高聚合率的水溶性聚磷酸铵制备工艺研究

doi:10.11962/1006-4990.2019-0344

Abstract

Abstract:

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.

Key words: wet-process phosphoric acid, ammonium polyphosphate, polymerization rate, urea

CLC Number:

TQ113.79

Chen Yong,Yang Sanke,Xie Tian,Tao Shaocheng,Long Qinglan,Liu Xu. Research on preparation process of water-soluble ammonium polyphosphate with high polymerization rate[J]. Inorganic Chemicals Industry, 2020, 52(5): 50-52.

Figures/Tables 5

References 11

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实验次数	聚合率/%	w（N）/ %	w（P₂O₅）/%	水溶性	聚磷酸盐的组成/%
实验次数	聚合率/%	w（N）/ %	w（P₂O₅）/%	水溶性	w（正磷酸盐）	w（焦磷酸盐）	w（三聚磷酸盐）	w（四聚磷酸盐）
1	98.07	13.85	63.42	全部溶解	5.32	18.40	24.24	16.11
2	98.33	13.94	63.30	全部溶解	3.11	16.23	22.00	15.12
3	98.21	13.77	63.28	全部溶解	3.33	16.69	18.76	14.41
平均值	98.20	13.85	63.33		3.92	17.11	21.67	15.21

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Inorganic Acid-Base-Salt Committee of CIESC

Research on preparation process of water-soluble ammonium polyphosphate with high polymerization rate

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