Fast separation of Cu 2+ and Ni 2+ in sulfate solution by Lix984N extraction using a microchannel chip

Green Processing and Synthesis

article

Biquan Xiao¹  Feng Jiang¹  Shaohua Yin¹  Libo Zhang¹  Jinhui Peng¹  Shaohua Ju¹  Lihua Zhang¹  Shixing Wang¹ 

[1] Yunnan Provincial Key Laboratory of Intensification Metallurgy;Key Laboratory of Unconventional Metallurgy, Ministry of Education;National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology;Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology

关键词: copper;    Lix984N;    microreactor;    nickel;    solvent extraction;   

DOI  :  10.1515/gps-2016-0224

来源: De Gruyter

【 摘 要 】

A comparison study about the extraction and separation of Cu 2+ and Ni 2+ with Lix984N in a microchannel reactor and separating funnel has been conducted. The results showed that, in the microchannel reactor, the overall volumetric mass transfer coefficient of copper was 20 times that of nickel, whereas in the separating funnel, it was only 2 times that of nickel. In addition, the separation coefficient of copper and nickel in the microchannel reactor was 5 times that of the conventional one. Typically, at initial pH=2.5, contact time 1.95 s, volume fraction of extractant Lix984N 15% and within 1.9 g l −1 nickel ion concentration, the extraction rate of copper was higher than 95%, but the nickel was hardly extracted. In comparison, it needed almost 50 s to reach a Cu extraction of 95% in the separation funnel, with more than 5% Ni co-extraction rate. Although the microfluid extraction showed excellent extraction performance, there exists a need to further improve its processing capacity to apply it to industrial production. Furthermore, scaling up the microreactor has become increasingly promising under the fast developing 3D printing technology.

【 授权许可】

CC BY