Lithium solvent extraction from weak alkaline brine by 2-hydroxy-5-nitro-4-alkoxy-benzophenone and TRPO

IF 3.5 3区 工程技术 Q2 ENGINEERING, CHEMICAL AIChE Journal Pub Date : 2024-12-17 DOI:10.1002/aic.18703
Guimei Zhou, Wenjun Yan, Shufan Yan, Dandan Gao, Debin Zeng, Dongdong Li, Dewen Zeng
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Abstract

Solvent extraction of lithium by β-diketones from alkaline brine has been known to be an efficient process. However, its relatively high working pH, consequently the high alkaline consumption and substantial dissolution loss in raffinate, limit its industrial application. Herein, a novel lithium extractant, i.e., 2-hydroxy-5-nitro-4-n-octoxy-benzophenone (referred to as N531), was proposed, which can extract lithium at relatively lower pH with remarkable low alkaline consumption and dissolution loss. Exactly, the pH corresponding to half lithium extraction is 8.5, and the Li/Na separation factor is ~500. The extractant concentration in the raffinate varied from 0.8 to 9.3 mg L−1, depending on the pH and salinity. An application case was given to extract lithium from the raw brine of Zabuye salt lake, indicating that N531 is a commercially prospective extractant to extract lithium from alkaline brine.
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2-羟基-5-硝基-4-烷氧基二苯甲酮和TRPO萃取弱碱性盐水
用β-二酮从碱性盐水中萃取锂是一种有效的方法。但其工作pH值较高,导致萃余液耗碱量大,溶解损失大,限制了其工业应用。本文提出了一种新型锂萃取剂,即2-羟基-5-硝基-4-n-氧基二苯甲酮(简称N531),该萃取剂可以在较低的pH下提取锂,且碱耗和溶解损失显著降低。准确地说,提取一半锂所对应的pH值为8.5,Li/Na分离系数为~500。浸出液中萃取剂的浓度根据pH和盐度的不同在0.8 ~ 9.3 mg L−1之间变化。以扎布叶盐湖原卤水提锂为例,说明N531是一种具有商业应用前景的碱性卤水提锂剂。
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麦克林
Na2CO3
麦克林
LiCl
麦克林
NaCl
麦克林
H2SO4
麦克林
HCl
麦克林
NaOH
麦克林
Glacial acetic acid
阿拉丁
Dodecane
阿拉丁
Trialkylphosphine oxide
阿拉丁
Dodecane
来源期刊
AIChE Journal
AIChE Journal 工程技术-工程:化工
CiteScore
7.10
自引率
10.80%
发文量
411
审稿时长
3.6 months
期刊介绍: The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering. The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field. Articles are categorized according to the following topical areas: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Inorganic Materials: Synthesis and Processing Particle Technology and Fluidization Process Systems Engineering Reaction Engineering, Kinetics and Catalysis Separations: Materials, Devices and Processes Soft Materials: Synthesis, Processing and Products Thermodynamics and Molecular-Scale Phenomena Transport Phenomena and Fluid Mechanics.
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