Page 157 - CW E-Magazine (24-6-2025)

Special Report

12.85-gm per kg), theanine (152.2-gm
per kg) and caffeine (48.44 gm per
kg). Sequential separation of the above
substances was done with two biphasic
systems. The first biphasic system com-
posed DES and ethyl acetate. Further
follow up for separation is given in the
paper. (Sepn. Purfn. Technol., 2025, 360,
Part-1, 8 July, 130918; DOI:10.1016/
jseppur.2024.130918).

Recovery of essential oils,
polyphenols, fermentable
sugars and pectin from orange
residues

D.D. Duran-Aranguren et al have studied
the recovery techniques. Steam distil-
lation was adopted for high yields of
essential oils (0.7 g per 100 g). Solid-liquid
extraction with ethanol (61.6% w/v, Further, glucose was obtained at 12.49 Preparation and
45.8°C to give naringin (0.19-gm/100 gm per 100-gm DM and xylose at 10.19 characterisation of
gm DM), hesperidin (1.2-gm per 100gm gm/100-gm DM from sulfonic acid nanocellulose-reinforced
DM) and glucose (3.9-gm per 100 gm hydrolysis. (Sepn. Purfn. Technol.,2025, water-soluble cellulose acetate
DM). Pectin was obtained at 25.2-gm per 359, Part-3, 22 June, 130590; DOI: film (CAF)
100-gm DM from citric acid hydrolysis. 10.1016/j.seppur.2024.13059C).
H. Chen et al have reported a water-soluble
CAF with a degree of acetyl substitution of
0.9, which was dissolved in water & mixed
with aqueous dispersion of reinforcing
cellulose nanofibers (CNF) at various
mass ratios. Aqueous dispersions of
TEMPO-CNFs (TEMPO = 2,2,6,6-tetra-
methylpiperidine-1-oxyl radical) containing
sodium carboxylate & protonated carboxy
groups were separately prepared & used
to produce CA composite films. Highly
transparent CA/TEMPO-CNF films have
favourable properties. Thus CA/CNF
mixtures can be used as water-based coat-
ings & paints with favourable properties.
(Reactive Functional Polymers, 2024, 205,
Dec., 106083; DOI: 10.1016/j.reactsunct-
polym.2024.106083).
Green synthesis of cutting-
edge non-ionic surfactants
derived from Lignin (L)

F. Bucciol et al have mentioned that
by itself L is not suitable, but a product
based on cracking of L – vanillic acid

Chemical Weekly June 24, 2025 157

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