Page 167 - CW E-Magazine (25-3-2025)

Special Report

A rapid wrap-up of what’s new in Operations,

Processes and Products

Separation Technology

anion and methyltributylammonium
([N4441] ) cation. This was incorpo-
+
rated in cellulose triacetate (CTA) and
an IL-based membrane was made with
36 wt% [N4441][TTA]. The initial fl ux
of Li at 1.89x10 mol sq. m. per hr is
-2
reported with the separation factor of
Li over the Na and K were about 29 and
38 respectively. Further improvement
was adopted via electrodialysis. (Sepn.
Purfn. Technol., 2024; DOI: 10.1016/j.
seppur.2024.128757).

Fabrication of self-
cleaning nanofi ltration
(NF) membranes through

Capture of SO from ship Extraction of Li interfacial polymerization (IP)
2
exhaust gas by tertiary amine [There is an intense interest in the re- using PEI@CoPc monomer
+
2+
absorbents covery of Li from different type of ores for Mg /Li separation
with respect to Li/Na, Li/Mg, Li/K, and
K. Kim et al have worked on the this column has covered some papers.] Y-S. Li et al have prepared the light-
title problem as SO emission from responsive membranes via IP using
2
ships burning high sulphur fuels faces High-performance ionic water-soluble metal phthalocyanine PEI@
restrictions. These authors report that liquid (IL)-based membranes COPc as aq. phase monomer alone.
2+
+
dimethylaniline (DMA) shows excellent employed for effi cient recovery The selectivity for Mg /Li was 29.5
desorption performance, outperforming of Li for the prepared composite membranes.
other absorbents like amino acids, Further, these composite membranes
ionic liquids, and deep eutectic Y. Zhao et al have reported a novel IL had excellent fouling resistance and
solvents. (Chem. Eng. Tech- with high Li extraction capacity, which self-cleaning performances. The water
nol., 2024; DOI: 10.1002/ceat. was synthesized with the deprotonated permeance was 16.7 litre per sq.m.per
202300328). thenoyl trifluoroacetone ([TTA] ) hour per bar. The membranes have
-
photocatalytic activity. (Chem. Eng.
Jl., 2024, 496, 15 Sep. 153807; DOI:
10.1016/j.cej.2024.153807).

Ion-selective supramolecular
membrane with pH-regulated
smart nanochannels for Li
extraction

N. Gan et al have been inspired by the fi l-
tration function of protein channels and
developed a smart and high-performance

Chemical Weekly March 25, 2025 167

Contents Index to Advertisers Index to Products Advertised