Page 159 - CW E-Magazine (24-6-2025)

Special Report

(HMFC). 88% yield of HMFC is at 200 ppm. The activated carbon had a over Co-Cu-Al layered double oxide
reported with an exceptional selectivity chemical composition of 64.4 wt%; 33.2 catalysts. These catalysts were properly
of 96%. (NH is N the source to make wt%, and 1.98 wt% of C, O, and H , characterised. Efficient transformation
2
3
the nitrile). (Chem. Eng. Jl., 2025, respectively and had an area of 863 sq. m of HMF to 2,5-bis(hydroxymethyl)
505, 1 Feb., 158869; DOI: 10.1016/j. per gm and a bore volume of 0.476 cc furan (BHMF) and 1,2,6-hexanetriol
St
cej.2024.158869). per gm. (Adsorption, 2025, 31, article no. (HTO) is reported. The CoAl, CuAl,
17; DOI: 10.1007/S10450-024-00574-4). and physically mixed CoAl + CuAl
In situ enhancive and closed- catalyst gave predominantly BHMF
loop chemical recyclable Hydrotalchite-catalysed via hydrogenation of carboxyl group.
high-performance aromatic methylation of isosorbide via The optimal Co CuAl catalyst achieved
5
polyamides from lignin (L) dimethyl carbonate (DMC) efficient and switchable production of
derived Ferulic acid (FA) BHMF (∼91% yield) or 1,2,6-HTO
M.J. Gines-Molina et al have reported (∼72% yield) under tuneable reaction
Y. Liu et al have referred to FA being that MgAl mixed oxides catalyse the conditions. (Green Chem., 2025; DOI:
obtained from L and from this diacids title reaction where DMC acts as a sol- 10.1039/D4GC05875E).
and photosensitive aromatic polyamides vent as well as a methylating agent. The Conversion of Furfural (F)
could be made, which can be recycled catalyst was made via calcination of a into pentanediols
and had outstanding thermal and mecha- commercial hydrotalchite as basic cata- [This subject has been covered in this
nical properties. The degradability arises lyst. At 110°C, the dimethyl derivative column. More studies have come out in
the recent past.]

Three pentanediols (PD) – 1,2 diol, 1,4
diol, 1,5 diol – can be formed under
different conditions. X. Sun et al have
reviewed this subject. Both noble metal
and non-noble metal catalysts have
been used. 1,5 Diol has many uses like
in polyester, polyurethane, plasticisers,
coatings, crop fungicides, etc. In 2020,
1,5 market was $28 mn per annum. 1,2 is
used in production of disinfectants, sur-
factants, polyester fibres, printing inks,
out of the hydrolysis of amide bonds was obtained in 100% yield. (Applied pharma, cosmetics etc. An important
under alkaline conditions. A simple Catalysis A, 2025, 691, 5 Feb; DOI: triazole fungicide, cyclopropazol, uses
acidification and filtration that allow 10.1016/j.apcata.2024.120088). 1,2-PD. (Catalysis Commun., 2024, 187,
monomers from degrading solutions Feb. 106864).
was developed. (ACS Sustainable Chem. Efficient and switchable
Eng., 2025; DOI: 10.1021/acssusche- production of bio-diol/ Poly(glycolic acid, GA) with
meng.4C09354). triol chemicals from enhanced mechanical and
5-hydroxymethylfurfural foaming properties obtained
Pyrolysis-derived activated (HMF) by biobased cashew phenol
carbon from Colombian [This column has covered many papers glycerol ether
cashew nutshell (CNS) on valorising furfural and HMF into [This column has covered papers on
for valorisation in phenol value-added products. This subject continues polyGA with respect to its multifarious
adsorption to attract a lot of attention and shows uses, including in biomedical applica-
the versability of catalysts for different tions, also with copolymers with lactic
L.J. Cruz-Reina et al have subjected conversions to value-added products.] acid.]
CNS to pyrolysis to make biochar. This
was chemically activated with KOH to A. Rezayan et al have worked on hydro- P. Du et al have reported non-lin-
remove phenol from an aqueous solution genation and hydrogenolysis of HMF ear poly(GA) by using the bio-based

Chemical Weekly June 24, 2025 159

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