Page 167 - CW E-Magazine (22-7-2025)

Special Report Special Report

tration of molasses and initial pH were feeds of F and formaldehyde (HCHO), of a hydroxy group in the presence of an 4.08 ± 0.22 h g cat -1 , yielding more than
-1
most significant parameters. Ethanol which are low cost and readily available. aldehyde moiety. The highest selectivity 90% DODH products. Alkyl acrylates
concentration of 139 g/L was realised This strategy relies on reversible deri- for MF was 86% at full conversion. can be made. (Green Chem., 2025; DOI:
with a production of 2.9 g per litre per hr. vatisation of the -CHO group of F with BHMF is formed in 80% selectivity at 10.1039/D5GC00445D).
and a yield of 1.22 gm of ethanol per gm DMH. Guaiacol, bio-derived, can be used full conversion when the catalyst is re-
of reducing sugars. These authors recom- as a solvent. 94% selectivity is reported duced at 700°C, resulting in signifi cantly Recyclable high-performance
mend the mixed feed. (Can. J. Chem. at 50°C and stoichiometric amount of lowered acidity and formation of larger thermosetting plastics from
Eng., 2025; DOI: 10.1002/cjce.25640). HCHO. F can be at 40% concentration in Ni particles. (ChemCatChem., 2025; Isosorbide (IS) based on Diels-
guaiacol. Recycling of DMH is discussed. DOI: 10.1002/cctc.202401818). Alder reaction (DAR)
Hydrogenolysis of furfuryl (ChemSusChem., 2025; DOI: 10.1002/
amine (FA) to 5-amino-1- cssc.202500318). A H -free heterogeneous J. Li et al have focused on the design
2
pentanol (AP) route to glycerol (G) based and synthesis of novel biobased thermo-
(MSC) and glycerine (G) by poly- Selective hydrogenolysis Tuning selectivity in direct acrylics via Re-based
condensation and subsequent thermal of furfuryl alcohol (FA) to setting polymers using IS, furfuryl-
S. Zhang et al have reported that AP is cross-linking. This shows great potential 5-hydroxymethylfurfural deoxydehydration (DODH) amine (FA), and two structurally dis-
an important intermediate in pharmaceu- for making SAPs. Water absorption 1,5-Pentanediol (HMF) hydrodeoxygenation [The availability of G as byproduct tinct bismaleimide cross-linker based
ticals and hence they have worked on capacity is reported at 24 gm per gm. F. Cao et al have reported the use of a to 5-methylfurfural (MF) from biodiesel (at 10%) has triggered a on reversible DARS. NMR and FTIR
the title synthesis, which has interesting Further, these SAPs are biodegradable. supported 5 Co/CeO catalyst for the title or 2,5- bis(hydroxymethyl) lot of interest in converting G to useful were used for characterisation. Pre-
features. This process is simple and has (Green Chem., 2025; DOI: 10.1030/ conversion. Complete conversion of FA furan (BHMF) over Ni/TiO products like, acetol, 1,3- and 1,2-pro- polymer was prepared. The mechanical
2
high atom utilisation. Pt/ZrO catalysts D4GC06323F). is reported at 170°C and 4 MPa H in 1 catalysts 2 panediol, dihydroxyacetone, etc. and and thermal properties of isosorbide/
2
were used with different Pt loading and hr., with a 54% selectivity to PD. The this column has covered some papers furfuryl amine DA cross-linked poly-
2
effects of calcination temperatures on Furfural (F) to 1,5-pentanediol reaction was fi rst order in H pressure M. Przydacz et al have referred to MF on these conversions.] mer (ISFA-DA) could be effectively
catalyst activity, selectivity, and surface of FA and activation energy was 76 KJ as a versatile synthetic intermediate and and rapidly tuned by adjusting the
2
properties such as Pt nanoparticle size, (PD) per mol. perfuming agent and it is diffi cult to get Here bio-based glyceric acid (GA) to structure and content of the maleimide
acidity and alkalinity, were investigated. [This column has covered many papers it from HMF, as the selective hydrodeoxy- acrylic acid and its esters is studied cross-linkers. Tensile strength from 8.2
The mechanism is explained. (Ind. Eng. on the conversion of F and other related genation of the C-OH group in HMF is using Re/C based catalyst. A combined to 79.8 MPa and elongation at break
products to value-added products and, in Hydroxy methyl furfural
Chem. Res., 2025; DOI: 10.1021/acs. particular, converting tetrahydrofurfuryl (HMF) to 5-methylfurfural far less favourable kinetically and thermo- yield of acrylic acid and methyl acrylate from 6.5% to 100° and glass transition
iecr.4C094908). dynamically. Ni/TiO catalyst can be up to 65% is reported at 150°C, in inert temperature (GTT) of 26 to 93 could be
alcohol to 1,2/1,4/1,5 PDs.] (MF) 2 N atmosphere. Using H at 5 bar and realised. This is a promising strategy.
2
2
Biodegradable, fully bio- Y. Liang et al have used rare-earth metal W. Huang et al have reported the title tuned to promote the selective removal increased temp. of 180°C boosts the (Ind. Eng. Chem. Res., 2025; DOI:
based, thermally cross-linked modifi ed Co-based catalysts for highly hydrogenolysis using non-precious Cu/ DODH rate constant from 0.21 ± 0.03 to 10.1021/acs.iecr.4C04639).
superabsorbent polymers selective title conversion. Y-modifi ed WO catalyst in a continuous fl ow reac-
3
from citric acid (CA) and Co-based catalyst with Co/Y molar tor. Cu/WO gave a selectivity of 72.7%.
3
glycerol (G) ratio of 3.5/0.5 gave highest selectivity X-ray photoelectron spectroscopy (XPS)
of PD of 53.7% at 150°C and 4 MPa H revealed that the oxidation state stability
2
J. Chen et al have worked on the title in isopropanol. DFT calculations were of Cu varied due to support. DFT cal-
subject using renewable non-toxic raw done. (Ind. Eng. Chem. Res., 2025; DOI: culations were done. Finally Cu/WO
3
materials: CA, monosodium citrate 10.1021/acs.iecr.4C04382). catalyst gave 94% yield of MF at 300°C
and a solvent mixture of 1,4-dioxane and
water (4:1). (New Jl. Chem., 2025; DOI:
10.1039/D5NJ00160A).

N-N-Dimethylhydrazone
(DMH) as a reversible
derivatisation agent
to promote the
hydroxymethylation of
furfural (F) with HCHO
F. Jerome et al have reported the synthesis TEM images of (A,B) Ni(pre)/TiO2(ALG) reduced at 500 °C,
of hydroxymethyl F from concentrated (C–E) Ni(pre)/TiO2(ALG) reduced at 700 °C, and
(F) Ni/TiO2(PC500)

166 Chemical Weekly July 22, 2025 Chemical Weekly July 22, 2025 167

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