无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2021, Vol. 53 ›› Issue (5): 88-92.doi: 10.11962/1006-4990.2020-0350

• 环境·健康·安全 • 上一篇    下一篇

铝及铝合金化学抛光磷酸废液制备磷酸二氢铵研究

唐瑜钟(),郑帅飞,张庆喜,薛志强,覃吉善   

  1. 深圳市深投环保科技有限公司,广东深圳 518049
  • 收稿日期:2020-08-16 出版日期:2021-05-10 发布日期:2021-05-12
  • 作者简介:唐瑜钟(1985— ),女,硕士,工程师,主要从事危险废物无害化处理及资源综合利用方面的研究;E-mail: tomato134@163.com

Study on preparation of ammonium dihydrogen phosphate from phosphoric acid waste solution of chemical polishing of aluminum and aluminum alloy

Tang Yuzhong(),Zheng Shuaifei,Zhang Qingxi,Xue Zhiqiang,Qin Jishan   

  1. Shenzhen Shentou Environmental Technology Co.,Ltd.,Shenzhen 518049,China
  • Received:2020-08-16 Online:2021-05-10 Published:2021-05-12

摘要:

提出了以铝及铝合金化学抛光磷酸废液为研究对象有效回收磷资源制备工业级磷酸二氢铵(MAP)的工艺方法。实验结果表明,将原废液稀释至质量浓度为95 g/L,反应温度为80 ℃,氨水中和除杂终点pH为4左右,除杂反应时间为1 h,将过滤液用氨水二次调节pH至7~8后蒸发浓缩,浓缩液加入纯度较高的磷酸废液回调pH至4~5,冷却结晶后85 ℃烘干得到MAP产品,产品经主含量、XRD分析,结果显示各项指标均符合HG/T 4133—2010《工业磷酸二氢铵》一级产品标准的要求。

关键词: 化学抛光, 磷酸废液, 氨水, 磷酸二氢铵, 蒸发浓缩

Abstract:

A methodology for producing industrial grade ammonium dihydrogen phosphate(MAP) through effective recycle of phosphorus from phosphoric acid waste solution of chemical polishing of aluminum and aluminum alloy was proposed.The ex-perimental results showed that when the concentration of original waste solution was diluted to 95 g/L,the reaction tempera-ture was 80 ℃,the pH of the end point of neutralization and impurity removal was about 4,the impurity removal reaction time was 1 h,the pH of the filter liquid was adjusted to 7~8 by ammonia,and then evaporated and concentrated,the concentrated liquid was added with high purity phosphoric acid waste liquid to adjust the pH to 4~5,the MAP products were cooled,crys-tallized and dried at 85 ℃.Through the analysis of main content and XRD,the result showed that all indexes met the first-grade product standard of HG/T 4133—2010,Industrial Ammonium Dihydrogen Phosphate.

Key words: chemical polishing, phosphoric acid waste solution, ammonia, ammonium dihydrogen phosphate, evaporation and concentration

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