膜科学与技术

Position：Home >> Abstract

Electromembrane extraction study of Li(Ⅰ) mass transfer by phosphate-based
semi-interpenetrating network membranes

Authors： LIU Xingfan, MENG Xiaorong

Units： 1. School of Chemistry and Chemical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China; 2. Shaanxi Academy of Membrane Separation Technology, Xi’an 710054, China

KeyWords： semi-interpenetrating network; bis(methacryloyloxyethyl) phosphate; polymer membrane; lithium extraction; mass transfer

ClassificationCode：TQ317.4

year,volume(issue):pagination： 2025,45(6):61-69

Abstract：

The green and low-carbon membrane extraction technology is of great significance in the field of lithium resource extraction. In order to solve the problem of unstable performance of traditional polymer inclusion membranes （PIMs） due to the loss of extractant, in this study, semi-interpenetrating network-type lithium extraction membranes (PSIPN-D) with bonded phosphate ester groups were obtained by UV-initiated polymerization using bis(methacryloyloxyethyl) phosphate (B2MP) as the monomer, poly(vinylidene fluoride-hexafluoropropylene) copolymer (PVDF-HFP) as the base polymer backbone, and dioctyl phthalate (DOP) as the plasticizer. The membrane composition of PSIPN-D was optimized, and the influence laws of two-phase solution environment and external field voltage on the lithium extraction efficiency of PSIPN-D were investigated, and the mass transfer mechanism of PSIPN-D was studied. The results showed that the mass transfer of Li(Ⅰ) by PSIPN-D was an ion-exchange mechanism; an increase in the content of B2MP was favorable for the improvement of the mass transfer rate, but an excessive amount would lead to agglomeration due to excessive cross-linking; the electric field could effectively strengthen the mass transfer rate of Li(Ⅰ), but it would reduce the lithium selectivity of PSIPN-D. The optimized PSIPN4/3-D3.5 membrane showed a permeability coefficient (P) of 1.66 μm/s for Li(Ⅰ) at 10 V, and a membrane efficiency of 504.94 mg/(m2·h) for 200 mg/L lithium solution, and the P value did not decay in 10 consecutive cycles, which demonstrated an excellent stability and high efficiency of lithium extraction.

Funds：

国家重点研究发展计划项目(2022YFC2904304-01)

AuthorIntro：

刘星凡（2000-），女，陕西西安人，硕士研究生，主要研究方向为膜分离.

Reference：

[1]Tabelin C B, Dallas J, Casanova S, et al. Towards a low-carbon society: a review of lithium resource availability, challenges and innovations in mining, extraction and recycling, and future perspectives[J]. Miner Eng, 2021, 163: 106743.
[2]陆雅萌, 王建英, 王朵, 等. 聚合物包容膜及其在萃取分离中的研究进展[J]. 膜科学与技术, 2020, 40(5): 136-143.
[3]Zhou W, Li Z, Bi Q, et al. Extraction of lithium from brine with a high Mg/Li ratio using polymer inclusion membrane containing tri-n-butyl phosphate and ionic liquid[J]. J Sust Metall, 2022, 8(4): 1639-1649.
[4]Xu P, Hong J, Qian X, et al. Materials for lithium recovery from salt lake brine[J]. J Mater Sci, 2021, 56(1): 16-63.
[5]Kaczorowska M A. The use of polymer inclusion membranes for the removal of metal ions from aqueous solutions - the latest achievements and potential industrial applications: a review[J]. Membranes (Basel), 2022, 12(11): 25.
[6]Paredes C, de San Miguel E R. Selective lithium extraction and concentration from diluted alkaline aqueous media by a polymer inclusion membrane and application to seawater[J]. Desalination, 2020, 487: 114500.
[7]Kanagasundaram T, Murphy O, Haji M N, et al. The recovery and separation of lithium by using solvent extraction methods[J]. Coord Chem Rev, 2024, 509: 215727.
[8]Zhang C, Mu Y, Zhao S, et al. Lithium extraction from synthetic brine with high Mg2+/Li+ ratio using the polymer inclusion membrane[J]. Desalination, 2020, 496: 114710.
[9]Shen W, Wang D, Tian Y, et al. Highly permeable and selective polymer inclusion membrane for Li+ recovery and underlying enhanced mechanism[J]. J Membr Sci, 2024, 699: 122671.
[10]Meng X, Long Y, Tian Y, et al. Electro-membrane extraction of lithium with D2EHPA/TBP compound extractant[J]. Hydrometallurgy, 2021, 9: 105615.
[11]Li H, Deng Y, Chen J. Recovery of lithium resources from salt lake brines using a novel low dissolution loss extractant of dehehp with FeCl3[J]. Sep Purif Technol, 2024, 341: 126779.
[12]Zhao S, Samadi A, Wang Z, et al. Ionic liquid-based polymer inclusion membranes for metal ions extraction and recovery: Fundamentals, considerations, and prospects[J]. Chem Eng J, 2024, 481: 148792.
[13]张丽, 周杭生, 黄金, 等. 聚合物梯度材料的构筑及性能研究[J]. 复合材料学报, 2022, 39(9): 4244-4258.
[14]O’Bryan Y, Truong Y B, Cattrall R W, et al. A new generation of highly stable and permeable polymer inclusion membranes (PIMs) with their carrier immobilized in a crosslinked semi-interpenetrating polymer network. Application to the transport of thiocyanate[J]. J Membr Sci, 2017, 529: 55-62.
[15]Hoque B, Almeida M I G S, Cattrall R W, et al. Improving the extraction performance of polymer inclusion membranes by cross-linking their polymeric backbone[J]. React Funct Polym, 2021, 160: 104813.
[16]Hoque B, Kolev S D, Cattrall R W, et al. A cross-linked polymer inclusion membrane for enhanced gold recovery from electronic waste[J]. Waste Manage, 2021, 124: 54-62.
[17]Meng X, Li W, Tian Y, et al. Synthesis of trioctyl polyvinyl chloride ammonium, membrane extraction properties, and electrodriven mass transfer behavior of chromium(Ⅵ)[J]. Sep Purif Technol, 2023, 320: 124191.
[18]Misra N, Rawat S, Goel N K, et al. Cellusorb: a high-performance, radiation functionalized cellulose based adsorbent for uranium (Ⅵ) remediation in ground water[J]. Sep Purif Technol, 2023, 322: 124215.
[19]Nghiem L, Mornane P, Potter I, et al. Extraction and transport of metal ions and small organic compounds using polymer inclusion membranes (PIMs)[J]. J Membr Sci, 2006, 281(1/2): 7-41.
[20]孟晓荣, 孙驰, 龙伊文. Cyanex923/TBP/PHEN协同2-噻吩甲酰三氟丙酮对Li（Ⅰ）的电膜萃取研究[J]. 化工学报, 2024, 75(12): 4606-4616.
[21]Hu Y, Su H, Zhu Z, et al. Mechanisms for the separation of Li+ and Mg2+ from salt lake brines using TBP and TOP systems[J]. Desalination, 2024, 583: 117698.
[22]Zeng X, Xu L, Deng T, et al. Polymer inclusion membranes with p507-TBP carriers for lithium extraction from brines[J]. Membranes (Basel), 2022, 12(9): 839.
[23]Xu L, Zeng X, He Q, et al. Stable ionic liquid-based polymer inclusion membranes for lithium and magnesium separation[J]. Sep Purif Technol, 2022, 288: 120626.
[24]Meng X, Sun C, Liu X, et al. Study of electric field-enhanced mass transfer and Li/Mg separation of n, n-bis (1-methylheptyl) acetamide/TBP-NaFeCl4 composite membrane[J]. J Environ Chem Eng, 2024, 12(5): 113847.
[25]Cai C, Yang F, Zhao Z, et al. Promising transport and high-selective separation of Li(Ⅰ) from Na(Ⅰ) and K(Ⅰ) by a functional polymer inclusion membrane (PIM) system[J]. J Membr Sci, 2019, 579: 1-10.

Service：

【Download】【Collect】

《膜科学与技术》编辑部 Address: Bluestar building, 19 east beisanhuan road, chaoyang district, Beijing; 100029 Postal code; Telephone：010-80492417/010-80485372; Fax：010-80485372 ; Email：mkxyjs@163.com