Development of efficient extraction and separation system of rare earth metals by microfluidic device

微流控装置高效萃取分离稀土金属系统的研制

基本信息

批准号：
15560656
负责人：
KUBOTA Fukiko
金额：
$ 2.05万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

项目摘要

Efficient extraction and separation system was developed for rare earth metals on microfluidic device. In the present study, we focused on the mutual separation of rare earth metals, and the separation of Y from Zn as a recycle model of rare earth metals from industrial waste.A stable multiphase flow was successfully created in a microchannel and clear phase separation at the end-junction of the channel was attained.Extraction of metal ions was investigated with an extractant PC-88A using two-phase flow in the microfluidic device. Data on the extraction can be easily obtained in the novel device and extraction and separation of a target metal ion was satisfactorily achieved within a few seconds. It was proved that high extraction efficiency of novel system was due to the effect of the miniaturization of a device and the operational performance could be further advanced depending on channel design.We also established the liquid membrane by three-phase flow constructed in a microfluidic device. In the microfluidic operation, the center organic phase containing PC-88A functions as a liquid membrane. Recovery of a target rare earth metal ion from a feed metal mixture to receiving phase was successfully achieved within a few seconds.A novel extractant, calixarene, and a novel solvent, room temperature ionic liquids(RTILs), have been also developed to construct the efficient separation system for rare earth metals. Calix[4]arene carboxyl derivative extremely enhanced the selectivity between Y and Zn, and RTILs improved the separation efficiency of rare earth metals with a commercial extractant. The introduction of these extractants or solvents to the process was suggested to be very effective for improving separation efficiency.

开发了微流控装置上稀土金属的高效萃取分离系统。在本研究中，我们重点关注稀土金属的相互分离，以及Y与Zn的分离作为工业废物中稀土金属的回收模型。在微通道中成功地创建了稳定的多相流，并在实现了通道的末端连接。在微流体装置中利用两相流研究了萃取剂PC-88A对金属离子的萃取。在新型装置中可以轻松获得有关提取的数据，并且在几秒钟内就可以令人满意地实现目标金属离子的提取和分离。事实证明，新型系统的高提取效率是由于装置小型化的效果，并且根据通道设计可以进一步提高操作性能。我们还通过在微流体装置中构建的三相流建立了液膜。在微流体操作中，含有PC-88A的中心有机相起到液膜的作用。在几秒钟内成功地将目标稀土金属离子从进料金属混合物中回收到接收相。还开发了一种新型萃取剂杯芳烃和一种新型溶剂室温离子液体（RTIL）来构建稀土金属的高效分离系统。杯[4]芳烃羧基衍生物极大地提高了Y和Zn之间的选择性，RTILs提高了商业萃取剂对稀土金属的分离效率。建议在工艺中引入这些萃取剂或溶剂对于提高分离效率非常有效。