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Microfluidic extraction of uranium from dilute streams using TiAP in ionic liquid as the solvent
Chemical Engineering Research and Design ( IF 3.9 ) Pub Date : 2021-09-08 , DOI: 10.1016/j.cherd.2021.08.038
Nirvik Sen 1 , K.K. Singh 1, 2 , S. Mukhopadhyay 1, 2 , K.T. Shenoy 1
Affiliation  

A microfluidic platform to extract uranium from HNO3 (nitric acid) medium using tri-isoamyl phosphate (TiAP) dissolved (30% v/v) in ionic liquid ([BMIM]PF6) is reported. PTFE microbore tubes serve as the microchannels. The quality of dispersion inside the translucent tubes was observed using a camera. The images obtained are used to understand the observed experimental trends. Overall volumetric mass transfer coefficient was determined considering the microchannel as a differential contactor with co-currently flowing phases. The effects of contact time, flow velocity, organic to aqueous (O/A) ratio and microchannel diameter on mass transfer performance are studied. Effect of different coiling configurations on mass transfer performance was compared. Under optimum conditions, 95.3% of uranium present in the feed (corresponding stage efficiency being 99.2%) could be extracted within a contact time of about 200 s in a single contact. Corresponding (KLa) was 0.024 s−1. Coiling was found to have a significant effect on values of KLa especially at low residence times.



中文翻译:

使用离子液体中的 TiAP 作为溶剂从稀流中微流萃取铀

使用溶解在离子液体 ([BMIM]PF 6 中(30% v/v) 的磷酸三异戊酯 (TiAP)从 HNO 3(硝酸)介质中提取铀的微流体平台) 报道。PTFE 微孔管用作微通道。使用照相机观察半透明管内的分散质量。获得的图像用于了解观察到的实验趋势。考虑微通道作为具有并流相的差动接触器来确定总体积传质系数。研究了接触时间、流速、有机与水 (O/A) 比和微通道直径对传质性能的影响。比较了不同盘管配置对传质性能的影响。在最佳条件下,进料中 95.3% 的铀(相应阶段效率为 99.2%)可以在约 200 秒的接触时间内在单次接触中提取。对应(K大号一个)为0.024小号-1。发现盘绕对 K L a 的值有显着影响,尤其是在低停留时间时。

更新日期:2021-10-29
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