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Special Report Special Report

and PPG 400 gm/mole, which allows Efficient hydrogenation of Bamboo-alginate composite as a continuously fed in a semi-batch reactor. Ru-catalysed direct asymmetric Research advancement in mol-
the one-step extraction and separation glucose (G) to polyols over sustainable structural material Optimum conditions are reported and reductive amination of bio- ten salt-mediated thermochemi-
of two pigment classes – betalains and hydrotalcite-derived Pt/Ni alloy [India has extensive bamboo cultivation, model predictions matched experimental based levulinic acid (LA) and cal upcycling of biomass waste
chlorophylls – from red beet stems and catalyst under mild conditions particularly in the North East.] results. Higher temperature gave better ester for the synthesis of chiral
leaves. This extraction was realised by results and about 85 wt% L was recovered pyrrolidinone (P) Y. Shen and X. Yuan have referred to the
monophasic above aqueous solution G. Gao et al have referred to polyols as M. Song et al have referred to the im- with a purity higher than 90%. The p-hy- thermochemical upcycling of biomass
and then the phase separation was rea- important biomass-based building blocks provement of the mechanical properties droxyphenyl-guaiacyl-syringyl (HGS)- S. Chakrabortty et al have reported the into high value-added fuels, chemicals
lised by a temperature switch allowing for chemical production. The title catalyst of wood-based composites and have come type L structure was confi rmed. Further title reaction for the enantio-rich 5-methylP and carbon material in molten salts, which
the desired separation. The maximum was prepared which allowed 95.7% of out with a new strategy of making bamboo improvement is possible. (ACS Omega, using readily available Ru/bisphosphine have many other useful uses. Further,
yield of betalains was 6.67 wt % and G to be converted with 90% selectivity composites with excellent mechanical 2023; DOI: 10.1021/acsomega.2C06153). catalyst (96%ee). Methyl levulinate, a solar energy can be effectively stored in
chlorophylls was 1.82 wt%. The IL used into polyols at 120°C in water. The cata- properties and formability. After delig- by-product from the industrial production molten salts. Challenges and recommen-
is specifi ed. Affi nity resins were used lyst was stable and could be recycled. nifi cation of bamboo, an alginate solution Computer aided-design of cas- of 2,5-furandicarboxylic acid (FDCA), dation are given. (Green Chem., 2023;
for recovery at 96-98% and ILs could Higher temperature gives less C2-C4 was fi lled into the voids under reduced tor bean fruit-based biorefi nery can be used in place of LA. The mecha- DOI: 10.1039/D2GC04872H).
be reused. (Green Chem., 2023; DOI: polyols. (Ind. Eng. Chem. Res., 2023; pressure to get alginated- impregnated scheme to produce sustainable nism is explained. (Chem Sus Chem,
10.1039/D2GC04480C). DOI: 10.1021/acs.iecr.2C04313). delignifi ed bamboo. Then alginate was aviation turbine fuel (ATF) 2023; DOI: 10.1002/cssc.202202353). Cascading and precise regula-
subjected successively to ionic and chemi-
Techno-economic analysis of From microbial succinic acid cal cross-linking by adding CaCl and A.G. Romero-Isquierdo et al have Valorisation of Kaffi r lime peel tion of the selective bio-produc-
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upgrading corn stover-based (SA) production to polybutylene glutaraldehyde, respectively, and then hot worked on the readily available feedstock through extraction of essential tion of 2- or 5- ketogluconic acid
acetone, n-butanol and ethanol bio-succinate synthesis pressing was done. The tensile and fl exural Higuerilla (Ricinuk communish), also re- oils and process optimisation for (KGA) from glucose (G) with
(ABE) to higher ketones and strengths were 1.12-GPa and 678-MPa, res- ferred as castor bean, as a renewable raw phenolic compounds whole-cell catalysis technology
alcohols: fuels or fi ne chemicals N. Tenhaet et al have reported a sim- pectively (much higher than that of wood material to make ATF. This crop does not
plifi ed and scalable one-pot process for composites). Reshaping can be done. (ACS require fertilisers or pesticides. ATF and P. Houng et al have referred to the pre- X. Hua et al have referred to the widely
S. Xie et al have referred to fermenta- the anaerobic production of SA using a Sustainable. Chem. Eng., 2023; DOI: other fuels are made via four main pro- sence of a good aromatic essential oil and used KGA as precursor of Vitamin C
tion-based ABE, which is known from metabolically engineered corynebacte- 10.1021/acssuschemeng.2co7232). cessing zones; 43% total hydrocarbons is phenolic compounds in Kaffi r lime peel. and tartaric acid. The latest studies have
the First World War days. However, the rium glutamicum strain. Through opti- biojet fuel. This process is self-suffi cient Hydrodistillation (HD) was used to ob- shown that Gluconobacter oxydans
concentration of ABE in the broth is low misation, succinic titre of 78 gm per litre Bio-based polyurethane reactive in terms of electricity requirements. As of tain essential oils from fresh Kaffi r lime effectively catalyses G to a mixture of the
and a complex separation process, with and yield of 1.41 mol mole has been hot-melt adhesives (PURHMAs) now it is 23 times more expensive than peel; the residual material was subjected title KGA’s, under moderate conditions –
SA
GIC
high separation costs are bottlenecks. realised. The recovery from the neutral derived from isosorbide (IS)- the product in the market. (Chem. Eng. to extraction with ethanol. The HD gave CaCO was used for neutralisation.
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fermentation broth was by electrochemi- based polyester polyols with Res. Des., 2022, 188, Dec., 746-763; terpinene-4-ol, 19%; beta-pinene, 15.8%; Whole-cell catalysis by G. oxydans was
cally-induced crystallisation and applied different carbon chain lengths DOI:10.1016/j.cherd.2022.10.025). and D-limonene, 15.6%. (J. Chem. Tech- carried out. The in situ separation of
for polybutylene bio-succinate synthesis nol. Biotechnol, 2023; DOI: 10.1002/ 5-KGA was realised with a crystallisation
using a biocompatible zinc catalyst and X. Pan et al have synthesised a series Multi-functional bacterial cellu- jctb.7354). yield of 97.3% due to difference in the
properties were comparable to the poly- of title products and the impacts of IS lose (BC) fi lms enabled by deep solubility of the two Ca salts of 2- and
mer from commercial precursors. (Che- content and carbon chain length on both eutectic solvent (DES)-extracted Integrated techno-economic 5-KGAs. Subsequently, 2-KGA-Ca
mie. Ing. Technik, 2023; DOI: 10/1002/ polyester polyols and PURHMAs were Lignin (L) and sustainability assessment of crystals were obtained. This method is
cite.202200163). studied. The products showed excellent value-added products generated promising. (Green Chem., 2023; DOI:
bonding strength on polycarbonate (PC) Q. Dai et al have reported DES-extracted from biomass gasifi cation: An 10.1039/D2GC045661).
Thus it is worth considering whether this Carbon-based metal-free cata- substrates. Bonding properties of Fe and L as a glue to strengthen the BC fi lms and energy-water-food (EWF) nexus
Al were also tested. The products showed
mixture can be upgraded. These authors lysts for selective oxidation of good tensile properties and thermal resis- endow the fi lms with diverse functiona- approach High performance, recyclable
have reported on coupling salting-out glycerol to glycolic acid (GA) tance and look very promising for the lity. DES was formed by choline chloride and sustainable by design natu-
catalytic process intensifi cation tech- adhesive industry. (Chem. Eng. Sci., 2023, and lactic acid, and when used to extract A. Alnouss et al have referred to biomass ral polyphenol-based epoxy
nique in which acetone was alkylated F. Meng et al have used heat-treated acti- 264, 31 Dec, 118152; DOI:10.1016/j. L exhibited a narrow molecular weight gasifi cation as a favoured method for valo- polyester thermosets
with ethanol and 1-butanol by Pd/C + vated carbon for the title process (where ces.2022.118152). distribution and was rich in phenol hy- risation, where the produced gas mixture
K PO , giving higher ketone and alco- the heat treatment tuned the composition droxyl groups. This integration gave fi lms is used to run power plants and clean R. Dinu et al have used renewable
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hol products, which are separated by and electronic structure of oxygen-con- Enhanced performance of Lig- with enhanced water-proof, mechanical, generation of NH and CH OH. These fl avonoid and phlorotannin extracts as
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salting-out effect of K PO . Over 70% taining functional groups). The mecha- nin (L) recovery with a CO UV shielding, gas barrier and antioxidant authors have studied the economic fea- building blocks for bio-based tris-epoxy
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mass fraction were at 200-250°C under nism is explained and C-C bond cleavage acidifi cation method 2 behaviour. Oxygen permeability and sibility of the above process and ASPEN monomers and come up with thermo-
hydrogen atmosphere. Simulations were of glyceric acid ensures high selectivity water transmission rate are given and PLUS software was used. The merits of setting resins. The triglycidyl ethers of
done. (ACS Sustainable Chem. Eng., to GA, 53.2% over AC-400 catalyst. D. Yiamsawas et al have recovered L seems to have a broad application pros- the above strategy are discussed. (ACS phloroglucinol and naringenin were
2023; DOI: 10.1021/acssuschemeng. (Chem. Eng. Sci., 2023; DOI: 10.1016/j. particles from bagasse soda pulping pect as a renewable. (ACS Omega, 2023; Sustainable Chem. Eng., 2023; DOI: combined and crosslinked with a series
th
2C07103). ces.2022.118394;268,15 March). black liquor by acidifi cation with CO DOI: 10.1021/acsomega.2C06123). 10.1021/acssuschemeng.2C04253). of anhydrides, four of them bio-based.
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180 Chemical Weekly October 10, 2023 Chemical Weekly October 10, 2023 181
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