Page 169 - CW E-Magazine (9-4-2024)

Special Report Special Report

Aldol condensation reactions portant molecules such as pemoline, alkanes in the range of C -C under cate zeolite have signifi cant effect on tested in a packed bed reactor. Reco- Catalytic behaviour of K-doped
1
45
with hydrotalcite (HTC)-like cyclandelate, and methaqualone. (ACS mild conditions of 225°C, 20 bar H . the performances of these catalysts. very process is reported. (Org. Proc. Fe/MgO catalysts for ammonia
2
materials Sustainable Chem. Eng., 2023; DOI: The catalyst could be reused.(Angew. These authors have simultaneously Res. Dev., 2023; DOI: 10.1021/acs. synthesis under mild reaction
10.1021/acssuschemeng.3c04273). Chem. Int. Ed.; DOI: 10.1002/anie. regulated these features for high PO oprd.3c00144). conditions
V. Korolova et al have reported simple 202317526). selectivity and H effi ciency. This work [Many attempts are being made to have
2
green synthesis of surface HTC-like Synthesis of para-aminophenol provides a basis for modifying the Au- Sustainable sulfonic acid catalysts which work under milder con-
phase on MgO and the performance (PAP) by transfer hydrogena- Assessing the technical routes Ti bifunctional catalysts. (Ind. Eng. functionalised tubular shape ditions compared to that-in the Haber-
of supported HTCs was comparable to tion of nitrobenzene (NB) with for chemical cycling of waste Chem. Res., 2023; DOI: 10.1021/acs. mesoporous silica as a hetero- Bosch process and this column has
bulk HTCs. The procedure for suppor- HCOOH as a H source plastics to light olefi ns iecr.3c03595). geneous catalyst for selective covered some papers.]
ted HTCs is reported (Mg/Al=20). The 2 unsymmetrical Friedel-Crafts
Y. Zhang et al have used Pt/C and So / J. Liang et al have considered four Dibenzyltoluene (DBT) hydro- (FC) alkylation in one pot The aim is to have a catalyst which
2-
4
ZrO catalyst (mechanically mixed) for potential technical routes for plastics genation works below 400°C and below 10 MPa.
2
the title reaction in water; 1wt% worked to light olefi ns via syngas through S. Singh et al have come out with a K. Era et al have reported Fe/K(3)/MgO,
well. Under optimum conditions the the Fischer-Tropsch process (PFTO), There is a lot of activity for H carriers benign process for carrying out FC made via an impregnation method,
2
Oxo-Zeo process (PZTO), via metha- and DBT is a potential candidate. J. Li reactions. Mesoporous silica catalyst was which is highly active even at 350°C
nol (PMTO), and via pyrolysis oil et al have studies the intrinsic kinetics functionalised with sulfonic acid via and 1.0 MPa. The activity was 17.5
of hydrogenation of DBT over a sup- mmol per hour per gm catalyst, which
ported Ni catalyst (Ni/Al O ). This is higher than the conventional fused
3
2
hydrogenation has two steps: DBT iron catalyst of 8.6. Raising pressure
to 12H-DBT; and then 12H-DBT to to 3 MPa raised the rate to 29.6, which
NB conversion and PAP selectivity 18H-DBT. H pressure and tempera-
were 80% and 47.6% respectively. 2 is higher than the two more expensive
test reaction was the aldol condensation (New Jl. Chem., 2024; DOI: 10.1039/ ture have favourable effect and mass Ru-based catalysts. (Chem Sus Chem.,
transfer resistance is absent. (Ind. Eng.
of furfural with acetone and the catalyst D3NJ04360F). Chem. Res., 2023; DOI: 10.1021/acs. 2023; DOI: 10.1002/cssc.202300942).
was stable. (Applied Catalysis A: Gene-
ral, 2024, 669, 5 Jan, 119506; DOI: BF /HY as a microporous solid iecr.3c03613). Oxidative conversion of poly-
th
3
10.1016/j.apcata.2023.119506). acid catalyst for regioselective Cu-catalysed continuous-fl ow thio-functionalised mesoporous silica. ethylene (PE) to dicarboxylic
ring-opening of epoxides Confi rmation was done by C CP MAS acids
13
CuO NPs catalysed selective transfer hydrogenation of nitro- NMR spectroscopy. Diverse poly- Special Repor
Special Reportt
valorisation of vicinal glycols Y. X. Yao et al have ensured uniform arenes to anilines: A scalable alkanes were made, which included T. Smak et al have reported title re-
to alpha-hydroxy carboxylic dispersion of BF on HY and different and gas through hydrocracking and and reliable protocol various bioactive molecules like arundine, action to valorise PE waste. Both
3
acids via dehydrogenation alkyl- and aryl-substituted aldehydes steam cracking process (PPTO). It tatarinoid-C, etc. (even menthol and non-catalytic and catalytic methods
strategy could be obtained with exceptional seems that PMTO process is most K. Martina et al have used Cu nanopar- eugenol). Catalyst was successfully are covered. Apart from carboxylic
ϒ
ϒ
yields and selectivity. The catalyst attractive and the production cost is ticles on celite and this is a benign recovered and recycled for 8 cycles. acids, methyl ketones, -lactones, -ke-
S. Gupta et al have used copper oxide can be easily separated and recycled. lowest in this process. MTO is a com- process when transfer hydrogenation (JACS Au, 2023; DOI: 10.1021/jac- tones and esters are formed. (Chem Sus
nanoparticles to carry out the title re- The catalyst is safe, stable and exhi- mercially proven process and some is done; no noble metal catalyst is sau.3c00563). Chem.; DOI: 10.1002/cssc.202301198).
action of considerable importance in bited excellent reactivity. (Reaction plants run in China. (ACS Sustainable used. Long-term stability is reported
industry. This is a simple catalytic sys- Chem. Eng., 2023; DOI: 10.1039/ Chem. Eng.; DOI: 10.1002/acssusche- and nitrobenzene conversion was over Carbonylation of dimethoxy- Catalytic process: Enzy-
tem with broad substrate scope, high D3RE00387F). meng.2023.3c06252). 99%. Representative nitroarenes were methane (DMM) matic + Electrolytic
selectivity and good functional group
tolerance, and recyclability. This was Consumer grade polyethylene Phosphate-modifi ed effects on K.A. Sheikh et al have carried out the A dendritic porous Cu foam-
applied to even some biologically im- recycling via hydrogenolysis uncalcined TS-1-immobilised title reaction to give methyl methoxy- carbonic anhydrase biohybrid
on ultrafi ne supported Ru Au catalysts for propylene acetate (MMA), which has multifarious for CO electroreduction
nanoparticles epoxidation with H & O uses. Different zeolites and cationic ion 2
2
2
[Propylene conversion to epoxide with exchange resins were used as catalysts M. Shu et al have bound CA to a den-
S.D. Jaydev et al have worked on valori- aqueous H O is now commercial on a in liquid phase. The highest conver- dritic porous Cu foam (3D-Cu) via elec-
2
2
sation of high molecular weight substantial scale.] sion of DMM was realised with cata- trostatic interaction to form a biohybrid
HDPE, which usually poses problems. lyst Z-30 (ZSM-5; MFI type zeolite) (CA/3D-Cu), which exhibits high selec-
Ru nanoparticles of 1-nm were sup- J. Xu et al have reported that the Au and Amberlyst 46. Some by-products tivity and Faraday effi ciency in the
ported on anatase TiO and this catalyst nanoparticle sizes, as well as surface are formed. (Catalysis Sci. & Technol., electroreduction of CO to HCOOH,
2
2
allowed up to 80% conversion to light properties and Ti species of titanosili- 2024; DOI: 10.1039/D3CY01286G). with a selectivity of 98.7% and Faraday
168 Chemical Weekly April 9, 2024 Chemical Weekly April 9, 2024 169

Contents Index to Advertisers Index to Products Advertised