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Use of calorimetry model and batch control technique for scale-up of unseeded batch cooling crystallization of poly(hydroxybenzophenone) / Huiyong Kim in Industrial & engineering chemistry research, Vol. 48 N° 14 (Juillet 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 14 (Juillet 2009) . - pp. 6776–6782 Titre : Use of calorimetry model and batch control technique for scale-up of unseeded batch cooling crystallization of poly(hydroxybenzophenone) Type de document : texte imprimé Auteurs : Huiyong Kim, Auteur ; Yookyung Bang, Auteur ; Kwang Soon Lee, Auteur Année de publication : 2009 Article en page(s) : pp. 6776–6782 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Scale-up  method  Cooling  crystallization  Poly(hydroxybenzophenone)  Crystallization Résumé : A scale-up method to design and implement a cooling profile for unseeded batch cooling crystallization has been investigated. The reduced ratio between the heat-transfer area and the volume during scale-up to a large crystallizer causes an increase in the temperature distribution in the reactor, which can trigger unwanted nucleation around the cold spots of the vessel wall. To address this problem, a method is proposed to design a cooling profile for a scaled-up crystallizer that can replicate the seed-generation stage of a small crystallizer by effectively suppressing the unwanted nucleation. The use of a batch control technique as method of implementing the cooling profile in a large crystallizer is also proposed. Experiments were conducted with a 100 mL reactor and a 5 L scaled-up reactor for the unseeded crystallization of poly(hydroxybenzophenone) (PHBP) to verify the performance of the proposed method. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801039f [article] Use of calorimetry model and batch control technique for scale-up of unseeded batch cooling crystallization of poly(hydroxybenzophenone) [texte imprimé] / Huiyong Kim, Auteur ; Yookyung Bang, Auteur ; Kwang Soon Lee, Auteur . - 2009 . - pp. 6776–6782. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 14 (Juillet 2009) . - pp. 6776–6782 Mots-clés : Scale-up  method  Cooling  crystallization  Poly(hydroxybenzophenone)  Crystallization Résumé : A scale-up method to design and implement a cooling profile for unseeded batch cooling crystallization has been investigated. The reduced ratio between the heat-transfer area and the volume during scale-up to a large crystallizer causes an increase in the temperature distribution in the reactor, which can trigger unwanted nucleation around the cold spots of the vessel wall. To address this problem, a method is proposed to design a cooling profile for a scaled-up crystallizer that can replicate the seed-generation stage of a small crystallizer by effectively suppressing the unwanted nucleation. The use of a batch control technique as method of implementing the cooling profile in a large crystallizer is also proposed. Experiments were conducted with a 100 mL reactor and a 5 L scaled-up reactor for the unseeded crystallization of poly(hydroxybenzophenone) (PHBP) to verify the performance of the proposed method. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801039f