含有顺磁中心的磁性离子液体 (MIL) 因其对外部磁场的响应能力而被广泛认可为可持续溶剂。MIL 的物理化学性质取决于阴离子/阳离子配体和金属中心的选择;正在寻找可以赋予有利特性(例如低粘度)的高度可调配体和前体。先前已显示用作阳离子配体的二甘醇酰胺可形成疏水 MIL,其可同时在阴离子/阳离子中掺入多个镧系元素金属中心。尽管它们增强了磁化率,但尚未彻底研究二甘醇酰胺化学结构修饰对 MIL 物理化学性质的影响。此外,尚未研究与普遍使用的过渡金属形成基于二甘醇酰胺的 MIL 的可能性,并且尚未探索可以同时在阴离子/阳离子中嵌入两种不同类型的金属中心的组合。在这项研究中,通过检查它们与直链和支链二甘醇酰胺的螯合,合成了三十 (30) 种由镧系元素和过渡金属组成的 MIL。发现基于过渡金属的 MIL 具有高达 235°C 的高热稳定性,而镧系元素则为 192°C。虽然由稀土金属中心组成的 MIL
含有顺磁中心的磁性离子液体 (MIL) 因其对外部磁场的响应能力而被广泛认可为可持续溶剂。MIL 的物理化学性质取决于阴离子/阳离子配体和金属中心的选择;正在寻找可以赋予有利特性(例如低粘度)的高度可调配体和前体。先前已显示用作阳离子配体的二甘醇酰胺可形成疏水 MIL,其可同时在阴离子/阳离子中掺入多个镧系元素金属中心。尽管它们增强了磁化率,但尚未彻底研究二甘醇酰胺化学结构修饰对 MIL 物理化学性质的影响。此外,尚未研究与普遍使用的过渡金属形成基于二甘醇酰胺的 MIL 的可能性,并且尚未探索可以同时在阴离子/阳离子中嵌入两种不同类型的金属中心的组合。在这项研究中,通过检查它们与直链和支链二甘醇酰胺的螯合,合成了三十 (30) 种由镧系元素和过渡金属组成的 MIL。发现基于过渡金属的 MIL 具有高达 235°C 的高热稳定性,而镧系元素则为 192°C。虽然由稀土金属中心组成的 MIL
DIGLYCOLAMIDE DERIVATIVES FOR SEPARATION AND RECOVERY OF RARE EARTH ELEMENTS FROM AQUEOUS SOLUTIONS
申请人:UT-Battelle, LLC
公开号:US20220002229A1
公开(公告)日:2022-01-06
Rare earth extractant compounds having the following structure:
wherein R
1
, R
2
, R
3
, and R
4
are independently selected from alkyl groups containing 1-30 carbon atoms and optionally containing an ether or thioether linkage connecting between carbon atoms, provided that the total carbon atoms in R
1
, R
2
, R
3
, and R
4
is at least 12; R
5
and R
6
are independently selected from hydrogen atom and alkyl groups containing 1-3 carbon atoms; and provided that at least one of the conditions (i)-(iv) apply as follows: presence of a distal branched group in at least one of R
1
-R
4
(condition i), asymmetry in R
1
-R
4
(condition ii), presence of amine-containing ring (condition iii), or presence of lactam ring (condition iv). Also described are hydrophobic water-insoluble solutions containing at least one extractant compound of Formula (1), as well as method for extracting rare earth elements from aqueous solution by contacting the aqueous solution with the water-insoluble solution.
Lanthanum(III) and Uranyl(VI) Diglycolamide Complexes: Synthetic Precursors and Structural Studies Involving Nitrate Complexation
作者:Shanmugaperumal Kannan、Morgan A. Moody、Charles L. Barnes、Paul B. Duval
DOI:10.1021/ic7025076
日期:2008.6.2
The synthesis and structural characterization of lanthanum(III) and uranyl(VI) complexes coordinated by tridentate diglycolamide (DGA) ligands O(CH2C(O)NR2)2[R=i-Pr (L1), i-Bu (L2)] are described. Reaction of L with UO2Cl2(H2O) n forms the uranyl(VI) cis-dichloride adducts UO2Cl2L [L=L1 (1a), L2 (1b)], while reaction of excess L with the corresponding metal nitrate hydrate produces [LaL3][La(NO3)6]
Lipophilic diglycolamide compounds for extraction of rare earth metals from aqueous solutions
申请人:UT-Battelle, LLC
公开号:US11040296B2
公开(公告)日:2021-06-22
A method for extracting rare earth metals (e.g., lanthanides and/or actinides) from aqueous solution, the method comprising: (i) acidifying an aqueous solution containing said rare earth metals with sulfuric acid to result in an acidified aqueous solution containing 1-12 M concentration of sulfuric acid; and (ii) contacting the acidified aqueous solution with an aqueous-insoluble hydrophobic solution comprising a rare earth extractant molecule dissolved in an aqueous-insoluble hydrophobic solvent to result in extraction of one or more of the rare earth metals into the aqueous hydrophobic solution, wherein the rare earth extractant molecule has the following structure:
wherein R1, R2, R3, and R4 are independently selected from hydrocarbon groups containing 1-20 carbon atoms, provided that the total carbon atoms in R1, R2, R3, and R4 is at least 12; and R5 and R6 are independently selected from hydrogen atom and hydrocarbon groups containing 1-3 carbon atoms.
一种从水溶液中提取稀土金属(如镧系元素和/或锕系元素)的方法,该方法包括镧系元素和/或锕系元素)的方法,该方法包括(i) 用硫酸酸化含有上述稀土金属的水溶液,以得到含有 1-12 M 浓度硫酸的酸化水溶液;(ii) 将酸化水溶液与不溶于水的疏水性溶液接触,该疏水性溶液包含溶解在不溶于水的疏水性溶剂中的稀土萃取剂分子,从而将一种或多种稀土金属萃取到疏水性溶液中,其中稀土萃取剂分子具有以下结构:
其中R1、R2、R3和R4独立地选自含有1-20个碳原子的烃基,条件是R1、R2、R3和R4中的碳原子总数至少为12;R5和R6独立地选自氢原子和含有1-3个碳原子的烃基。
LIPOPHILIC DIGLYCOLAMIDE COMPOUNDS FOR EXTRACTION OF RARE EARTH METALS FROM AQUEOUS SOLUTIONS
申请人:UT-Battelle, LLC
公开号:US20190344198A1
公开(公告)日:2019-11-14
A method for extracting rare earth metals (e.g., lanthanides and/or actinides) from aqueous solution, the method comprising: (i) acidifying an aqueous solution containing said rare earth metals with sulfuric acid to result in an acidified aqueous solution containing 1-12 M concentration of sulfuric acid; and (ii) contacting the acidified aqueous solution with an aqueous-insoluble hydrophobic solution comprising a rare earth extractant molecule dissolved in an aqueous-insoluble hydrophobic solvent to result in extraction of one or more of the rare earth metals into the aqueous hydrophobic solution, wherein the rare earth extractant molecule has the following structure:
wherein R
1
, R
2
, R
3
, and R
4
are independently selected from hydrocarbon groups containing 1-20 carbon atoms, provided that the total carbon atoms in R
1
, R
2
, R
3
, and R
4
is at least 12; and R
5
and R
6
are independently selected from hydrogen atom and hydrocarbon groups containing 1-3 carbon atoms.
METHODS FOR SEPARATION AND RECOVERY OF RARE EARTH ELEMENTS FROM AQUEOUS SOLUTIONS USING DIGLYCOLAMIDE DERIVATIVES
申请人:UT-Battelle, LLC
公开号:US20220002840A1
公开(公告)日:2022-01-06
A method for extracting rare earth elements from aqueous solution, comprising: (i) acidifying an aqueous solution containing said rare earth elements with an inorganic acid to result in an acidified aqueous solution containing said rare earth elements and containing the inorganic acid in a concentration of 1-12 M, wherein said rare earth elements are selected from lanthanides, actinides, or combination thereof, and (ii) contacting the acidified aqueous solution with an aqueous-insoluble hydrophobic solution comprising a rare earth extractant compound dissolved in an aqueous-insoluble hydrophobic solvent to result in extraction of one or more of the rare earth elements into the aqueous-insoluble hydrophobic solution by binding of the rare earth extractant compound to the one or more rare earth elements, wherein the rare earth extractant compound has the following structure:
provided that at least one of the conditions (a)-(d) applies.