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Kinetics study on the liquid entrapment and melt transport of static and falling - film melt crystallization / Xiaobin Jiang in Industrial & engineering chemistry research, Vol. 51 N° 13 (Avril 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 13 (Avril 2012) . - pp. 5037-5044 Titre : Kinetics study on the liquid entrapment and melt transport of static and falling - film melt crystallization Type de document : texte imprimé Auteurs : Xiaobin Jiang, Auteur ; Baohong Hou, Auteur ; Yingying Zhao, Auteur Année de publication : 2012 Article en page(s) : pp. 5037-5044 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Melt  crystallization  Falling  film  Transport  process  Kinetics Résumé : Experiments were carried out to study the kinetics of crystal growth and the sweating process in two kinds of melt crystallization modes: static melt crystallization (SMC) and falling-film melt crystallization (FFMC). The system utilized in this paper was hyperpure phosphoric acid with water and trace amounts of metal ions as impurities. The kinetic experimental data of crystal growth, liquid entrapment, and the melt-transport process were well fitted by power function equations (R2 > 0.947). The fractal and porous media theories were introduced to improve the model of melt transport and explain the difference between the two modes. The separation efficiencies of SMC and FFMC on different ion impurities were compared. The SMC mode separated calcium and ferrum ions with higher efficiency than the FFMC mode, while the FFMC mode separated sodium and magnesium ions better than the SMC mode. A combined operation mode was suggested to prepare hyperpure phosphoric acid in industrial applications. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25777943 [article] Kinetics study on the liquid entrapment and melt transport of static and falling - film melt crystallization [texte imprimé] / Xiaobin Jiang, Auteur ; Baohong Hou, Auteur ; Yingying Zhao, Auteur . - 2012 . - pp. 5037-5044. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 13 (Avril 2012) . - pp. 5037-5044 Mots-clés : Melt  crystallization  Falling  film  Transport  process  Kinetics Résumé : Experiments were carried out to study the kinetics of crystal growth and the sweating process in two kinds of melt crystallization modes: static melt crystallization (SMC) and falling-film melt crystallization (FFMC). The system utilized in this paper was hyperpure phosphoric acid with water and trace amounts of metal ions as impurities. The kinetic experimental data of crystal growth, liquid entrapment, and the melt-transport process were well fitted by power function equations (R2 > 0.947). The fractal and porous media theories were introduced to improve the model of melt transport and explain the difference between the two modes. The separation efficiencies of SMC and FFMC on different ion impurities were compared. The SMC mode separated calcium and ferrum ions with higher efficiency than the FFMC mode, while the FFMC mode separated sodium and magnesium ions better than the SMC mode. A combined operation mode was suggested to prepare hyperpure phosphoric acid in industrial applications. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25777943

Model to simulate the structure of a crystal pillar and optimize the separation efficiency in melt crystallization by fractal theory and technique / Xiaobin Jiang in Industrial & engineering chemistry research, Vol. 50 N° 17 (Septembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 17 (Septembre 2011) . - pp. 10229-10245 Titre : Model to simulate the structure of a crystal pillar and optimize the separation efficiency in melt crystallization by fractal theory and technique Type de document : texte imprimé Auteurs : Xiaobin Jiang, Auteur ; Baohong Hou, Auteur ; Jingkang Wang, Auteur Année de publication : 2011 Article en page(s) : pp. 10229-10245 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Fractal  Melt  crystallization  Modeling Résumé : In this paper, an existing fractal porous media model was applied to simulate the structure of the crystal pillar formed in melt crystallization for electronic grade phosphoric acid (EGPA) preparation. The model was modified to meet the crystallization process; the structure parameter of the crystal pillar could be obtained by inspecting the seeping process and measuring the solid-liquid phase equilibrium condition. A characterized factor ϕ with realistic significance was introduced to modify the model, too. The simulation results met the experiment data well. An optimized operation curve was developed to obtain ultrapure EGPA product with higher separation efficiency. An optimized operation was proposed in this paper. Simulating the optimized operation with the model established above, we still obtained a satisfactory result. So the optimized experiment verified the stability and reliability of this model. This model can evaluate the separation effect which is vital to industrial crystal product manufacturing by anticipating the effective porosity of a crystal pillar. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24483667 [article] Model to simulate the structure of a crystal pillar and optimize the separation efficiency in melt crystallization by fractal theory and technique [texte imprimé] / Xiaobin Jiang, Auteur ; Baohong Hou, Auteur ; Jingkang Wang, Auteur . - 2011 . - pp. 10229-10245. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 17 (Septembre 2011) . - pp. 10229-10245 Mots-clés : Fractal  Melt  crystallization  Modeling Résumé : In this paper, an existing fractal porous media model was applied to simulate the structure of the crystal pillar formed in melt crystallization for electronic grade phosphoric acid (EGPA) preparation. The model was modified to meet the crystallization process; the structure parameter of the crystal pillar could be obtained by inspecting the seeping process and measuring the solid-liquid phase equilibrium condition. A characterized factor ϕ with realistic significance was introduced to modify the model, too. The simulation results met the experiment data well. An optimized operation curve was developed to obtain ultrapure EGPA product with higher separation efficiency. An optimized operation was proposed in this paper. Simulating the optimized operation with the model established above, we still obtained a satisfactory result. So the optimized experiment verified the stability and reliability of this model. This model can evaluate the separation effect which is vital to industrial crystal product manufacturing by anticipating the effective porosity of a crystal pillar. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24483667