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 ›› 2016, Vol. 48 ›› Issue (3): 46-.

• 论文 • 上一篇    下一篇

磷酸二氢铵结晶过程影响因素研究

刘 飞1,2,解 田1,2,郑 润3,杨 帆1,2   

  1. 1.中低品位磷矿及其共伴生资源高效利用国家重点实验室,贵州贵阳 550005;
    2.瓮福(集团)有限责任公司;3.贵州大学化学与化工学院
  • 出版日期:2016-03-10 发布日期:2016-03-11

Study on influencing factors of ammonium dihydrogen phosphate crystallization process

Liu Fei1,2,Xie Tian1,2,Zheng Run3,Yang Fan1,2   

  1. 1.State Key Laboratory of Efficient Utilization of Medium-Low Grade Phosphate Ore and Associated Resources,
    Guiyang 550005,China;2.Wengfu(Group) Co. Ltd.;3.School of Chemistry and Chemical Engineering,Guizhou University
  • Online:2016-03-10 Published:2016-03-11

摘要: 以滴灌肥用晶体磷酸二氢铵为原料,采用间歇冷却结晶的方式制备出高纯度的磷酸二氢铵(电池级),可以作为生产锂离子电池正极材料磷酸铁锂的原料。电池级磷酸二氢铵结晶过程最佳工艺条件:降温速率为每 10 min降温2 ℃、搅拌转速为320 r/min、助长剂用量为4.0 g、结晶终点温度为46 ℃。在最佳工艺条件下制备出的磷酸二氢铵达到锂离子电池正极材料磷酸铁锂对原料的要求。

关键词: 磷酸二氢铵, 结晶, 影响因素

Abstract: High purity ammonium dihydrogen phosphate(battery grade),which can be used as one of the raw materials for the production of lithium iron phosphate,was prepared by batch cooling crystallization,with ammonium dihydrogen phosphate crystals used for drip irrigation fertilizer as raw material.The optimum crystal process conditions of battery grade ammonium dihydrogen phosphate were as follows:cooling rate was 2 ℃ per 10 min,stirring speed was  320 r/min,growth substance dosage was 4.0 g,and the final crystallization temperature was 46 ℃.Under the optimum conditions,battery grade ammonium hydrogen phosphate could meet the raw material requirements of lithium iron phosphate cathode material.

Key words: ammonium dihydrogen phosphate, crystallization, influencing factors

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