磷钾伴生矿制备三聚磷酸铝  

Preparation of aluminum tripolyphosphate from phosphate-potassium ore

作　　者：王为国[1] 李青鹏[2] 吕仁亮[2] 马家玉[2] 汪铁林[1] 王存文[1] 

机构地区：[1]武汉工程大学绿色化工过程教育部重点实验室,湖北武汉430073 [2]武汉工程大学化工与制药学院,湖北武汉430073

出　　处：《南京工业大学学报（自然科学版）》2015年第4期104-108,共5页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家自然科学基金(51274153);湖北省自然科学基金重点项目(2011CDA120);湖北省中低品位磷矿资源开发利用协同创新中心开放基金(P201105)

摘　　要：以湖北宜昌地区磷钾伴生矿酸浸液为原料,经净化及碱液处理等工序制备Al(OH)3干胶,然后与H3PO4经中和、缩合和水化合成三聚磷酸铝,最后对合成条件进行优化。合成三聚磷酸铝优化工艺条件:Al(OH)3与60%的H3PO4按P2O5与Al2O3的摩尔比(磷铝比)3∶1,中和温度70℃,中和时间60 min,缩合温度290℃,缩合时间4 h。对优化条件下得到的产品进行化学成分分析,同时采用傅里叶变换红外光谱仪(FT-IR)和X线衍射仪(XRD)对产品进行结构表征。结果表明:所得产品是三聚磷酸铝,产品主组分含量符合Q/HGY 07—1999的要求。Using acid leaching liquid of phosphate-potassium ore from Yichang,Hubei Province,as raw material,dry aluminum gel was obtained through processes of purification and alkali extraction. Then the dry aluminum gel and phosphoric acid were used to synthesize aluminum tripolyphosphate by neutralization, condensation and hydration reaction. The optimum conditions for aluminum tripolyphosphate preparation were n（ H3PO4）∶ n（Al（OH）3） = 3∶ 1,temperature neutralization reaction of70 ℃,neutralization reaction time of 60 min,condensation temperature of 290 ℃,and condensation time of 4 h. The product obtained under the optimum conditions was analyzed and its structure and morphology were characterized by X-ray diffraction（ XRD） and Fourier transform infrared spectroscopy（ FT-IR）.Results showed that the obtained product was aluminum tripolyphosphate and met the requirements of Q /HGY 07—1999.

关 键 词：磷钾伴生矿 综合利用 三聚磷酸铝 

分 类 号：TQ126.35[化学工程—无机化工]