Zhi-Yuan Guo, Zhi-Yong Jia
Exploring the lithium resources in concentrated seawater/salt lake brines could provide necessary support for the sustainable development in future. Selective-electrodialysis (S-ED, equipped with monovalent selective ion-exchange membranes) is considered as an effective way to reduce the ratio of magnesium to lithium in concentrated seawater/salt lake brines. However, the effectiveness of the prefractionation of lithium chloride from brine is not clearly investigated, because both seawater and salt lake brines are complex mixtures. Nowadays, only simple systems with binary or ternary cations system have been investigated. Based on a clean production process for the utilization of concentrated seawater/salt lake brine, the prefractionation of LiCl from concentrated seawater/salt lake brines by S-ED was investigated in this work. From the concentrated seawater experiments, it is beneficial to improve the RLi (recovery ratio of Li+) at a higher voltage, but an excessively high working voltage is adverse to the preliminary separation between Li+ and Mg2+; a bigger VC/VD (initial volume ratio of concentrating and desalting solution) is favorable to increase RLi and reduce ESEC (specific energy consumption of Li+). At the optimal voltage of 7 V and VC/VD of 0.6, the mole ratio of LiCl: MgCl2: MgSO4 increased from 1: 2.227: 2.463 to 1: 1.461: 0.085.
@article{6a5a0c13-97e1-4dec-9395-a1c1a4626cb4,
title={Prefractionation of LiCl from concentrat},
author={Zhi-Yuan Guo and Zhi-Yong Jia},
year={2026},
language={en}
}TY - JOUR TI - Prefractionation of LiCl from concentrat AU - Zhi-Yuan Guo AU - Zhi-Yong Jia PY - 2026 LA - en ER -
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