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Crystallization of spherical common salt in the submillimeter size range without habit modifier / Indrajit Mukhopadhyay in Industrial & engineering chemistry research, Vol. 49 N° 23 (Décembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 23 (Décembre 2010) . - pp. 12197–12203 Titre : Crystallization of spherical common salt in the submillimeter size range without habit modifier Type de document : texte imprimé Auteurs : Indrajit Mukhopadhyay, Auteur ; Vadake. P. Mohandas, Auteur ; Girish R. Desale, Auteur Année de publication : 2011 Article en page(s) : pp. 12197–12203 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Crystallization  Spherical Résumé : Nearly spherical morphology of solution-grown NaCl particles in the size range of 300−1000 μm was achieved at 55−60 °C employing a suitable crystallizer equipped with a butterfly wing-shaped impeller operated at 250 rpm. Morphology control was equally effective with synthetic and natural brines and required no habit modifier. Sieved spherical salt of 350−500 μm size exhibited superior flow (ca. 20% greater mass flow rate through a funnel; angle of repose 16°)—as compared to commercial vacuum evaporated free flow cubic salt of comparable dimension—upon treatment with potassium ferrocyanide anticaking additive. The superior flow characteristic was retained even after 3 months of storage. Scanning electron microscopic studies revealed that the round polycrystalline particles were derived from the stacking of minute NaCl cubes and the average size of the spheres was amenable to reduction through use of ethanol as antisolvent. The process was successfully scaled up to 10 kg level. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1016317 [article] Crystallization of spherical common salt in the submillimeter size range without habit modifier [texte imprimé] / Indrajit Mukhopadhyay, Auteur ; Vadake. P. Mohandas, Auteur ; Girish R. Desale, Auteur . - 2011 . - pp. 12197–12203. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 23 (Décembre 2010) . - pp. 12197–12203 Mots-clés : Crystallization  Spherical Résumé : Nearly spherical morphology of solution-grown NaCl particles in the size range of 300−1000 μm was achieved at 55−60 °C employing a suitable crystallizer equipped with a butterfly wing-shaped impeller operated at 250 rpm. Morphology control was equally effective with synthetic and natural brines and required no habit modifier. Sieved spherical salt of 350−500 μm size exhibited superior flow (ca. 20% greater mass flow rate through a funnel; angle of repose 16°)—as compared to commercial vacuum evaporated free flow cubic salt of comparable dimension—upon treatment with potassium ferrocyanide anticaking additive. The superior flow characteristic was retained even after 3 months of storage. Scanning electron microscopic studies revealed that the round polycrystalline particles were derived from the stacking of minute NaCl cubes and the average size of the spheres was amenable to reduction through use of ethanol as antisolvent. The process was successfully scaled up to 10 kg level. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1016317