Page 170 - CW E-Magazine (9-1-2024)

Special Report

reaction, at higher reaction temperature
and moderate catalyst-oil ratios (C/O).
With Y-zeolite, at 600 C, C/O ratio of
o
10, conversion may reach about 65%;
the yield and selectivity of BTX are
about 55% and 53.6%, respectively. (ACS
Omega, 2023; DOI: 10.1021/acsome-
ga.2c06507).

Accessing secondary amine con-
taining fine chemicals and poly-
mers with an earth-abundant
hydroaminoalkylation catalyst

M. Manben et al have reported addition
An efficient porous acidic ionic Inappreciable deactivation is reported. of secondary amines to diverse alkenes
liquid polymer (PAILP) catalyst (Angew. Chem. Intl. Ed.; DOI: 10.1002/ with branched regioselectivity using
for Friedel-Crafts acylation anie.202304244). Ti(NMe ) and urea ligand. Both 1,1-
2 4
reaction P/W-doped ZSM-5 composites and 1,2-disubstituted alkenes could be
[A number of attempts have been made to with a hierarchical structure for transformed. This is a greener process.
carry out acylation reaction of aromatics efficient production of 2,6-diiso- (Green Chem., 2023; DOI: 10.1039/
using benign catalysts in place of AlCl .] propylnaphthalene (DIPN) D3GC00011G).
3
2+
J. Zhao et al have made a solid catalyst DIPN is industrially important and is Atomically dispersed Co on
made from p-divinylbenzene-vinylimida- made by alkylation of naphthalene with MgAlO boosting C 4-10 alcohols
x
zole modified with 1,3-propanesultone propylene, where selectivity problem selectivity of ethanol (E) valori-
and trifluoromethanesulfonate. This was is important. J. Mei et al have used the sation
used to give excellent conversion and [A number of papers have appeared
selectivity for anisole to p-methoxyaceto- on the conversion of E to n-butanol
phenone using acetic anhydride. Other and some have been covered in this
aromatic substrates also work. (Cataly- column.]
sis Sci. Technol., 2023; DOI: 10.1039/
D3CY00303E). W. Luly et al have reported the title
catalyst, derived from layered double
Hierarchical LTL zeolite as an
efficient and sustainable solid
acid catalyst for replacing HCl
in the production of polyure- title catalyst, which was found to be
thane intermediates superior to other zeolite catalysts. (Ind.
Eng. Chem. Res., 203; DOI: 10.1021/
acs.iecr.2c04248).
S. Lee et al have reported the use of
methylenedianiline (MDA) – an inter- Dealkylation in FCC condition
mediate for MDI-based polyurethanes – for efficient conversion of heavy
by the reaction of aniline and form- aromatics to BTX
aldehyde, based on the title catalyst, hydroxide (LDH) precursors for the title
rather than HCl, which is used and which D. Wang et al have referred to C + reaction. At about 30% conversion of E
9
causes some problems. The title catalyst aromatics (C -C -boiling points 140- the selectivity for C-4 to C-10 alcohols
11
9
exhibits unprecedentedly high activity, 216 C) in naphtha and have reported that reached about 95%. The catalyst was
o
selectivity to 4,4-MDA and inhibits catalysts with large pore size and strong fully characterised. (Green Chem.,
the formation of undesired isomers. acid sites are favourable for the title 2023; DOI: 10.1039/D3GC00078H).
170 Chemical Weekly January 9, 2024

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