高聚合率的水溶性聚磷酸铵制备工艺研究  

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

作　　者：谌勇 杨三可 解田 陶绍程 龙庆兰 刘旭 Chen Yong;Yang Sanke;Xie Tian;Tao Shaocheng;Long Qinglan;Liu Xu(School of Chemistry and Chemical Engineering,Guizhou University,Guiyang 550025,China;Wengfu(Group)Co.,Ltd.;National Key Laboratory of Efficient Utilization of Low Grade Phosphate Rock and its Associated Resources)

机构地区：[1]贵州大学化学与化工学院,贵州贵阳550025 [2]瓮福(集团)有限责任公司 [3]中低品位磷矿及其共伴生资源高效利用国家重点实验室

出　　处：《无机盐工业》2020年第5期50-52,共3页Inorganic Chemicals Industry

基　　金：贵州省科技重大专项计划项目(黔科合重大专项字[2016]3001)。

摘　　要：以湿法磷酸和尿素为原料制备高聚合率的水溶性聚磷酸铵,考察了尿素与磷酸的物质的量比、聚合温度和聚合时间对聚磷酸铵聚合率的影响。通过实验得到最优工艺条件:尿素与磷酸的物质的量比为1.4、聚合温度为180℃、聚合时间为1.0 h,所得产品的聚合率为98.20%,五氧化二磷质量分数为63.33%,氮质量分数为13.85%。该产品水溶性良好,通过XRD分析确定聚磷酸铵的晶型为Ⅰ型聚磷酸铵。The water-soluble ammonium polyphosphate with high polymerization rate was prepared by using wet process phosphoric acid and urea as raw materials.The effects of amount-of-substance ratio of urea to phosphoric acid,polymerization temperature and polymerization time on the polymerization rate of ammonium polyphosphate were investigated.The optimum process conditions were as follows:the amount-of-substance ratio of urea to phosphoric acid was 1.4,the polymerization temperature 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.

关 键 词：湿法磷酸 聚磷酸铵 聚合率 尿素 

分 类 号：TQ113.79[化学工程—无机化工]