Page 162 - CW E-Magazine (13-5-2025)

Special Report Special Report

should also be considered along with source. Different types of MMM-MOFs three-column batch distillation (TCBD).
others covered in this column. (ACS have been studied in polyether sulfone Optimisation was done. Thermal integra-
Sustainable Chem. Eng., 2024; DOI: for recovery of Co and Ni from solutions tion was adopted for energy saving. A
10.1021/acssuschemeng.4C05906). containing common interfering ions. control strategy is suggested to make the
The above membranes work well with process robust and ECH is 99.9 mol%+.
Recycling of critical metals MIL-53(A)@PES being the one giving TCBD process has better economic and
from light-emitting diodes better performance. One membrane environmental benefi ts. (J. Chem. Tech-
(LEDs) gives selective recovery of Co. (ACS nol. Biotechnol., 2024; DOI: 10.1002/
Sustainable Chem. Eng., 2024; DOI: jctb.4614).
M. Peer et al have referred to the wide 10.1021/acssuscemeng.4C03427). show good adsorption effi ciency and
use of energy saving LEDs which use excellent regeneration. Ionic-COF-Cl Thermal distillation of
different materials including metals The chemistry of Metal- towards Au ion exhibits a selectivity hypersaline waters towards
3+
like In (Indium) or rare earth elements. Organic-Frameworks (MOFs) of 39,000 and 4.600 times higher than zero liquid discharge via
These authors fi rst use a thermochemical for multi-component gas that of Cu and Ni ions, respectively. spontaneously siphon-
2+
2+
step to recover the critical metal In with separation DFT calculations were done. (Angew. channelling crystallised salt
of vital importance in human body for a treatise on different types of amino Chem. Intl. Ed., 2024; DOI: 10.1002/
speedy desorption of CO , but it is not acids. These systems do allow faster L. Yang et al have studied the separation anie.202414366). Y. Zhang et al have designed passive
2
heat stable.] rates of absorption and lower energy of multi-component mixtures which membrane-free distiller for hypersaline
consumption in regeneration. (Ind. Eng. are different from ideal two-component Green and effi cient separation desalination with high stability, easy
I. Iliuta and M.C. Iliuta have reported the Chem. Res., 2024; DOI: 10.1021/acs. mixtures. operation and low cost. A siphon channel
use of immobilised CAE in a packed-bed iecr.4C01813). of V and Cr from high Cr/V is constructed with the capillary wick
microreactor attached on open-cell foam slag and the crystallised salt, which can
packings. 3D two-phase fl ow model was Investigation of effi cient and
adopted. There is a remarkable enhanced reversible CO capture using W. Liu et al have referred to V and Cr
mass transfer of CO over large interfa- 1,5-Diazabicyclo(4.3.0) non-5- HCl-containing vapor from PVC as as strategic resources due to their out-
2
2
cial area. (Ind. Eng. Chem. Res., 2024; chlorine source. Subsequently, the LED standing physico-chemical properties.
DOI: 10.1021/acs.iecr.4C02482). ene (DBNE) based quasi-deep residue is leached with H SO and H O , Different approaches can be made for
eutectic solvents (QDESs)
4
2
2
2
Investigation of CO rapid which gives leachate containing heavy the title recovery: Selective extraction
of one of the elements from the slag and
2
phase change absorbent B. Jiang et al have come out with a rare earth element, lutetium, which in co-extraction of V and Cr into solution
system based on amino acid series of QDESs based on proton donors turn, can be extracted with n-octanol This mini-review highlights the recent followed by separation.
salts and ether solvents with different pKa values and organic and tributylphosphate. (Chemie. Ing. advances in the title systems, including
[This column has earlier covered papers superbase which were synthesized for Technic, 2024; DOI: 10.1002/cite. multi-component impurities removal. This comprehensive review provides
where the absorbent undergoes phase title work. DBNE – ethylene glycol (EG) 202400043). Typical cases of C , C , and C hydro- insights into the separation methods.
8
2
4
change and this allows lower energy 1:1 was used which could take up 0.214 carbon separations are covered. Future (Green Chem., 2024; DOI: 10.1039/
gm CO per gm QDES at 40°C and 20 Effi cient Ni and Co
consumption in the regenerator.] 2 directions are given. (Angew. Chem. D4GC02192D).
KPa. The addition of imidazole was also recovery by Metal-Organic- Intl. Ed., 2024; DOI: 10.1002/anie.
Z. Ma et al have used different amino explored. FTIR and NMR spectroscopic Framework-(MOF)- based 202414503). Evaluation and control of
acid salts with different chain lengths methods were used along with quantum Mixed Matrix Membranes energy-effi cient processes for
and alcohol ether solvents. There is chemical calculations. This system (MMM-MOFs) Anion-regulated ionic separating epichlorohydrin
Covalent Organic Framework (ECH) – oriented quaternary
The use of EVs has resulted in large (COFs) for highly selective system
consumption of critical metals Co and recovery of gold from e-waste
Ni and used batteries can be a useful
F. Qi et al have referred to multiple
J. Zhao et al have referred to the avail- azeotropes that are formed in synthe-
ability of gold from e-waste and leaching sized product based on ECH. Phase
solutions and thus recycling of gold (Au) equilibrium study was done. This work
is extremely signifi cant for sustainabi- analyses three separation schemes
lity. These authors have designed ionic based on the above study which include
COFs (COF-Cl /Br /AcO , and SO by hybrid extractive distillation (HED),
2-
-
-
-
4
anion regulation strategy. These all pressure swing distillation (PSD), and
162 Chemical Weekly May 13, 2025 Chemical Weekly May 13, 2025 163
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