A Novel Process to Prepare Ammonium Polyphosphate with Crystalline Form II and its Comparison with Melamine Polyphosphate

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...

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Bibliographic Details
Published inIndustrial & engineering chemistry research Vol. 49; no. 23; pp. 12148 - 12155
Main Authors Liu, Gousheng, Chen, Wenyan, Yu, Jianguo
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 01.12.2010
Subjects
Applied Chemistry
Applied sciences
Chemical engineering
Exact sciences and technology
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Summary: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.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie1014102