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Special Report Special Report

tandem catalysts integrating a NiO- Synergistic eff ect Production of caprolactone 2.2, 5.4, and 0.7%, respectively, at as oxidant, at 70 C. Epoxide yield was
o
modifi ed Cu-based component with a between Pt and CrO on (CL) via N-doping CH conversion of 8.2%. (Catalysis in the range of 90-100%, under batch
4
x
Mg-Al-Zr mixed metal oxide. Ethanol reversible hydrogenation Sci. Technol., 2025; DOI: 10.1039/ operation, within 4 hours. In a fi xed-
conversion of 68% is reported with and dehydrogenation of Z. Cai et al have worked on batch to D4CY01469C). bed reactor, catalyst Si/MoNb led to
excellent selectivity of higher alcohols dibenzyltoluene (DBT) semi-batch and continuous fl ow opera- 44% epoxide yield at 70°C. At 90°C Si/
at 75% and high space time yields. [This column has covered some papers tions. Here nanocarbons have been Phenylcarbazole (PC)- Mo/Nb exhibited multi-functionality
(Green Chem., 2025; DOI: 10.1039/ on H carriers as a strategy to boost identifi ed as eff ective catalysts to pro- stabilised Pd catalysts leading to 51% cyclooctanone yield.
D4GC05768F). H economy and one of the candidate mote the Baeyer-Villiger (BV) oxida- for effi cient acetylene (ChemCatChem., 2025; DOI: 10.1002/
2
2
SEM images of prepared catalysts: Greening two chemicals molecules is DBT, which has also been tion of cyclohexanone to CL. A kinetic hydrochlorination to vinyl cctc.202500003).
model is reported. Here BV oxidation
(a) Fe─Mo; (b) Fe─Mo─Li; covered in the past.] chloride (VC) Catalytic alkylation of
(c) Fe─Mo─Na; and (d) Fe─Mo─K with one bio-alcohol: and aldehyde self-oxidation is referred.
Environmental and economic N. Lei et al have developed a new (Ind. Eng. Chem. Res., 2025; DOI: S. Ali et al have employed PC based 2,6-xylenol (X) with methanol
Li/Mo molar ratio of 5% was found to potential of dehydrogenation dopant CrO (at 1% by wt) to be added 10.1021/acs.iecr.5c00163). Pd catalysts for the title reaction. to alkylphenols over
x
be useful. (ChemCatChem, 2025; DOI: to H and acids to Pt/Al O catalyst which has 99.9% C H conversion is reported H-composite zeolite supported
3
2
2
2
10.1002/cctc.202401951). 2 helped in the dehydrogenation of Glycerol (G) to acrolein (A) with 99% VC selectivity. There was Pd nanoparticles
I-M. Lahrsen et al have studied the hydrogenated DBT and increased it no catalyst deactivation for 380 hours.
Process intensifi cation economic potential of bio-based dramatically to 87% compared to only R. Condotta et al have reported a DFT calculations were done. (Cata- Y-H. Kang et al have reported the high
of heterogeneous multi-product systems for coproducing 65.6% with Pt/Al O . The catalyst was systematic investigation of metal- lysis Sci. Technol., 2025. DOI:10.1039/ X conversion and alkylphenols yields
3
2
dehydrochlorination of H and high-value acids from bio- stable. (Ind. Eng. Chem. Res., 2025; oxides and zeolites for the title reaction. D4CY01414F). are obtained over Pd/HCZ. DFT calcu-
2
β-chlorohydrin using phase alcohols. Consideration is given to H + DOI: 10.1021/acs.iecr.4c03878). H-ZSM and US-HY, commercial lations were done. Conversion of 100%
2
transfer catalysts (PTCs) four co-product candidates: formic oxides (Al O and niobium) and modifi ed Oxygen-mediated H spillover and 97.5% yields of alkylphenols are
2
3
acid, acetic acid, lactic acid and succinic Oxidation of 1,2-propanediol aluminas (MgO/F-Al O ;F-Al O ) were promotes stable synthesis of reported with Pd/HCZ catalyst. (Chem.
2
3
2
2
3
acid. Co-producing lactic acid shows used in gas-phase with G-water mixture
G.D.Z. Lee et al have mentioned that substantial trade-off s. (Green Chem., (PG) to methyl lactate vinyl chloride (VC) on Ru Eng. Sci., 2025, 308, 1 April, 121420;
terminal epoxides are important mono- 2025; DOI: 10.1039/D4GC05443A). (ML) over hydroxyapatite- at 320 to 450°C. The US-HY was better single-atom catalysts DOI: 10.1016/j.ces.2025.121420).
mers and modifi ers that are widely supported Au-Cu catalysts catalyst with yields to 80%. (Ind. Eng.
used in the polymer and coating in- Highly effi cient ethanol with varying Ca/P ratios Chem. Res., 2025; DOI: 10.1021/acs. Y. Fan et al have reported the title Continuous oxidation of
dustries. These authors have worked upgrading to higher alcohols iecr.4c04126). catalyst for the reaction of HCl and toluene derivatives to aromatic
on 3-chloro-2-hydroxypropyl neodeca- J. Tian et al have reported the title oxi- CH CH to make VC. O doped Ru aldehydes in an umbrella-
2
noate (CHPDA), which has poor solu- over surface acidity-enhanced dative esterifi cation in an alkali-free Formation of HCHO, CO and single-atom restricts over-chlorination. shaped microchannel reactor
bility in water. Thus, PTCs can be very Cu-based catalysts methanol system. The conversion of H by CH oxidation with O The reported catalyst gives the remark-
2
4
2
useful and tetrabutylammonium chloride L. Yuan et al have reported new and PG was 71% and selectivity of ML was over Cu catalysts stabilised in able yield of VC of over 99.38% and S. Shi et al have used a Co/Mn/Br cata-
was used for heterogeneous dehydro- cost-eff ective metal phosphate – sup- 70.6% over the optimised Au-Cu/HAP-2 silicoaluminophosphates stability for over 900 hours. (Angew. lytic system using acetic acid/water
chlorination. This reaction worked ported Cu catalysts. There are interac- catalyst. (Catalysis Sci. Technol., 2025; [The selective oxidative conversion of Chem. Intl. Ed., 2025; DOI: 10.1002/ as the solvent and para-nitrotoluene
rapidly with the above PTC to make the tions between Cu and support. Com- DOI: 10.1039/D4CY01559B). CH continues to attract attention and anie.202501040). (PNT) was used as a model substrate.
4
corresponding epoxide. (Green Chem., pared to Cu/CePO and Cu/AlPO , Cu/ thus column has covered some papers.] At 11.8% conversion, selectivity of
2025; DOI: 10.1039/D4GC05781C). 4 4 Modulating adsorption Batch and continuous fl ow 67% of the corresponding benzalde-
LaPO catalyst have higher Cu surface behaviour by single-site H. Shimakawa et al have reported the catalytic epoxidation over hyde is reported under aerobic con-
4
Ethanol-based products Pt on RuO for effi cient catalytic performance of Cu catalysts silica-embedded metal oxide ditions. (Reaction Chem. Eng., 2025;
2
electrosynthesis of glycolic supported on SAPO catalysts for the nanoparticles DOI: 10.1039/D4RE00484A).
Conversion of ethanol to acid (GA) from plastic wastes title reaction in the temperature range
higher alcohols between 520°C and 650°C and HCHO, D.M. Gomes et al have worked on Aqueous dehydrogenation of
[This subject continues to attract atten- Y. Chen et al have worked on the H and CO were formed. At 650°C heterogeneous catalysts for the title methyl formate (MF) to H 2
2
tion, and this column has covered some area and a higher Cu content. This leads title strategy for recycling of PET the yields of H , CO, HCHO reached reactions. Silica embedded nanoparti- [Transportation of hydrogen through
+
2
papers. It may be noted that over 50 to stronger dehydrogenation of ethanol into valuable GA. Their strategy cles of molybdenum oxide (Si/Mo(x), carriers is gaining importance and this
years ago, in India, ethanol was con- and high selectivity of higher alcohols avoided overoxidation to oxalic x=Mo loading) and silica embedded column has covered some papers.]
verted to n-butanol and 2-ethylhexanol at 81% at 74.5% ethanol conversion acid. High GA Faradaic effi ciency nanoparticles of binary transition metal
via acetaldehyde by Union Carbide.] is reported. An explanation is given of 95% is reported with selecti- oxides (Si/MoM, M = Ta, Nb or W) D. Milstein et al have worked on Liquid
for the functioning of the proposed Cu vity of about 97%. (Angew. Chem. were synthesised. These catalysts pro- Organic Hydrogen Carriers (LOHCs)
Boosting of higher alcohols from catalyst. (Ind. Eng. Chem. Res., 2025; Intl. Ed., 2025; DOI: 10.1002/anie. moted epoxidation of cis-cyclooctene and have come out with homo-
ethanol is reported by L. Yuan et al using DOI: 10.1021/acs.iecr.4c04005). 202422183). with tert-butylhydroperoxide (TBHPO) geneous molecular catalyst immobilised
154 Chemical Weekly May 27, 2025 Chemical Weekly May 27, 2025 155
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