction. The effects of top reflux ratio and side reflux ratio were also investigated. Different combinations of top and side reflux ratio result in different types of product withdrawal, and the optimal operation tends to be in a large top reflux ratio and a small side reflux ratio. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8017934

Kinetics of transesterification of methyl acetate and n - butanol catalyzed by ionic liquid / Xianbao Cui in Industrial & engineering chemistry research, Vol. 50 N° 20 (Octobre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 20 (Octobre 2011) . - pp. 11521-11527 Titre : Kinetics of transesterification of methyl acetate and n - butanol catalyzed by ionic liquid Type de document : texte imprimé Auteurs : Xianbao Cui, Auteur ; Jialin Cai, Auteur ; Ying Zhang, Auteur Année de publication : 2011 Article en page(s) : pp. 11521-11527 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Ionic  liquid  Catalytic  reaction  Transesterification  Kinetics Résumé : The kinetic behavior and chemical equilibrium of the transesterification of methyl acetate with n-butanol catalyzed by an ionic liquid were investigated. The effects of reaction temperature, initial reactant molar ratio, and catalyst concentration on the reaction rate were studied. A reaction mechanism for transesterification catalyzed by ionic liquid is proposed based on Brønsted theory. Two different kinetic models, the ideal homogeneous (IH) model and the nonideal homogeneous (NIH) model, were used to correlate the kinetic data. The NIH model was able to describe the reaction rate reliably. The ionic liquid catalyst was compared with the conventional inorganic acid and ion-exchange resin catalysts sulfuric acid and Amberlyst 15, and it was found to be more active than the two conventional catalysts. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24612374 [article] Kinetics of transesterification of methyl acetate and n - butanol catalyzed by ionic liquid [texte imprimé] / Xianbao Cui, Auteur ; Jialin Cai, Auteur ; Ying Zhang, Auteur . - 2011 . - pp. 11521-11527. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 20 (Octobre 2011) . - pp. 11521-11527 Mots-clés : Ionic  liquid  Catalytic  reaction  Transesterification  Kinetics Résumé : The kinetic behavior and chemical equilibrium of the transesterification of methyl acetate with n-butanol catalyzed by an ionic liquid were investigated. The effects of reaction temperature, initial reactant molar ratio, and catalyst concentration on the reaction rate were studied. A reaction mechanism for transesterification catalyzed by ionic liquid is proposed based on Brønsted theory. Two different kinetic models, the ideal homogeneous (IH) model and the nonideal homogeneous (NIH) model, were used to correlate the kinetic data. The NIH model was able to describe the reaction rate reliably. The ionic liquid catalyst was compared with the conventional inorganic acid and ion-exchange resin catalysts sulfuric acid and Amberlyst 15, and it was found to be more active than the two conventional catalysts. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24612374