Page 178 - CW E-Magazine (8-4-2025)

Special Report Special Report

Effi cient photocatalytic CH to and the highest yield of AA was 77%
EtOH conversion 4 under optimum conditions with 100%
[This column has covered many papers conversion of PD. (Applied Catalysis
on valorisation of CH and this subject A: General, 2025, 691, 5 Feb., 120064;
4
continues to attract attention.] DOI:10.1016/j.apcata.2024.120064).
Q. Zhang et al have come out with a Synthesis of glycolic acid
new strategy to convert CH to EtOH, (GA) by selective oxidation of
4
which at ambient conditions for the ethylene glycol (EG)
activation of inert C-H bonds requires
highly reactive oxygen species like hy-
droxyl radicals (.OH). BiVO photocata- Y. Xu et al have reported extensive
4
catalyst. This catalyst has ultra-high molecules, etc. are assisted by this lyst has been developed with surface applications of GA in the production
reactivity. (Angew. Chem. Intl. Ed., methodology. (Molecular Catalysis, functionalisation of Au nanoparticles. of biodegradable polymers, pharma-
2024; DOI: 10.1002/anie.202418645). 2024, 567, October, 114419; DOI: A peak EtOH yield of 680 µmol per gm ceuticals and fi ne chemicals. These
10.1016/j.mcat.2024.114419). per hr and high selectivity of 86% is authors have used Pt catalyst supported
Direct electrochemical A highly effi cient Pd/ reported. (Angew. Chem. Intl. Ed., 2024; on the Sn-Beta zeolite for effi cient and group that acts much like a lock, makes this catalyst the selectivity for total
N oxidation to nitrate on CuI-catalysed oxidative DOI: 10.1002/anie.202419282). it possible to degrade and recycle with C -C alcohols reached 97.8% with a
10
4
yield of 53.9% at 325°C and 0.1 MPa,
Ni catalyst in the presence of a reduc-
2
supportive Pt/CeO
2 alkoxycarbonylation of Sustainable route of ethylene ing agent. (Chem. Sci., 2024, 15, 17556; which is higher than the previous re-
α-olefi ns to unsaturated ester carbonate (EC) production via DOI:10.1039/D4SC04147). ported catalysts. (ACS Sustainable
The title conversion is of considerable Chem. Eng., 2024; DOI: 10.1021/acs-
industrial importance. Y. Zhang et al M. Maffei et al have reported the new CO carboxylation Enhancing reactive suschemeng.4c04185).
2
have reported an effi cient Pt/CeO for title protocol where differently substi- W.L. Ng et al have discussed process microemulsion processes:
2
the title conversion. It appears that tuted styrenes were selectively conver- development, process integration and Dynamic optimisation and Catalytic dehydration of
highly dispersed Pt and oxygen vacan- ted to cinnamate derivatives, via C-H economic analysis of the title process glycerol to acrolein
cies from CeO nanocubes (NCs) bond functionalisation. Even hetero- using ethylene glycol (EG). The use of cyclic semibatch operation
2
exhibit strong interactions which pro- geneous Pd was considered. Good yield a CeO nanorod achieved the highest highly selective title reaction. This for the reductive amination of W. Leo et al have used ZSM-5 zeolites
2
mote the N adsorption on the catalyst EC production of 0.072 mmol EC per g was done at near room temperature of undecanal (U) in a mini plant as catalysts with effect of pore struc-
2
surface. (Chem. Commun., 2024/CC/ of EG. Process integration allowed 30°C. The catalyst was fully characte- ture and Al distribution. Mesoporous
D4CC05397D). 60% heat recovery. The use of 2-cyano- rised. 90% conversion of EG and 81% K. Duch et al have come out with a structure is favourable along with the
pyridine is also referred. The minimum selectivity of GA is reported. (Reac- new strategy of adopting microemul- increase of Bronsted acid sites. DFT
Flavin-catalysed, TBHP- selling price of EC must exceed AUD tion Chem. Eng., 2024; DOI: 10.1039/ sion system (MES) for the title reaction calculations were done. High yield
promoted oxidation of (het) and chemoselectivity are reported. CO 10.20 per kg. (ACS Sustainable Chem. D4RE00243A). for maximizing. A cyclic semi-batch is reported. (ACS Sustainable Chem.
aryl alkane to ketone pressure was low at 2 atm and an ex- Eng., 2024; DOI: 10.1021/acssusche- operation was adopted. The yield was Eng., 2024; DOI: 1021/acssuschemeng.
cess of air was used (35 atm) to avoid meng.4c06519). Catalytic breakdown of high- 43.8% and selectivity 64.3% and con- 4c07302).
H. Gan et al have developed the title explosion risks. Cinnamate esters were performance polymers version was 68%. 91% of the catalyst
strategy and the products were ob- obtained in good to excellent yields in a Vapor-phase dehydration of entering the settler is recycled to the Induction heating (IH) for
tained in moderate – to excellent yields very simple one-pot procedure. (J. Mol. 1,2-propanediol (PD) to allyl Many attempts are being made to have reactor and constant operation was the electrifi cation of catalytic
with broad functional group tolerance. Catalysis A: Chemical, 2017, Jan, 426, alcohol (AA) high-performance polymers which can observed without additional catalyst. processes
Many biologically active pharma Part B, 435-443). be degraded. S. Ogawa et al have deve- (Ind. Eng. Chem. Res., 2024; DOI: 10.
M. Morooka et al have reported the use 1024/acs.iecr.4c02607).
of silica-supported Cs phosphate as a loped a thermoplastic consisting prima- L. Truong-Phuoc et al have referred
catalyst for the title reaction. Cs/P ratio rily of poly(aryl ether), which maintains High-selective upgrading to the availability of renewable power
of 1.4 was found to be the most effi cient strength during regular use but selec- through solar and wind sources and
tively breaks down when exposed to a ethanol (E) to C -C alcohols thus there is a trend to adopt electri-
4
10
Ni catalyst. Poly(aryl ether) is versatile, over hydroxyapatite (HAP) cal energy in chemical processes. The
can withstand heat and chemical expo- catalyst with superior basicity use of IH, both for catalyst production
sure, and used in packaging, automotive and operation, is covered. IH offers a
and electronics. It is diffi cult to degrade J. Wang et al have worked on mani- cleaner, more effi cient, and precise way
but incorporating a directing group into pulating basic and acidic properties of to heat catalysts by directly generating
the structure of the polymer, which is catalysts to realize the title conversion. heat within catalyst itself. It may well
a heteroatom-containing functional The synthesis of HAP is reported. With infl uence reaction performance. Re-

178 Chemical Weekly April 8, 2025 Chemical Weekly April 8, 2025 179

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