摘要
提出了一种新颖的阳离子膜电解制备氧化钕的方法。以氯化钕溶液为原料,首先经过电解转化沉淀析出氢氧化钕,再经煅烧获得氧化钕。循环伏安测试和热力学分析结果表明,氯化钕溶液电解制备氢氧化钕过程是电解脱酸和氢氧化钕沉淀析出的耦合过程,两者既相互促进又相互制约;同时研究了氯化钕溶液初始浓度、电流密度和电解时间对电解过程电流效率的影响,结果表明,当氯化钕溶液初始浓度为0.3 mol/L,电流密度为250 mA/cm^(2),电解时间为60 min时,电流效率为92%。电解产物氢氧化钕经过煅烧可获得由大量棒状晶体团聚而成的氧化钕,颗粒中值粒径处于19.6~23.5μm之间。本研究为氧化钕的制备提供了一个新的思路。
A novel method for preparing neodymium oxide by cationic membrane electrolysis was proposed in this paper.With a neodymium chloride solution as the raw material,neodymium hydroxide was precipitated by electrolysis conversion,and the neodymium oxide was obtained by calcination.The results of cyclic voltammetry and thermodynamic analysis show that the preparation process of neodymium hydroxide by electrolyzing a neodymium chloride solution involves the coupling of electrolytic deacidification and neodymium hydroxide precipitation,and the two processes promote and restrict each other.The influences of the initial concentration,current density and electrolysis time of the neodymium chloride solution concentration on the current efficiency of the electrolysis process were also investigated.The results show that the current efficiency reaches 92%when the neodymium chloride solution has an initial concentration of 0.3 mol/L,a current density of 250 mA/cm^(2) and an electrolysis time of 60 min.The electrolysis product neodymium hydroxide is calcined to obtain neodymium oxide formed by agglomeration of a large number of rod-shaped crystals,and the median particle size of the particles is between 19.6μm and 23.5μm.This research provides a new idea for the preparation of neodymium oxide.
作者
刘江
张廷安
豆志河
曹亦俊
LIU Jiang;ZHANG Tingan;DOU Zhihe;CAO Yijun(Research Center for Green Metallurgical Processing and Process Processing,Zhengzhou University,Zhengzhou 450001,China;Key Laboratory for Ecological Utilization of Multimetallic Mineral,Ministry of Education,Northeastern University,Shenyang 110819,China)
出处
《有色金属科学与工程》
CAS
北大核心
2022年第3期55-62,共8页
Nonferrous Metals Science and Engineering
基金
河南省高校科技创新团队资助项目(19IRTSTHN028)。
关键词
阳离子膜
电解
氧化钕
电流效率
cationic membrane
electrolysis
neodymium oxide
current efficiency
