Page 176 - CW E-Magazine (8-10-2024)

Special Report

(Fe-Hydrogen). The catalytic processes plastic enzymes for the title reaction,
with X lead to the mixture of LA, FA and through CO fi xation. In vitro SEB yields
2
pyruvic acid. Mechanism is explained. two moles of L-malate from one mole of
(J. Chem. Technol. Biotechnol., 2024: G and two moles of CO . Encouraging
2
DOI: 1011002/jctb.7721). results are reported and a high concen-
tration of 45.70 mM of G could be used.
Glycerol (G)-based pressure (Green. Chem., 2024: DOI: 10.1039/
sensitive adhesives (PSAs) D4GC01799D).
Al /Zr cotanning agents was useful.
4+
3+
F.Y. Lin et al have reported synthesis and Simulation and optimisation of This paper provides new insights into
applications of the title adhesives. Acry- crude glycerol (G) refi ning pro- developing new tanning agents. (ACS
lated G and solketal acrylate were used cess as a co-product of biodiesel Sus. Chem. Eng., 2024; DOI: 10.1021/
to synthesise two methacrylate-based acssuschemeng.4C01036).
block copolymers – poly(methyl meth- H. Jiang et al have worked on the title
acrylate-block-acrylated glycerol) subject due to availability as a by-pro- Extraction of collagen (C ) from
(MMAAG) and poly(isobornyl acry- duct from manufacturing biodiesel. bovine tannery solid waste pre-
late-block-solketal acrylate-block-iso- They have studied phase equilibrium serving original conformation
bornyl acrylate) (IBASA). These elasto- of G-water-K SO . The purifi ed G can via radical initiation and hydro-
2
4
mers have intrinsic tackiness and be used to make high-value-added gen bond reformation
formulated with plasticisers to realise chemicals. K oleate soap was acidifi ed
the desired PSA properties. The visco- with H SO . V-L equilibrium data for F-Luo et al have referred to tannery
4
2
elastic and morphological properties G-water containing K SO was obtained solid waste (TSW) containing 70-90%
4
2
were studied. A benzoate ester-plasti- under reduced pressure. Optimisation C by wt. There are challenges in rapid
cised IBASA block copolymer with a was done and the case of 1,00,000 extraction of C to preserve its original
molecular weight of 100 KDa and 20 tpa of G is considered and different and unique triple-helical confi rmation.
wt% IBA gives peel performance com- distillation strategies are discussed These authors have come out with an
parable to 3M Scotch Magic Tape. (ACS and G and methanol yields of 98.8% ionic liquid synergistic dissolution and
Sus. Chem. Eng., 2024: DOI: 10.1021/ and 99.79%, respectively are reported. regeneration method based on a TBAH/
acssuschemeng.4C03499). Their strategy reduces energy consump- DMSO/H O ternary (TDH) solvent for
2
tion by 40.65%. (Sepn. Purfn. Tech- rapid recovery under mild conditions.
Green method of synthesising nol., 2025, 353, PaAC, 19 Jan, 2025, TSW solubility is 10.25% and C reco-
L-malate from D-glucose (G) 128567; DOI:10.1016/j.seppur.2024. very yield of 51% is reported. Original
via CO fi xation using an ATP- 128567). conformation is reported. Excellent re-
producibility is reported. (Green Chem.,
2
free in vitro synthetic enzymatic Lignin (L) demethylated by 2024: DOI: 10.1039/D4GC02634A).
biosystem (SEB) protic ionic liquids (PILs) a
novel sustainable chrome-free Catalytic processes for the
L. Fan et al have reported development tanning agent for eco-leather selective hydrogenation of fats
of an ATP-free and NAD-balanced in production and oils
vitro synthetic enzymatic biosystem which
consist of only five cascade thermo- Q. Luo et al have reported the title This is an important subject in the con-
eco-friendly leather tanning agent, which text of food industry where e.g. Linolenic
utilises L-based polyphenols (LP) which moiety is hydrogenated to linoleic and
are also suitable in place of vegetable then oleic and fi nally stearic; cis/trans
tanning agents. LP was prepared via a isomers are also important. Even in the
halogen-free demethylation protocol case of biodiesel selective hydrogenation
in low-cost PILs. Partial disruption of is important and different fats and oils
β-O-4’ linkages in raw L and of the C-O need to be considered. M. Spiekermann
bonds on methoxy groups leads to higher and T. Seidensticker have discussed this
phenolic OH content with more cate- subject. (Catalysis Sci. Technol. 2024:
chol structure in LP. Combo of LP with DOI: 10.1039/D4CY00488D).

176 Chemical Weekly October 8, 2024

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