摘要
为了寻找一种稀土绿色冶金工艺,对聚甲基膦酸乙二醇酯(PEMP)萃取剂在稀土萃取中的性能进行探究,考察稀释剂种类、萃取剂浓度、体系温度以及初始水溶液酸度等对萃取镧的影响。结果表明,萃取过程是放热过程,在弱酸性条件下萃取La(Ⅲ)效果最佳,从而避免了使用强酸介质的中性萃取剂所带来的环境污染问题。萃取过程中盐析剂的加入有利于镧的萃取,在低酸度条件下,有利于La(Ⅲ)和其它稀土离子的分离。在一定浓度范围内,PEMP浓度的增大有利于La(Ⅲ)的萃取,萃取机理是中性络合萃取。
Extraction performance of polyphosphate(PEMP)on rare earth was studied to find a green metallurgy process of rare earth.Effects of diluent type,initial acidity of aqueous solution,system temperature,and concentration of extractant on extraction of lanthanum were investigated.The results show that extraction process is an exothermic process and has the best extraction of La(Ⅲ)under weakly acidic conditions,thereby avoiding environmental pollution caused by application of neutral extractant with strong acid media.It is beneficial to extract lanthanum with addition of salting-out agent and separate La(Ⅲ)from other rare earth ions at low acidity.Within a certain concentration of La(Ⅲ),it is beneficial to extract La(Ⅲ)when increase of extractant concentration of PEMP,and extraction of La(Ⅲ)is neutral complex mechanism.
作者
付春燕
杜朝军
杨幼明
FU Chun-yan;DU Chao-jun;YANG You-ming(Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China;Institute of Engineering Research,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China;Nanyang Research Institute of Zhengzhou University,Nanyang Institute of Technology,Nanyang 473004,Henan,China;Innovation Academy for Green Manufacture,Chinese Academy of Sciences,Beijing 100190,China)
出处
《有色金属（冶炼部分）》
CAS
北大核心
2020年第11期50-54,共5页
Nonferrous Metals（Extractive Metallurgy)
基金
中国科学院绿色过程制造创新研究院稀土产业基金项目(IAGM2020DB10)。
