Application of ionic liquid in extraction and separation of rare earth

doi:10.11949/0438-1157.20200677

Abstract

Abstract:

The extraction and separation of rare earth elements is one of the key steps to obtain high-purity single rare earths. The development of new materials and new processes with high-efficiency separation capabilities for rare earth elements is a hot spot for scientific and technological workers worldwide. As a representative new material, ionic liquid has unique physical and chemical properties such as non-volatile, non-flammable, good stability, and adjustable structural properties. In recent years, its application in the field of rare earth element extraction and separation has received extensive attention.This paper provides a systematical review of the publications in recent years reporting the application of ILs in extraction and separation of rare earth (RE) that is essential to obtain high-purity RE products. The ILs-based extraction and separation by use of non-functional and/or functional ILs were here reviewed and discussed in terms of extraction/stripping behaviors, separation performance and mechanisms. The challenges and future directions for the development and application of ILs-based extraction on RE separation were discussed finally.

Key words: rare earth, extraction, separation, ionic liquid, green technology, synergistic system

摘要：

稀土元素萃取分离是获得高纯单一稀土的关键步骤之一，开发对稀土元素具有高效分离能力的新材料和新过程是全球科技工作者研究的热点。离子液体作为一类代表性的新材料，因具有不挥发、不易燃、稳定性好、结构性质可调等独特的物理化学性质，近年来在稀土元素萃取分离领域的应用受到广泛关注。在稀土元素萃取分离过程中，离子液体不仅可用作萃取剂，也可作为稀释剂、协萃剂或同时作为萃取剂和稀释剂。系统评述了离子液体在稀土元素萃取分离中的研究进展，对非功能化离子液体和功能化离子液体在稀土元素萃取分离中的萃取行为和萃取机理进行了分析。同时，对该领域的发展所面临的主要问题和进一步的研究工作进行了探讨。

关键词: 稀土, 萃取, 分离, 离子液体, 绿色技术, 协同体系

CLC Number:

TQ 028.8

Daoguang WANG, Junfeng WANG, Xiangping ZHANG, Yilin WANG, Xiaofei ZHANG. Application of ionic liquid in extraction and separation of rare earth[J]. CIESC Journal, 2020, 71(10): 4379-4394.

王道广, 王均凤, 张香平, 王毅霖, 张晓飞. 离子液体在稀土萃取分离中的应用[J]. 化工学报, 2020, 71(10): 4379-4394.

Figures/Tables 1

References 92

1	Binnemans K, Jones P T, Müller T, et al. Rare earths and the balance problem: how to deal with changing markets?[J]. J. Sustain. Metall., 2018, 4(1): 126-146.
2	Wang K, Adidharma H, Radosz M, et al. Recovery of rare earth elements with ionic liquids[J]. Green Chem., 2017, 19(19): 4469-4493.
3	Sholl D S, Lively R P. Seven chemical separations to change the world[J]. Nature, 2016, 532(7600): 435-437.
4	Cheisson T, Schelter E. Rare earth elements: Mendeleev􀆳s bane, modern marvels[J]. Science, 2019, 363(6426): 489-493.
5	Jowitt S M, Werner T T, Weng Z, et al. Recycling of the rare earth elements[J]. Curr. Opin. Green Sustain. Chem., 2018, 13: 1-7.
6	Binnemans K, Jones P T, Blanpain B, et al. Recycling of rare earths: a critical review[J]. J. Clean. Prod., 2013, 51: 1-22.
7	李振民, 刘一力, 孙菊英, 等. 世界稀土需求趋势分析[J]. 稀土, 2017, 38(3): 149-158.
	Li Z M, Liu Y L, Sun J Y, et al. Analysis of the global rare earth consumption trend [J]. Chinese Rare Earths, 2017, 38(3): 149-158.
8	Li D. Development course of separating rare earths with acid phosphorus extractants: a critical review[J]. J. Rare Earths, 2019, 37(5): 468-486.
9	焦芸芬, 何小林, 廖春发, 等. 近十年来重稀土元素分离与提纯技术研究进展[J]. 稀土, 2013, 34(4): 74-79.
	Jiao Y F, He X L, Liao C F, et al. Progress of research on separation and purification of heavy rare earth elements in recent decade[J]. Chinese Rare Earths, 2013, 34(4): 74-79.
10	Chen L, Wu Y, Dong H, et al. An overview on membrane strategies for rare earths extraction and separation[J]. Sep. Purif. Technol., 2018, 197: 70-85.
11	Liu T, Chen J, Li H, et al. Further improvement for separation of heavy rare earths by mixtures of acidic organophosphorus extractants[J]. Hydrometallurgy, 2019, 188: 73-80.
12	许晓芳, 谭全银, 刘丽丽, 等. 稀土元素分离与提纯技术研究现状及展望[J]. 环境污染与防治, 2019, 41(7): 844-851.
	Xu X F, Tan Q Y, Liu L L, et al. A review on development and prospect of rare earth elements separation and purification technologies[J]. Environ. Pollut. Ctrl., 2019, 41(7): 844-851
13	Chen J. Application of Ionic Liquids on Rare Earth Green Separation and Utilization[M]. Heidelberg: Springer, 2016: 12-13.
14	Sun X, Waters K E. Development of industrial extractants into functional ionic liquids for environmentally friendly rare earth separation[J]. ACS Sustain. Chem. Eng., 2014, 2(7): 1910-1917.
15	Matsumiya M, Kikuchi Y, Yamada T, et al. Extraction of rare earth ions by tri-n-butylphosphate/phosphonium ionic liquids and the feasibility of recovery by direct electrodeposition[J]. Sep. Purif. Technol., 2014, 130: 91-101.
16	Ren S, Hou Y, Zhang K, et al. Ionic liquids: functionalization and absorption of SO₂[J]. Green Energy Environ., 2018, 3(3): 179-190.
17	Wang G, Li Z, Li C, et al. In-situ generated ionic liquid catalyzed aldol condensation of trioxane with ester in mild homogeneous system[J]. Green Energy Environ., 2019, 4(3): 293-299.
18	Kubota F, Baba Y, Goto M. Application of ionic liquids for the separation of rare earth metals[J]. Solvent Extr. Res. Dev., 2012, 19: 17-28.
19	Wang L Y, Guo Q J, Lee M S. Recent advances in metal extraction improvement: mixture systems consisting of ionic liquid and molecular extractant[J]. Sep. Purif. Technol., 2019, 210: 292-303.
20	Guo L, Chen J, Shen L, et al. Highly selective extraction and separation of rare earths(Ⅲ) using bifunctional ionic liquid extractant[J]. ACS Sustain. Chem. Eng., 2014, 2(8): 1968-1975.
21	Jensen M P, Neuefeind J, Beitz J V, et al. Mechanisms of metal ion transfer into room-temperature ionic liquids: the role of anion exchange[J]. J. Am. Chem. Soc., 2003, 125(50): 15466-15473.
22	Atanassova M, Kurteva V, Lubenov L, et al. Comparing extraction, synergism and separation of lanthanoids using acidic and neutral compounds in chloroform and one ionic liquid: is the latter always “better”?[J]. RSC Adv., 2014, 4(73): 38820-38829.
23	Huddleston J G, Willauer H D, Swatloski R P, et al. Room temperature ionic liquids as novel media for ‘clean’ liquid-liquid extraction[J]. Chem. Commun., 1998, 16: 1765-1766.
24	Nakashima K, Kubota F, Maruyama T, et al. Ionic liquids as a novel solvent for lanthanide extraction[J]. Anal. Sci., 2003, 19(8): 1097-1098.
25	Nakashima K, Kubota F, Maruyama T, et al. Feasibility of ionic liquids as alternative aeparation media for industrial solvent extraction processes[J]. Ind. Eng. Chem. Res., 2005, 44(12): 4368-4372.
26	Turgis R, Arrachart G, Dubois V, et al. Performances and mechanistic investigations of a triphosphine trioxide/ionic liquid system for rare earth extraction[J]. Dalton T., 2016, 45(3): 1259-1268.
27	Kubota F, Shimobori Y, Baba Y, et al. Application of ionic liquids to extraction separation of rare earth metals with an effective diglycol amic acid extractant[J]. J. Chem. Eng. Jpn., 2011, 44(5): 307-312.
28	Sun X, Bell J R, Luo H, et al. Extraction separation of rare-earth ions via competitive ligand complexations between aqueous and ionic-liquid phases[J]. Dalton T., 2011, 40(31): 8019-8023.
29	Shen Y, Li W, Wu J, et al. Solvent extraction of lanthanides and yttrium from aqueous solution with methylimidazole in an ionic liquid[J]. Dalton T., 2014, 43(26): 10023-10032.
30	Zhao L, Dong Z, Ma G, et al. Solution extraction of several lanthanides from nitric acid with isohexyl-BTP in [C_nmim][NTf₂] ionic liquid[J]. J. Rare Earths, 2015, 33(11): 1182-1188.
31	Rout A, Binnemans K. Influence of the ionic liquid cation on the solvent extraction of trivalent rare-earth ions by mixtures of Cyanex 923 and ionic liquids[J]. Dalton T., 2015, 44(3): 1379-1387.
32	Shimojo K, Kurahashi K, Naganawa H. Extraction behavior of lanthanides using a diglycolamide derivative TODGA in ionic liquids[J]. Dalton T., 2008, 37: 5083-5088.
33	Dietz M L, Dzielawa J A, Laszak I, et al. Influence of solvent structural variations on the mechanism of facilitated ion transfer into room-temperature ionic liquids[J]. Green Chem., 2003, 5(6): 682-685.
34	Hidayah N N, Abidin S Z. The evolution of mineral processing in extraction of rare earth elements using liquid-liquid extraction: a review[J]. Miner. Eng., 2018, 121: 146-157.
35	Sun P, Huang K, Liu H. Separation of adjacent rare earth elements enhanced by “external push-pull” extraction system: an example for the separation of Pr and Nd[J]. Hydrometallurgy, 2019, 189: 105136.
36	Baba Y, Kubota F, Kamiya N, et al. Recent advances in extraction and separation of rare-earth metals using ionic liquids[J]. J. Chem. Eng. Jpn., 2011, 44(10): 679-685.
37	Sun X, Luo H, Dai S. Mechanistic investigation of solvent extraction based on anion-functionalized ionic liquids for selective separation of rare-earth ions[J]. Dalton T., 2013, 42(23): 8270-8275.
38	Rout A, Kotlarska J, Dehaen W, et al. Liquid-liquid extraction of neodymium(Ⅲ) by dialkylphosphate ionic liquids from acidic medium: the importance of the ionic liquid cation[J]. Phys. Chem. Chem. Phys., 2013, 15(39): 16533-16541.
39	Garvey S L, Dietz M L. Ionic liquid anion effects in the extraction of metal ions by macrocyclic polyethers[J]. Sep. Purif. Technol., 2014, 123: 145-152.
40	Turanov A N, Karandashev V K, Yarkevich A N. Extraction of rare-earth elements from hydrochloric acid by carbamoyl methyl phosphine oxides in the presence of ionic liquids[J]. Russ. J. Inorg. Chem., 2018, 63(3): 406-413.
41	Yang F, Baba Y, Kubota F, et al. Extraction and separation of rare earth metal ions with DODGAA in ionic liquids[J]. Solvent Extr. Res. Dev., 2012, 19: 69-76.
42	Yang F, Kubota F, Baba Y, et al. Selective extraction and recovery of rare earth metals from phosphor powders in waste fluorescent lamps using an ionic liquid system[J]. J. Hazard. Mater., 2013, 254/255: 79-88.
43	Yin X, Tian X, Wu Y, et al. Recycling rare earth elements from waste cathode ray tube phosphors: experimental study and mechanism analysis[J]. J. Clean. Prod., 2018, 205: 58-66.
44	Jensen M P, Borkowski M, Laszak I, et al. Anion effects in the extraction of lanthanide 2-thenoyltrifluoroacetone complexes into an ionic liquid[J]. Sep. Sci. Technol., 2012, 47(2): 233-243.
45	Zuo Y, Liu Y, Chen J, et al. The separation of cerium(Ⅳ) from nitric acid solutions containing thorium(Ⅳ) and lanthanides(Ⅲ) using pure [C₈mim]PF₆ as extracting phase[J]. Ind. Eng. Chem. Res., 2008, 47(7): 2349-2355.
46	Gras M, Papaiconomou N, Chainet E, et al. Separation of cerium(Ⅲ) from lanthanum(Ⅲ), neodymium(Ⅲ) and praseodymium(Ⅲ) by oxidation and liquid-liquid extraction using ionic liquids[J]. Sep. Purif. Technol., 2017, 178: 169-177.
47	Zuo Y, Liu Y, Chen J, et al. Extraction and recovery of cerium(Ⅳ) along with fluorine(Ⅰ) from bastnasite leaching liquor by DEHEHP in [C₈mim]PF₆[J]. J. Chem. Technol. Biot., 2009, 84(7): 949-956.
48	Larsson K, Binnemans K. Separation of rare earths by split-anion extraction[J]. Hydrometallurgy, 2015, 156: 206-214.
49	Banda R, Forte F, Onghena B, et al. Yttrium and europium separation by solvent extraction with undiluted thiocynate ionic liquids[J]. RSC Adv., 2019, 9(9): 4876-4883.
50	Regadío M, Vander Hoogerstraete T, Banerjee D, et al. Split-anion solvent extraction of light rare earths from concentrated chloride aqueous solutions to nitrate organic ionic liquids[J]. RSC Adv., 2018, 8(60): 34754-34763.
51	Kumari A, Sahu K K, Sahu S K. Solvent extraction and separation of Nd, Pr and Dy from leach liquor of waste NdFeB magnet using the nitrate form of mextral(R) 336At in the presence of aquo-complexing agent EDTA[J]. Metals Open Access Metallurgy J., 2019, 9(2): 269-284.
52	Wang X, Huang K, Cao W, et al. Enhanced separation of praseodymium and neodymium by kinetic “push and pull” system of [A336][NO₃]-DTPA in a column extractor[J]. J. Rare Earths, 2020, 38(2): 203-212.
53	Sun P, Huang K, Liu H. The nature of salt effect in enhancing the extraction of rare earths by non-functional ionic liquids: synergism of salt anion complexation and Hofmeister bias[J]. J. Colloid Interface Sci., 2019, 539: 214-222.
54	Hunter J P, Dolezalova S, Ngwenya B T, et al. Understanding the recovery of rare-earth elements by ammonium salts[J]. Metals, 2018, 8(6): 465-477.
55	Zhu M, Zhao J, Li Y, et al. An ionic liquid-based synergistic extraction strategy for rare earths[J]. Green Chem., 2015, 17(5): 2981-2993.
56	Xiong Y, Kuang W, Zhao J, et al. Ionic liquid-based synergistic extraction of rare earths nitrates without diluent: typical ion-association mechanism[J]. Sep. Purif. Technol., 2017, 179: 349-356.
57	Zhao J, Yu Z, Liu H. Extraction of rare earths by undiluted [P₆₆₆₁₄][NO₃] and DEHEHP, and the recovery of rare earths from lamp phosphors[J]. J. Mater. Cycles Waste Manage., 2019, 21(6): 1518-1525.
58	Sun X, Ji Y, Hu F, et al. The inner synergistic effect of bifunctional ionic liquid extractant for solvent extraction[J]. Talanta, 2010, 81(4): 1877-1883.
59	Sun X, Luo H, Dai S. Solvent extraction of rare-earth ions based on functionalized ionic liquids[J]. Talanta, 2012, 90: 132-137.
60	Sun X, Do-Thanh C L, Luo H, et al. The optimization of an ionic liquid-based TALSPEAK-like process for rare earth ions separation[J]. Chem. Eng. J., 2014, 239: 392-398.
61	Dong Y, Sun X, Wang Y, et al. The development of an extraction strategy based on EHEHP-type functional ionic liquid for heavy rare earth element separation[J]. Hydrometallurgy, 2015, 157: 256-260.
62	Dutta B, Ruhela R, Yadav M, et al. Liquid-liquid extraction studies of gadolinium with N-methyl-N,N,N-trioctyl ammonium-bis-(2-ethylhexyl) phosphonate—task specific ionic liquid[J]. Sep. Purif. Technol., 2017, 175: 158-163.
63	Quinn J E, Soldenhoff K H, Stevens G W. Solvent extraction of rare earths using a bifunctional ionic liquid(1): Interaction with acidic solutions[J]. Hydrometallurgy, 2017, 169: 306-313
64	Quinn J E, Soldenhoff K H, Stevens G W. Solvent extraction of rare earth elements using a bifunctional ionic liquid(2): Separation of rare earth elements[J]. Hydrometallurgy, 2017, 169: 621-628.
65	Shen L, Chen J, Chen L, et al. Extraction of mid-heavy rare earth metal ions from sulphuric acid media by ionic liquid [A336][P507][J]. Hydrometallurgy, 2016, 161: 152-159.
66	Padhan E, Sarangi K. Recovery of Nd and Pr from NdFeB magnet leachates with bi-functional ionic liquids based on Aliquat 336 and Cyanex 272[J]. Hydrometallurgy, 2017, 167: 134-140.
67	Kumari A, Sinha M K, Sahu S K, et al. Solvent extraction and separation of trivalent lanthanides using Cyphos IL 104, a novel phosphonium ionic liquid as extractant[J]. Solvent Extr. Ion Exch., 2016, 34(5): 469-484.
68	Belova V V, Voshkin A A, Kholkin A I, et al. Solvent extraction of some lanthanides from chloride and nitrate solutions by binary extractants[J]. Hydrometallurgy, 2009, 97(3): 198-203.
69	Pavón S, Fortuny A, Coll M T, et al. Neodymium recovery from NdFeB magnet wastes using Primene 81R·Cyanex 572 IL by solvent extraction[J]. J Environ. Manage., 2018, 222: 359-367.
70	Chen L, Chen J, Li H, et al. Applying basic research on a dialkylphosphoric acid based task-specific ionic liquid for the solvent extraction and membrane separation of yttrium[J]. Sep. Purif. Technol., 2018, 207: 179-186.
71	Wang W, Yang H, Cui H, et al. Application of bifunctional ionic liquid extractants [A336][CA-12] and [A336][CA-100] to the lanthanum extraction and separation from rare earths in the chloride medium[J]. Ind. Eng. Chem. Res., 2011, 50(12): 7534-7541.
72	Yang H, Wang W, Cui H, et al. Extraction mechanism of rare earths with bifuncional ionic liquids(bif-ILs) [A336][CA-12]/[A336][CA-100] in nitrate medium[J]. Chinese J. Anal. Chem., 2011, 39(10): 1561-1566.
73	Dong Y, Guo X, Wang Y, et al. A separation processing for industrial rare earth feed solution by phosphonium ionic liquid type saponification strategy[J]. J. Rare Earths, 2017, 35(3): 290-299.
74	Wang Y, Huang C, Li F, et al. The development of sustainable yttrium separation process from rare earth enrichments using bifunctional ionic liquid[J]. Sep. Purif. Technol., 2016, 162: 106-113.
75	Huang C, Huang B, Dong Y, et al. Efficient and sustainable regeneration of bifunctional ionic liquid for rare earth separation[J]. ACS Sustain. Chem. Eng., 2017, 5(4): 3471-3477.
76	Su X, Guo X, Zhao Z, et al. An efficient and sustainable [P_6,6,6,14]₂[BDOAC] ionic liquid based extraction-precipitation strategy for rare earth recovery[J]. Chem. Eng. Res. Des., 2018, 136: 786-794.
77	Zhou H, Wang Y, Guo X, et al. The recovery of rare earth by a novel extraction and precipitation strategy using functional ionic liquids[J]. J. Mol. Liq., 2018, 254: 414-420.
78	Obón E, Fortuny A, Coll M T, et al. Experimental and modelling studies of neodymium solvent extraction from chloride media with methyl-tri(octyl/decyl)ammonium oleate ionic liquid diluted in kerosene[J]. Hydrometallurgy, 2017, 174: 216-226.
79	Obón E, Fortuny A, Coll M T, et al. Mathematical modelling of neodymium, terbium and dysprosium solvent extraction from chloride media using methyl-tri(octyl/decyl)ammonium oleate ionic liquid as extractant[J]. Hydrometallurgy, 2017, 173: 84-90.
80	Yang H, Chen J, Wang W, et al. Extraction mechanism of rare earths from chloride acidic solution with ammonium-bifunctionalized ionic liquid extractants[J]. Sci. China Chem., 2016, 59: 532-537.
81	Maria L, Cruz A, Carretas J M, et al. Improving the selective extraction of lanthanides by using functionalised ionic liquids[J]. Sep. Purif. Technol., 2020, 237: 116354.
82	Khodakarami M, Alagha L. Separation and recovery of rare earth elements using novel ammonium-based task-specific ionic liquids with bidentate and tridentate O-donor functional groups[J]. Sep. Purif. Technol., 2020, 232: 115952.
83	Chen Y, Wang H, Pei Y, et al. Selective separation of scandium(Ⅲ) from rare earth metals by carboxyl-functionalized ionic liquids[J]. Sep. Purif. Technol., 2017, 178: 261-268.
84	Guo X, Yao W, Chen Y, et al. PEG-functionalized ionic liquids: a class of liquid materials for highly efficient extraction of rare earth metals from aqueous solutions[J]. J. Mol. Liq., 2017, 236: 308-313.
85	Sun X Q, Waters K E. The adjustable synergistic effects between acid-base coupling bifunctional ionic liquid extractants for rare earth separation[J]. AIChE J., 2014, 60(11): 3859-3868.
86	Sun X, Dong Y, Wang Y, et al. The synergistic extraction of heavy rare earth elements using EHEHP-type and BTMPP-type functional ionic liquids[J]. RSC Adv., 2015, 5(61): 49500-49507.
87	Zhao Z, Lyu H, Guo X, et al. The synergistic extraction by combined ammonium and phosphonium type ionic liquids for rare earth elements separation[J]. Hydrometallurgy, 2017, 174: 234-247.
88	Dong Y, Sun X, Wang Y, et al. Reversed micelle synergistic extraction from phosphonium ionic liquid extractants in diluent for rare earth[J]. AIChE J., 2016, 62(6): 2163-2169.
89	Rout A, Binnemans K. Liquid-liquid extraction of europium(Ⅲ) and other trivalent rare-earth ions using a non-fluorinated functionalized ionic liquid[J]. Dalton T., 2014, 43(4): 1862-1872.
90	Rout A, Binnemans K. Solvent extraction of neodymium(Ⅲ) by functionalized ionic liquid trioctylmethylammonium dioctyl diglycolamate in fluorine-free ionic liquid diluent[J]. Ind. Eng. Chem. Res., 2014, 53(15): 6500-6508.
91	Sun X, Waters K E. Synergistic effect between bifunctional ionic liquids and a molecular extractant for lanthanide separation[J]. ACS Sustain. Chem. Eng., 2014, 2(12): 2758-2764.
92	Chen J, Huang C, Wang Y, et al. Extraction behavior of bifunctional ionic liquid [N₁₈₈₈][SOPAA] and TBP for rare earth elements[J]. J. Rare Earths, 2016, 34(12): 1252-1259.

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