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http://yadda.icm.edu.pl:80/baztech/element/bwmeta1.element.baztech-article-BPS2-0041-0014

Czasopismo

Polish Journal of Chemical Technology

Tytuł artykułu

Influence of methanol and ethanol on vitamin C crystallization temperature - neural network model

Autorzy Piotrowski, K.  Wierzbowska, B.  Koralewska, J.  Matynia, A. 
Treść / Zawartość http://content.sciendo.com/view/journals/pjct/pjct-overview.xml
Warianty tytułu
Języki publikacji EN
Abstrakty
EN Addition of aliphatic alcohol improves the yield of the technical vitamin C (L(+)-ascorbic acid) purification process via batch crystallization. Simultaneous presence of two alcohols (methanol and ethanol) in the system, in respect of complex physicochemical interactions, modifies the metastable zone width more effectively than it could be achieved by adding these alcohols individually. This essentially influences batch crystallization process time, as well as the supersaturation discharge dynamics (limiting of excessive primary nucleation and agglomeration). Existence of complex, nonlinear relations in L(+)-ascorbic acid-MeOH-EtOH-H2O system inclined the authors towards the elaboration of its neural network's model.
Słowa kluczowe
PL witamina C   krystalizacja okresowa   sieć neuronowa   temperatura krystalizacji  
EN vitamin C   batch crystallization   neural networks   crystallization temperature  
Wydawca West Pomeranian University of Technology. Publishing House
Czasopismo Polish Journal of Chemical Technology
Rocznik 2006
Tom Vol. 8, nr 4
Strony 23--26
Opis fizyczny Bibliogr. 8 poz., rys., tab.
Twórcy
autor Piotrowski, K.
autor Wierzbowska, B.
autor Koralewska, J.
autor Matynia, A.
Bibliografia
(1) Reichstein T., Grussner A.: A good synthesis of L-ascorbic acid (vitamin C), Helv. Chim. Acta, 1934, 17, 311.
(2) Boudrant J.: Microbial processes for ascorbic acid biosynthesis: a review, Enzyme Microb. Technol., 1990, 12, 322.
(3) Šnajdman L. O.: Proizvodstvo vitaminov, Piščevaja promyšlennost, Moskva, 1973.
(4) Matynia A., Wierzbowska B., Bechtold Z., Kozak E.: Nucleation of vitamin C, in: Proceedings of the 14th Symposium on Industrial Crystallization, CD-ROM, No. 0090, Inst. Chem. Eng., UK, 1999.
(5) Freitas A. M. B., Giulietti M.: Crystallization of L-ascorbic acid from aqueous solutions, in: Proceedings of the 15th Symposium on Industrial Crystallization, Vol. 1, No. 232, Edited by Angelo Chianese, Sorrento, Italy, 2002.
(6) Matynia A., Wierzbowska B., Bechtold Z.: Crystal growth of L(+)-ascorbic acid in batch crystallizer, Pol. J. Chem. Technol., 2000, 2, 1, 14.
(7) Wierzbowska B., Matynia A., Bechtold Z., Małasińska M.: Crystallization capacity in the L(+)-ascorbic acid-methanol-ethanol-water system, Inż. Chem. Proc, 2004, 25, 1771.
(8) Tambe S. S., Kulkarni B. D., Deshpande P. B.: Elements of Artificial Neural Networks with selected applications in Chemical Engineering and Chemical & Biological Sciences, Simulation & Advanced Controls, Inc., Louisville, KY, USA, 1992
Kolekcja BazTech
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