Continuous lithium extraction from salt lake brine using granular highly hydrophilic aluminum-based lithium adsorbent

CAO Yujiao; YANG Ying; LIN Sen; YU Jianguo

doi:10.11949/0438-1157.20260839

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Continuous lithium extraction from salt lake brine using granular highly hydrophilic aluminum-based lithium adsorbent

更新时间：2026-08-28

- Continuous lithium extraction from salt lake brine using granular highly hydrophilic aluminum-based lithium adsorbent
- CIESC Journal (2026)
- 作者机构：
  
  1.华东理工大学国家盐湖资源综合利用工程技术研究中心，上海 200237
  2.生态环境部化工过程环境风险评价与控制重点实验室，上海 200237
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20260839
  CLC： TQ115;TB34
- Received：16 June 2026，
  
  Revised：2026-08-18，
  
  Accepted：28 August 2026，
- 稿件说明：
移动端阅览
CAO Yujiao, YANG Ying, LIN Sen, et al. Continuous lithium extraction from salt lake brine using granular highly hydrophilic aluminum-based lithium adsorbent[J/OL]. CIESC Journal, 2026.
DOI：

CAO Yujiao, YANG Ying, LIN Sen, et al. Continuous lithium extraction from salt lake brine using granular highly hydrophilic aluminum-based lithium adsorbent[J/OL]. CIESC Journal, 2026. DOI： 10.11949/0438-1157.20260839.

摘要

铝基层状锂吸附剂作为我国低品位卤水提锂的关键分离材料，目前已广泛应用于青海多个盐湖锂分离提取工业装置，但是其粉体成型过程工艺对锂吸附速率及提取率仍有较大负面影响。本文系统考察了新型颗粒状高亲水性铝基锂吸附剂的连续提锂过程，研究了不同流速下固定床吸附/解吸性能，并设计了20柱3区连续提锂工艺进行锂分离提取效果评价。结果表明，吸附剂在较高操作流速下，可实现Li

的高效吸附与解吸，相比于传统颗粒，卤水处理量能够提升至原来的3倍，高解吸流速对解吸液中Li

浓度影响较小，相同时间内的解吸量能够提高至原来的3.01倍。在长周期连续提锂过程中，锂提取率大于90%，18次“吸附-冲洗-解吸”卤水提锂循环的锂吸附量稳定维持在7.23-8.80 mg/g；在连续提锂工艺的80次吸附柱切换运行过程中，解吸液Mg/Li质量比可由原料卤水的248迅速降低至0.5以下，实现了盐湖锂资源的高效选择性分离。

Abstract

Layered aluminum-based lithium adsorbents

as key separation materials for lithium extraction from low-grade brines in China

have been widely

applied in industrial lithium extraction processes at several salt lakes in Qinghai. However

the powder granulation process still has a significant adverse effect on the lithium adsorption kinetics and recovery. This study systematically investigates continuous lithium extraction using a novel granular highly hydrophilic aluminum-based lithium adsorbent. Fixed-bed adsorption and desorption performances at different flow rates were investigated

and a 20-column three-zone continuous lithium extraction process was designed to evaluate its lithium separation performance. The results show that the adsorbent achieves efficient Li

adsorption and desorption at relatively high operating flow rates. Compared with conventional granules

the brine treatment capacity can be increased threefold

and a high desorption flow rate has little effect on the Li

concentration in the eluent

with the amount of Li

desorbed within the same period increasing by a factor of 3.01. During long-term continuous lithium extraction

the lithium recovery remained above 90%

and the lithium adsorption capacity remained stable at 7.23-8.80 mg/g over 18 adsorption-rinsing-desorption cycles. During 80 adsorption-column switching operations in the continuous extraction process

the Mg/Li mass ratio was rapidly reduced from 248 in the feed brine to below 0.5 in the lithium-rich product stream

demonstrating efficient and selective separation of lithium from salt lake brine.

关键词

Keywords

references

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