Evaporation–Extraction Membrane Process for the Extraction of Lithium from Salt Lakes

IF 2 Q4 CHEMISTRY, PHYSICAL

Membranes and Membrane Technologies Pub Date : 2022-08-14 DOI:10.1134/S2517751622040059

D. O. Kalmykov, S. V. Makaev, G. S. Golubev, A. V. Volkov

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引用次数: 4

Abstract

In this paper, the process of film distillation with a porous condensing surface (FD-PCS) is studied as applied to the tasks of concentration of lithium-containing solutions. Concentration of solutions is a part of a three-stage lithium extraction cycle that includes softening of the brine by the precipitation of Ca²⁺/Mg²⁺ cations with sodium carbonate (calculated in PHREEQC) followed by an integrated system consisting of a membrane distillation unit and a crystallizer (deposition of NaCl) and membrane extraction (extraction of Li⁺). The productivity flows of the film distillation module are investigated (4.15–7.49 kg m⁻² h⁻¹ at the temperatures of heating of the evaporation surface of 60 and 80°C, respectively). The complex operation of the three-stage system is modeled in Simulink/MATLAB. The modeling of the process based on the experimental and published data shows a higher efficiency of film distillation with a porous condensing surface in comparison with membrane distillation with a porous condensing surface (4.2 kg of lithium versus 1.4 kg over two months of stationary operation of the system).

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蒸发-萃取膜法从盐湖中提取锂

本文研究了多孔冷凝表面膜蒸馏(FD-PCS)工艺在含锂溶液浓缩中的应用。溶液的浓缩是三级锂萃取循环的一部分，包括用碳酸钠沉淀Ca2+/Mg2+阳离子(在PHREEQC中计算)软化盐水，然后是一个由膜蒸馏装置和结晶器(NaCl沉积)和膜萃取(Li+萃取)组成的综合系统。研究了膜蒸馏模块的生产流程(在蒸发表面加热温度分别为60°C和80°C时为4.15-7.49 kg m−2 h−1)。在Simulink/MATLAB中对三级系统的复杂操作进行了建模。基于实验和公开数据的过程建模表明，与多孔冷凝表面的膜蒸馏相比，多孔冷凝表面的膜蒸馏效率更高(系统固定运行两个月后，锂的重量为4.2 kg，锂的重量为1.4 kg)。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Membranes and Membrane Technologies Multiple-

CiteScore

3.10

自引率

31.20%

发文量

期刊介绍： The journal Membranes and Membrane Technologies publishes original research articles and reviews devoted to scientific research and technological advancements in the field of membranes and membrane technologies, including the following main topics:novel membrane materials and creation of highly efficient polymeric and inorganic membranes;hybrid membranes, nanocomposites, and nanostructured membranes;aqueous and nonaqueous filtration processes (micro-, ultra-, and nanofiltration; reverse osmosis);gas separation;electromembrane processes and fuel cells;membrane pervaporation and membrane distillation;membrane catalysis and membrane reactors;water desalination and wastewater treatment;hybrid membrane processes;membrane sensors;membrane extraction and membrane emulsification;mathematical simulation of porous structures and membrane separation processes;membrane characterization;membrane technologies in industry (energy, mineral extraction, pharmaceutics and medicine, chemistry and petroleum chemistry, food industry, and others);membranes and protection of environment (“green chemistry”).The journal has been published in Russian already for several years, English translations of the content used to be integrated in the journal Petroleum Chemistry. This journal is a split off with additional topics.