TY - JOUR AU - Li, Sanxing AU - Chen, Gaoxiang AU - Fan, Chunxin AU - Luo, JianHong PY - 2022/02/02 Y2 - 2024/03/29 TI - Microextraction of lanthanum using a rotating microchannel extractor: Scientific paper JF - Journal of the Serbian Chemical Society JA - J. Serb. Chem. Soc. VL - 87 IS - 4 SE - Chemical Engineering DO - 10.2298/JSC210823080L UR - https://www.shd-pub.org.rs/index.php/JSCS/article/view/11091 SP - 505-518 AB - <p>This work introduced a novel microchannel extractor. The extraction system was intended to extract lanthanum nitrate aqueous solution with 2-ethyl­hexyl phosphoric acid-2-ethylhexyl ester (EHEHPA). Different feeding methods and inner rotors were explored first. The results showed that parallel feeding and inner rotors engraved with spiral stripes were more favorable for extract­ion. Next, the effect of various factors on the extraction was explored, inc­lud­ing the aqueous phase pH, rotational inner rotor speed (<em>R</em>) and the fluid volu­metric flow rate (<em>Q</em>). The results showed that these factors are closely related to the extraction. Finally, the experiment was verified by CFD numerical simul­ation, the simulation result was consistent with the experiment. In this device, active mixing was introduced into the microchannel extraction, which signific­antly improved the extraction efficiency. Under certain conditions, the extract­ion efficiency of this device exceeded stirring extraction equilibrium. More­over, the extraction in the device is faster than with conventional stirring ext­ract­ion. These advantages provide a possibility for highly efficient extraction of rare earth elements.</p> ER -