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Development of a continuous emulsion copolymerization process in a tubular reactor / Antonio C. S. M. Carvalho in Industrial & engineering chemistry research, Vol. 49 N° 21 (Novembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 21 (Novembre 2010) . - pp. 10262-10273 Titre : Development of a continuous emulsion copolymerization process in a tubular reactor Type de document : texte imprimé Auteurs : Antonio C. S. M. Carvalho, Auteur ; Dennis L. Chicoma, Auteur ; Reinaldo Giudici, Auteur Année de publication : 2011 Article en page(s) : pp. 10262-10273 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Tubular  reactor  Emulsion  copolymerization Résumé : This contribution describes the development of a continuous emulsion copolymerization processs for vinyl acetate and n-butyl acrylate in a tubular reactor. Special features of this reactor include the use of oscillatory (pulsed) flow and internals (sieve plates) to prevent polymer fouling and promote good radial mixing, along with a controlled amount of axial mixing. The copolymer system studied (vinyl acetate and butyl acrylate) is strongly prone to composition drift due to very different reactivity ratios. An axially dispersed plug flow model, based on classical free radical copolymerization kinetics, was developed for this process and used successfully to optimize the lateral feeding profile to reduce compositional drift. An energy balance was included in the model equations to predict the effect of temperature variations on the process. The model predictions were validated with experimental data for monomer conversion, copolymer composition, average particle size, and temperature measured along the reactor length. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23447916 [article] Development of a continuous emulsion copolymerization process in a tubular reactor [texte imprimé] / Antonio C. S. M. Carvalho, Auteur ; Dennis L. Chicoma, Auteur ; Reinaldo Giudici, Auteur . - 2011 . - pp. 10262-10273. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 21 (Novembre 2010) . - pp. 10262-10273 Mots-clés : Tubular  reactor  Emulsion  copolymerization Résumé : This contribution describes the development of a continuous emulsion copolymerization processs for vinyl acetate and n-butyl acrylate in a tubular reactor. Special features of this reactor include the use of oscillatory (pulsed) flow and internals (sieve plates) to prevent polymer fouling and promote good radial mixing, along with a controlled amount of axial mixing. The copolymer system studied (vinyl acetate and butyl acrylate) is strongly prone to composition drift due to very different reactivity ratios. An axially dispersed plug flow model, based on classical free radical copolymerization kinetics, was developed for this process and used successfully to optimize the lateral feeding profile to reduce compositional drift. An energy balance was included in the model equations to predict the effect of temperature variations on the process. The model predictions were validated with experimental data for monomer conversion, copolymer composition, average particle size, and temperature measured along the reactor length. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23447916