Microfluidic solvent extraction of Ce (III) and Pr (III) from a chloride solution using EHEHPA (P507) in a serpentine microreactor

作者：Yin, Shaohua^*; Chen, Kaihua; Srinivasakannan, C.; Li, Shiwei; Zhou, Junwen; Peng, Jinhui; Zhang, Libo^*

来源：Hydrometallurgy, 2018, 175: 266-272.

DOI：10.1016/j.hydromet.2017.12.009

• Extraction and separation
• Pr/Ce
• Microreactor
• Mass transfer

Extractive and separation of Pr/Ce using a Y-junction serpentine microreactor, with 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester (EHEHPA, P507), has been investigated. The results clearly indicate separation factor of Pr/Ce ( > 3) is to be higher in the microfluidic extraction as compared to separation factor of around 2 to 3 for batch systems. The optimized residence time of 12 sin micro-flow is much less than that in batch system (congruent to 300 s). The extraction rates for Pr and Ce are found to match first order kinetics with the rate constants being 0.2649 s(-1) and 0.2279 s(-1), respectively, which are > 20 times higher than those for batch extraction. The volumetric mass transfer coefficients (KLa) for various operating conditions vary between 0.007 and 0.57 s(-1) which decrease with increase in channel size (channel width and length). The experimentally mass transfer coefficients are compared with those with conventional extractors such as mixer settler and centrifugal extractors.

• 出版日期2018-1
• 单位昆明理工大学