Page 171 - CW E-Magazine (12-12-2023)

Special Report

Methyl ester (ME) sulphonate and 72.5% yield of 1,1,2-triethoxyethane
synthesis from used cooking oil could be realised. (Green Chem, 2023;
by sulphonation DOI: 10.1039/D3GC00587A).

A.S. Yusuff et al have used NaHSO -based Sustainable syntheses of para-
3
sulphonation of ME in molar ratio of 1.1- cetamol (PA) and ibuprofen (IB)
1.5:1 mole/mole. This ester synthesis, from bio-renewable beta-pinene
for the first time, was modelled using the (BP)
adaptive neuro-fuzzy inference system,
artificial neural network and response J.D. Tibbetts et al have reported the title reduce the energy loss from windows.
surface methodology. The temperature scalable process. Both processes use (ACS Sustainable Chem. Eng., 2023;
was 96.84°C and finally 0.92:1 mol/mol Pd(0) catalysed reactions to aromatise DOI: 10.1021/acssuschemeng.3C01600).
NaHSO /ME was adopted. (ACS Omega, the cyclohexenyl rings to make benzenoid Lignin (L) recovery using
3
2023; DOI: 10.1021/acsomega.2C08117). ring systems. The potential of using alkaline pre-treatment of walnut
bio-derived 4-hydroxyacetophenone as a shells (WS)
Conversion of biomass-derived drop-in feedstock to produce sustainable
sugars to 1,1,2-trialkyloxyethane products is also covered. (ChemSusChem; I. Deniz has studied the effects of
(TriAE) via a (2+4) retro-aldol DOI: 10.1002/cssc.202300670). alkaline pre-treatment of WS using
reaction over alkaline and alka- NaOH, Ca(OH) , or KOH. The use of
2
line earth metal salts of phospho- Flexible and transparent NaOH-glycerol gave highest recovery of
tungstic acid (HPW) bagasse (B) aerogels for thermal L, with NaOH/solid ratio of 20:1 (ml per gm).
regulation glazing CaCl loading enhances L flocculation,
2
T. Liu et al have referred to the big which improved the recovery of L. The
challenge in efficiently and selectively P. Zhao et al have reported the control- efficiency of enzymatic hydrolysis was
breaking the C-C bond in hexose to lable extraction of cellulose (C) from determined when xylanase and cellulase
synthesise TriAE. A series of metal salts B, at low-cost (less than US$3 per sq. were added to the pre-treated residue.
of HPW were studied and the effects of foot), flexible (more than 15% elastic This study demonstrates the utility of
the atomic ratio of Cs/H in Cs H P- deformation under 0.02 MPa) B aerogel alkaline pre-treatment. (Chem. Eng.
3-x
x
N O (x=1-3), temperature, etc. were film, with high visible-transparency Technol.; DOI: 10.1002/ceat.202200586).
40
12
also studied. Different biomass-derived (over 80% transmittance of visible light)
and super-insulation (0.0158 Wm k ). Integrated sugar industry com-
-1
-1
sugars, namely, glucose, fructose, man- This was achieved by constructing a plex in India
nose, etc., and different alcohols, namely,
CH OH, C H OH, etc. were studied. uniform three-dimensional network M. Munagala and Y. Shastri have cove-
2
3
5
structure using elastic polysiloxane and
Cs HPW gave the best activity, con- a mixture of cellulose nanofibers and red comparison of different potential
configurations. Sustainability metrics
2
verting glucose to TriAE via (2+4) cellulose nanocrystals in equal proportion. were used. The product mixture consists
retro-aldol condensation and as high as This product has potential application of sugar, ethanol, and of six possible
88.44% yield of 1,1,2-trimethoxyethane in highly glazed modern buildings to bagasse valorisation products, namely,
electricity, bio-CNG, 2G ethanol, lactic
acid, succinic acid, and xylitol. Material
and energy balance for the integrated
complex are covered, along with the cra-
dle-to-gate LCA and a social assessment.
Their study shows that for 325 tph sugar
mill, xylitol production is economically
most favourable. Bio-CNG is desirable
from a climate change impact reduction
standpoint. There was inclination toward
bio-CNG production as per social assess-
ment. (Ind. Eng. Chem. Res., 2023; DOI:
10.1021/acs.iecr.2C04593).

Chemical Weekly December 12, 2023 171
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