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A novel process to prepare ammonium polyphosphate with crystalline form II and its comparison with melamine polyphosphate / Gousheng Liu 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. 12148–12155 Titre : A novel process to prepare ammonium polyphosphate with crystalline form II and its comparison with melamine polyphosphate Type de document : texte imprimé Auteurs : Gousheng Liu, Auteur ; Wenyan Chen, Auteur ; Jianguo Yu, Auteur Année de publication : 2011 Article en page(s) : pp. 12148–12155 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Ammonium  polyphosphate  Crystalline Résumé : P4O10 is highly deliquescent and reactive; techniques using non-P4O10 process are not only required for environmental protection, but also for consideration of safety and cost in industrial-scale production. A non-P4O10 process to prepare ammonium polyphosphate with crystalline form II (APP-II) was proposed by heating the mixture of diammonium hydrogen phosphate (DAP) and melamine under wet ammonia. Its water solubility, FT-IR, XRD, and 31P NMR spectra were compared with those of commercial APP-II and melamine polyphosphate (MPoly), and interesting results were obtained. Thermogravometric analysis (TGA) showed the synthesized APP-II had better thermal stability than commercial APP-II. The reaction mechanism and molecular structure for the subject compound were investigated and discussed in detail. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1014102 [article] A novel process to prepare ammonium polyphosphate with crystalline form II and its comparison with melamine polyphosphate [texte imprimé] / Gousheng Liu, Auteur ; Wenyan Chen, Auteur ; Jianguo Yu, Auteur . - 2011 . - pp. 12148–12155. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 23 (Décembre 2010) . - pp. 12148–12155 Mots-clés : Ammonium  polyphosphate  Crystalline Résumé : P4O10 is highly deliquescent and reactive; techniques using non-P4O10 process are not only required for environmental protection, but also for consideration of safety and cost in industrial-scale production. A non-P4O10 process to prepare ammonium polyphosphate with crystalline form II (APP-II) was proposed by heating the mixture of diammonium hydrogen phosphate (DAP) and melamine under wet ammonia. Its water solubility, FT-IR, XRD, and 31P NMR spectra were compared with those of commercial APP-II and melamine polyphosphate (MPoly), and interesting results were obtained. Thermogravometric analysis (TGA) showed the synthesized APP-II had better thermal stability than commercial APP-II. The reaction mechanism and molecular structure for the subject compound were investigated and discussed in detail. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1014102