IMAP副产磷淤渣制备硫基磷铵杂质的控制及表征  

Impurity control and product characterization in preparation of ammonium phosphate sulfate from phosphorus sludge in production of industrial monoammonium phosphate

作　　者：邓伏礼[1] 杨韩 丁瑶 龙秉文[1] DENG Fu-li;YANG Han;DING Yao;LONG Bing-wen(Key Laboratory of Green Chemical Engineering Process of Ministry of Education,Wuhan Institute of Technology,Wuhan 430205,China;Wuhan University of Technology,Wuhan 430070,China)

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430205 [2]武汉理工大学,湖北武汉430070

出　　处：《现代化工》2023年第7期132-135,共4页Modern Chemical Industry

基　　金：湖北省重点研发计划项目(2020BCB063)。

摘　　要：工业级磷酸一铵(IMAP)生产时会产生大量的废磷淤渣,磷淤渣采用硫酸酸解后经脱氟、氨中和、冷却结晶、除杂可用来生产硫基磷铵。考察了结晶后的溶液在除杂过程中pH对制备硫基磷铵的影响。结果表明,当溶液pH为2.8时,滤液中MgO、Fe_(2)O_(3)和Al_(2)O_(3)质量分数分别为0.44%、0.06%和0.41%。硫基磷铵产品经ICP分析,Fe、Al和Mg元素质量分数分别为0.046%、0.074%和0.94%。XRD和红外以及热重分析表明,硫基磷铵是NH_(4)H_(2)PO_(4)和(NH_(4))_(2)SO_(4)组成的复合物。The production of industrial monoammonium phosphate(IMAP)will simultaneously generate a large amount of waste phosphorus sludge.Phosphorus sludge can be used to produce ammonium phosphate sulfate through sulfuric acid leaching,defluorination,ammonia neutralization,cooling crystallization,and impurity removal.The effect of pH value of crystallized solution for impurity removal on the preparation of ammonium phosphate sulfate is evaluated.Results show that the contents of MgO,Fe_(2)O_(3)and Al_(2)O_(3)in the filtrate are 0.44%,0.06%and 0.41%,respectively when the pH of the solution is adjusted to 2.8.It is found by ICP analysis that the mass fractions of Fe,Al and Mg in ammonium phosphate sulfate product are 0.046%,0.074%and 0.94%,respectively.It is verified through XRD,IR and thermogravimetric analysis that ammonium phosphate sulfate product may be a compound composed of NH_(4)H_(2)PO_(4)and(NH_(4))_(2)SO_(4).

关 键 词：工业级磷酸一铵 磷淤渣 硫基磷铵 除杂 

分 类 号：TQ11[化学工程—无机化工]