Efficient separation of thorium from rare earths with a hydrogen-bonded oligoaramide extractant in highly acidic media

2015 ◽  
Vol 305 (2) ◽  
pp. 543-549 ◽  
Author(s):  
Youjia Wang ◽  
Lei Wu ◽  
Yunchang Yang ◽  
Wen Feng ◽  
Lihua Yuan
Keyword(s):  
Rare Earths ◽  
Acidic Media ◽  
Efficient Separation ◽  
Hydrogen Bonded

Hydrogen‐Bonded Metal‐Nucleobase Frameworks for Efficient Separation of Xenon and Krypton

2022 ◽  
Author(s):  
Ying Liu ◽  
Hui Wu ◽  
Lidong Guo ◽  
Wei Zhou ◽  
Zhiguo Zhang ◽  
...  
Keyword(s):  
Efficient Separation ◽  
Hydrogen Bonded

scholarly journals Highly efficient separation of rare earths from nickel and cobalt by solvent extraction with the ionic liquid trihexyl(tetradecyl)phosphonium nitrate: a process relevant to the recycling of rare earths from permanent magnets and nickel metal hydride batteries

2014 ◽  
Vol 16 (3) ◽  
pp. 1594-1606 ◽  
Author(s):  
Tom Vander Hoogerstraete ◽  
Koen Binnemans
Keyword(s):  
Ionic Liquid ◽  
Solvent Extraction ◽  
Rare Earths ◽  
Metal Hydride ◽  
Permanent Magnets ◽  
Nickel Metal ◽  
Nickel Metal Hydride ◽  
Efficient Separation ◽  
Highly Efficient

The undiluted ionic liquid trihexyl(tetradecyl)phosphonium nitrate was used for cobalt–samarium and nickel–lanthanum separations by solvent extraction.

scholarly journals Efficient separation of rare earths recovered by a supported ionic liquid from bauxite residue leachate

RSC Advances ◽  
2018 ◽  
Vol 8 (22) ◽  
pp. 11886-11893 ◽  
Author(s):  
Dženita Avdibegović ◽  
Mercedes Regadío ◽  
Koen Binnemans
Keyword(s):  
Ionic Liquid ◽  
Liquid Phase ◽  
Rare Earths ◽  
Bauxite Residue ◽  
Base Metals ◽  
Supported Ionic Liquid ◽  
Efficient Separation

Rare earths are separated from base metals in bauxite residue leachate by a supported ionic liquid phase.

scholarly journals Efficient separation of C2 hydrocarbons in a permanently porous hydrogen-bonded organic framework

2018 ◽  
Vol 54 (67) ◽  
pp. 9360-9363 ◽  
Author(s):  
Tae-Ung Yoon ◽  
Seung Bin Baek ◽  
Dongwook Kim ◽  
Eun-Jung Kim ◽  
Wang-Geun Lee ◽  
...  
Keyword(s):  
Gas Mixtures ◽  
Flow Conditions ◽  
Mixture Flow ◽  
Efficient Separation ◽  
C2 Hydrocarbons ◽  
Organic Framework ◽  
Hydrogen Bonded

A microporous hydrogen-bonded organic framework HOF-BTB efficiently separates C2 hydrocarbons from C2/CH4 binary gas mixtures under dynamic mixture flow conditions.

Efficient separation of transition metals from rare earths by an undiluted phosphonium thiocyanate ionic liquid

2016 ◽  
Vol 18 (23) ◽  
pp. 16039-16045 ◽  
Author(s):  
Alok Rout ◽  
Koen Binnemans
Keyword(s):  
Ionic Liquid ◽  
Rare Earth ◽  
Transition Metal ◽  
Transition Metals ◽  
Metal Ions ◽  
Rare Earths ◽  
Transition Metal Ions ◽  
Rare Earth Ions ◽  
Efficient Separation

Efficient separation of transition metal ions from their mixture with rare-earth ions was achieved by extraction with a phosphonium thiocyanate ionic liquid.

Hydrogen‐Bonded Metal‐Nucleobase Frameworks for Efficient Separation of Xenon and Krypton

2022 ◽  
Author(s):  
Ying Liu ◽  
Hui Wu ◽  
Lidong Guo ◽  
Wei Zhou ◽  
Zhiguo Zhang ◽  
...  
Keyword(s):  
Efficient Separation ◽  
Hydrogen Bonded

Efficient Separation of Hard Actinides from Rare Earths using the Functionalised Silica Gels

2021 ◽  
pp. 134221
Author(s):  
Amrita Das ◽  
K. R. S. Chandrakumar ◽  
Bhaskar Paul ◽  
Jagannath Gupta ◽  
Nidhi Gupta ◽  
...  
Keyword(s):  
Rare Earths ◽  
Silica Gels ◽  
Efficient Separation

The chemistry of N,N′-dimethylformamidine. III. Tautomerism and hindered rotation

1978 ◽  
Vol 56 (11) ◽  
pp. 1470-1476 ◽  
Author(s):  
James D. Halliday ◽  
E. Allan Symons ◽  
Patrick E. Bindner
Keyword(s):  
Acid Catalysis ◽  
Proton Nmr ◽  
Cyclic Dimer ◽  
Acidic Media ◽  
Hindered Rotation ◽  
Temperature Range ◽  
Infrared Studies ◽  
Cis Isomer ◽  
Hydrogen Bonded

Proton nmr and infrared studies of neat N,N′-dimethylformamidine (DMFA) have shown that the cis isomer 1 is present exclusively and that it undergoes tautomerism. At 25 °C, ktaut = 8.2 × 102 s−1, Ea = 41.5 ± 1.5 kJ mol−1, ΔH≠ = 39.1 ± 1.5 kJ mol−1, and ΔS≠ =−57.5 ± 5.0 J mol−1 K−1. The tautomerism is proposed to occur through a hydrogen-bonded cyclic dimer. The effects of solvent on the tautomeric rate in DMFA have also been investigated for CD3NH2 and CDCl3 solutions.Potassium N,N′-dimethylformamidide (PDMFA) in CD3NH2 does not exhibit hindered rotation about the single C—N bond on the nmr lime scale over the temperature range −56 to 25 °C. However, protonated DMFA undergoes hindered rotation about this bond in highly acidic media (97 wt.% H2SO4 at 25 °C, krot = 0.16 × 102 s−1, Ea = 35.4 ± 0.8 kJ mol−1). The acid catalysis is interpreted as occurring through formation of the diprotonated species. The two nitrogens in protonated DMFA have different base strengths.

An adaptive supramolecular organic framework for highly efficient separation of uranium via an in situ induced fit mechanism

2015 ◽  
Vol 3 (47) ◽  
pp. 23788-23798 ◽  
Author(s):  
Bo Li ◽  
Chiyao Bai ◽  
Shuang Zhang ◽  
Xiaosheng Zhao ◽  
Yang Li ◽  
...  
Keyword(s):  
Ion Recognition ◽  
Induced Fit ◽  
Recognition Mechanism ◽  
Efficient Separation ◽  
Highly Efficient ◽  
Organic Framework ◽  
Hydrogen Bonded

The as-synthesized adaptive supramolecular organic framework (MA–TMA) filled with abundant hydrogen-bonded N-/N and N-/O-heterocyclic motifs exhibits remarkable ability for highly efficient separation of uranium via an in situ “induced-fit” ion recognition mechanism.

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