通过协同的二甲基乙醇和Na2SO4 分数结晶的方法回收兰化硫酸盐
Chloe Tolbert1, Caleb Stetson1, Denis Prodius2
1Mineral and Molecular Separations Department, Idaho National Laboratory, Idaho Falls, Idaho, 83415, USA.
ChemSusChem
|October 6, 2025
概括
这项研究展示了一种从磁体废物中回收化物 (Lns) 的新方法. 将硫酸与二甲基以太驱动的分量结晶相结合,将Ln度显著降低到百万分之一的水平.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 兰化物 (Lns) 对于先进技术,如高效率电机至关重要.
- 工业废物中存在Lns,但通常度较低,阻碍了回收.
- 需要有效的回收方法来解决Ln稀缺性和环境问题.
研究的目的:
- 开发一种协同方法,从水性磁铁液中回收类.
- 为了在百万分之一 (ppm) 范围内达到兰他化物度.
- 在回收过程中利用金属生产的副产品硫酸.
主要方法:
- 用硫酸 (Na2SO4) 和二甲基乙醇驱动的微分结晶 (DME-FC) 处理水性磁铁液.
- 研究Na2SO4和DME-FC结合对Ln溶性的协同效应.
- 使用分析技术测量最终的Ln度.
主要成果:
- 合并的Na2SO4 + DME-FC工艺协同减少了Ln溶解度的700-27,000倍.
- 关键兰坦化物 (Pr,Nd,Sm,Gd,Dy,Ho) 的最终度在2至200ppm之间.
- 与单个治疗方法相比,联合方法实现了99.8%的Ln度降低.
结论:
- 纳2SO4和DME-FC的协同应用为高效的化物回收提供了有效的战略.
- 这种方法可以从低度废物流中回收有价值的化物.
- 该过程通过使用副产品 (Na2SO4) 进行关键金属回收来整合废物回收.
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