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Study on the recovery of phosphorus pentoxide from wet-process phosphoric acid extraction residue by alkaline process
Received date: 2020-08-12
Online published: 2021-07-13
Phosphoric acid is an important chemical raw material.At present,the method of producing phosphoric acid and phosphate mainly adopts wet-process,but wet-process phosphoric acid contains a large amount of impurities.In the process of purifying wet-process phosphoric acid by solvent extraction,a large amount of metal ion impurities precipitate in the form of insoluble phosphate precipitate,and the problem of recycling of insoluble P2O5 has received widespread attention.Alkaline hydrolysis process was used and single factor experiment was designed,the effect of liquid-solid ratio,n(Na2O)/n(P2O5),reac-tion temperature and reaction time on the wet-process phosphoric acid extraction residue(insoluble metal phosphate) deco-mposition were inspected,and a suitable range of reaction condition was selected.On this basis,the optimal reaction conditions were obtained through quadratic regression orthogonal experiments.The results showed that the optimum conditions were con-firmed as following:liquid-solid ratio was 30 mL/g, n(Na2O)/n(P2O5)was 3.31,reaction temperature was 82 ℃ and reactiontime was 4.05 h.Under optimum conditions,the recovery rate of P2O5 could reach 92.48%.The reaction lye could be further used as raw material for the production of trisodium phosphate.In this study,a reasonable scheme for purifying phosphoric acid extraction residue was obtained,and related parameters were given,which provided guidance for the practical applica-tion of this program.It was of great significance for the utilization of extraction residue and environmental protection.
Yaotao Zhang , Jun Li , Ming Chen , Zhuochao Zheng . Study on the recovery of phosphorus pentoxide from wet-process phosphoric acid extraction residue by alkaline process[J]. Inorganic Chemicals Industry, 2021 , 53(7) : 86 -91 . DOI: 10.19964/j.issn.1006-4990.2020-0459
[1] | 叶楷, 李沪萍, 罗康碧, 等. 湿法磷酸净化脱氟、硫、砷的研究进展[J]. 化工科技, 2017(4):59-64. |
[2] | 郑秀军. 膜分离技术在磷酸净化中的应用[J]. 磷肥与复肥, 2020, 35(3):22-24. |
[3] | 王智娟, 韦昌桃. 湿法磷酸净化技术研究进展[J]. 化工矿物与加工, 2019, 48(10):50-55. |
[4] | 黄飞舟, 武斌, 陈葵, 等. Ca4AlSiSO4F13·12H2O对湿法磷酸净化的影响研究[J]. 化工矿物与加工, 2019, 48(12):46-51. |
[5] | 周权宝, 李步通, 左林桂, 等. 湿法磷酸中金属离子净化技术研究进展[J]. 应用化工, 2017, 46(7):1417-1423. |
[6] | 冯胜波, 李白玉, 何勇岗. 湿法磷酸净化的研究现状[J]. 硫磷设计与粉体工程, 2012(2):41-44. |
[7] | 刘玉强. 饲料级磷酸氢钙生产中预中和渣的综合利用[J]. 化工环保, 1999(6):41-44. |
[8] | 王玉训, 朱奉刚. 含磷母液,滤渣的资源化利用[J]. 磷肥与复肥, 2013, 28(1):30-32. |
[9] | 胡国涛, 王凤霞, 晋华. 利用湿法磷酸淤渣制取特种高镁普钙的研究[J]. 云南化工, 2018(7):41-43. |
[10] | 李英翔, 吴长莹, 张必江, 等. 用湿法磷酸加工副产磷渣生产硝基磷酸铵镁[J]. 磷肥与复肥, 2016, 31(4):20-21,31. |
[11] | 郝庆. 中国磷矿资源开发利用现状及建议[J]. 科学, 2014, 66(5):51-55. |
[12] | 王丽, 李军, 金央, 等. 一种皮革废料处理的新工艺[J]. 无机盐工业, 2019, 51(4):67-71. |
[13] | GB/T 1871. 1—1995 磷矿石和磷精矿中五氧化二磷含量的测定磷钼酸喹啉重量法和容量法[S]. |
[14] | 徐樟松. 用三聚磷酸钠中和废渣制备磷酸三钠[J]. 化工环保, 1994, 14(4):246-248. |
[15] | 张弓. 磷酸三钠结晶过程研究[D]. 天津:天津大学, 2016. |
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