Page 165 - CW E-Magazine (26-3-2024)

Special Report

A rapid wrap-up of what’s new in Operations,

Processes and Products

Renewable Raw Materials

L. Hombach et al have worked on phos-
photungstic acid (PTA) immobilised on
activated carbon (AC) and have fully
characterised the catalyst. This catalyst
was used for the hydrolysis of the hemi-
cellulose xylan in aqueous medium. This
gave 74% yield of xylose. The catalyst
can be easily separated and was recycled
20 times. (Applied Catalysis A, Gene-
ral, 2023, 666, 25 Sep., 119392; DOI:
10.1016/j. apcata.2023.119392).

Furfural (F) to cyclopentanone
(CP) in aqueous phase

Selective hydrogenation and thus over a fi ne-tuned 10% Ni, 5% V.M. Kadam and G.D. Yadav have come
out with an interesting and potentialy
of polyenes in biomass-derived Co, 3% Cu and 3% Zn-Al O -hexagonal useful title process. The selected cata-
2
3
cardanol (C) over the trimetal- plate gives 76% monoene, with 7.5% lyst for aqueous phase hydrogenation
lic Ni-Co-Cu catalyst supported cardanol in n-butanol, 2.5 MPa H , 80°C. was Ni-Cu@MOF-5 (this is an example
2
on morphologically controlled This catalyst is amenable to be used on a of a bio-based process, as CP, e.g., is
alumina large-scale. (Ind. Eng. Chem. Res.,2023; obtained from adipic acid). 5 wt%
[There is increasing cultivation of DOI: 10.1021/acs.iecr.3C01526). Ni-Cu(1:1) MOF-5 gave 100% con-
cashew nuts, apart from India, in Vietnam, Carbon supported acidic version of F with CP yield of 96% at
West Africa, East Africa, etc. and thus polyoxometalates (APOM) as 150°C and 25 bar H pressure. (Ind. Eng.
2
the availability of CNSL is improving recyclable solid acid catalysts in Chem. Res., 2023; DOI: 10.1021/acs.
as a versatile phenolic substance from aqueous reactions iecr.3C01203).
renewable sources and many derivatives
are being prepared.] The hydrolysis of lignocellulosic bio- Selective hydrogenation of stea-
mass is attracting a lot of attention and ric acid (SA) to stearyl alcohol
J. Ding et al have used the title catalyst for this column has covered some papers. (SAL) over Co/Al O catalysts
the hydrogenation of polyenes, in the side Instead of homogeneous catalysts, whose 2 3
chain of CNSL, to monenes selectively separation is undesirable, heterogeneous Z. Rahmawatti et al have carried out the
to increase its further utility. The title catalysts should be attractive and more title reaction of industrial importance by
combo catalyst allows high selectivity so if these are recyclable. using the title catalyst at 300°C and 50
bar H . A series of Co/Al O catalysts
2
3
2

Chemical Weekly March 26, 2024 165

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