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Research on preparation process of water-soluble ammonium polyphosphate with high polymerization rate
Received date: 2019-11-28
Online published: 2020-05-21
The water-soluble ammonium polyphosphate with high polymerization rate was prepared by using wet process phos-phoric acid and urea as raw materials.The effects of amount-of-substance ratio of urea to phosphoric acid,polymerization tem-perature and polymerization time on the polymerization rate of ammonium polyphosphate were investigated.The optimum pro-cess conditions were as follows：the amount-of-substance ratio of urea to phosphoric acid was 1.4,the polymerization temper-ature was 180 ℃ and the polymerization time was 1.0 h.Under the optimal conditions,the polymerization rate of the obtained product was 98.20%,the mass fraction of phosphorus pentoxide was 63.33% and the mass fraction of nitrogen was 13.85%. the water solubility was good,and the crystal form of ammonium polyphosphate was analyzed by XRD as type Ⅰ ammonium polyphosphate.
Yong Chen , Sanke Yang , Tian Xie , Shaocheng Tao , Qinglan Long , Xu Liu . Research on preparation process of water-soluble ammonium polyphosphate with high polymerization rate[J]. Inorganic Chemicals Industry, 2020 , 52(5) : 50 -52 . DOI: 10.11962/1006-4990.2019-0344
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