Page 166 - CW E-Magazine (24-9-2024)

Special Report Special Report Special Report

tion leading to the selective production
have reported that the VPO has still The catalyst is g-C N with anchored Pd through coating TiO to sodium superi- leading to the selective production of
The catalyst is g-C N with anchored Pd through coating TiO to sodium superio-
22
3 3
4 4
1 single-atom sites. In situ studies and nic conductor (NASICON) substrate. of cyclohexanone. These authors have
some shortcomings. These authors 1 single-atom sites. In situ studies and onic conductor (NASICON) substrate. cyclohexanone. These authors have
have proposed orthorhombic Sb O as computational simulations were done The selectivity to AA+MA reached brought out an interesting finding that
computational simulations were done The selectivity to AA+MA reached brought out an interesting fi nding that
2
3
a structural directing agent for the VPO and mechanism is explained. [This is a 56% at 380 C. Here, TiO coating ca- there is a very strong dependence of
and mechanism is explained. [This is a 56% at 380 C. Here, TiO coating cata-
there is a very strong dependence of
oo
2 2
new strategy and merits consideration.] lyses the oxidative dehydrogenation selectivity upon conversion and high
catalyst. This modifi ed catalyst has new strategy and merits consideration.] talyses the oxidative dehydrogenation selectivity upon conversion and high
(Angew. Chem., 2024; DOI: 10.1002/
of M to formaldehyde, while NASI-
selectivity is maintained near com-
demonstrated considerable conversion (Angew. Chem., 2024; DOI: 10.1002/ of M to formaldehyde, while NASI- selectivity is maintained near com-
anie.202404598).
of B and MAN selectivity and yield. anie.202404598) CON carries out aldol condensation plete consumption of phenol and then
CON carries out aldol condensation plete consumption of phenol and then
of HCHO and AC resulting in AA. (J. cyclohexanol is formed rapidly. At
(Ind. Eng. Chem. Res., 2024; DOI: of HCHO and AC resulting in AA. (J. cyclohexanol is formed rapidly. At
In situ spectroscopic investiga
Catalysis, 2024, 436, August, 115612; 96% conversion, 90% selectivity
10.1021/acs.iecr.4c01127). In situ spectroscopic investiga-- Catalysis, 2024, 436, August, 115612; 96% conversion, 90% selectivity is is
tions on BiPhePhos modified DOI: 10.1016/j.cat.2024.115612) reported. (Catalysis Today, 2024, 441,
tions on BiPhePhos modifi ed
reported. (Catalysis Today, 2024, 441,
DOI: 10.1016/j.cat.2024.115612).
Rh complexes in alkene hydro-
Valorisation of CH /C H 6 Rh complexes in alkene hy- 1 Nov., 114875; DOI: 10.1016/j.cat-
st
1st Nov., 114875; DOI: 10.1016/j.
4
2
Regioselective hydroformy-
formylation
cattod.2024.114875).
[This column has covered many papers droformylation Regioselective hydroformy- tod.2024.114875)
lation with subnanometre Rh
on this subject which continues to lation with subnanometre Rh
B.N. Leidecker et al have used high-pres-
A green and moderate ap-
clusters in MFI zeolite
attract a lot of attention as natural gas B.N. Leidecker et al have used high-pres- clusters in MFI zeolite A green and moderate ap-
sure (HP) in situ transmission IR- and
sure (HP) in situ transmission IR- and
proach for the synthesis of
of the strong acid site to increase the on alkylamine-functionalised gamma- is widely available.] NMR- spectroscopy. This allowed iden- X. Dou et al have worked on the regio- proach for the synthesis of
X. Dou et al have worked on the regio-
NMR- spectroscopy. This allowed identi-
methyl formate (MF) via
selectivity. (Chem. Eng. Technol., 2024; alumina for the title reaction. Gamma Atomically dispersed Fe-Cu tification of most relevant components. selective title reaction based on linear methyl formate (MF) via
fi cation of most relevant components. selective title reaction based on linear
dimethoxymethane (DMA)
DOI: 10.1002/ceat.202300171). Al O was amino-functionalised by dual-metal sites synergistically The hydrido complex of the type e,e-[H- alpha olefins leading to linear alde- dimethoxymethane (DMA)
The hydrido complex of the type e,e-[H-
alpha olefi ns leading to linear alde-
2
3
disproportionation over H-
surface silylation with 3-aminopropyl- Ph(CO) (PՈP)) represents the dominant hydes with solid catalyst giving result disproportionation over H-ze-
Ph(CO) (PUP)) represents the dominant hydes with solid catalyst giving result
Value-added upcycling of PET triethoxysilane, and then Ru species boost carbonylation of CH 4 2 2 olites
zeolites
resting state. Further details are given comparable to homogeneous catalyst.
to 1,4-cyclohexanedimethanol was anchored onto the above catalyst Q. Cheng et al have come out with a resting state. Further details are given comparable to homogeneous catalyst.
in the paper. (Cat. Sci. Technol., 2024; These authors have designed an efficient
in the paper. (Cat. Sci. Technol., 2024; These authors have designed an effi cient
(CHDM) by a hydrogenation/ and fully characterised. At 100 C and fascinating way of carrying out liq- DOI: 10.1039/D4CY00481G) Rh-zeolite catalyst where subnanometre L. Yang et al have developed the ti-
L. Yang et al have developed the ti-
o
DOI: 10.1039/D4CY00481G).
Rh-zeolite catalyst where subnanometre
hydrogenolysis relay catalysis 4 MPa H pressure the conversion of uid-phase oxidative carbonylation of Rh clusters are selectively confined in tle process, which has potential to
tle process, which has potential to
Rh clusters are selectively confi ned in
2
Direct synthesis of acrylic acid
XDA was 99.7% and selectivity was CH to CH COOH. Under optimised Direct synthesis of acrylic acid compete with the carbonylation of
compete with the carbonylation of
the sinusoidal ten-membered-ring chan-
Valorisation of PET waste into val- 95%. Leaching of Ru was avoided. 4 3 (AA) from methanol (M) and the sinusoidal ten-membered-ring chan- methanol with CH ONa as a catalyst.
(AA) from methanol (M) and
methanol with CH ONa as a catalyst.
nels of MFI zeolite. C-6 to C-12 olefi ns
ue-added products, apart from recyc- (Reaction Chem. Eng., 2024; DOI: acetic acid (AC) over a con- nels of MFI zeolite. C-6 to C-12 olefins Almost 100% conversion of DMM is is
3 3
acetic acid (AC) over a con-
Almost 100% conversion of DMM
were used. Linear to branched aldehydes
ling, has attracted a lot of attention. Z. 10.1039/D3RE00712). structed TiO -coated NASI- were used. Linear to branched aldehydes reported under moderate conditions of
structed TiO -coated NASI-
reported under moderate conditions of
ratio was upto 400. (Nature Catalysis,
Sun et al have come out with a potenti- CON catalyst 2 2 ratio was upto 400. (Nature Catalysis, 0.1 MPa and 120 C. H-SSZ-13 shows
0.1 MPa and 120 C. H-SSZ-13 shows
o o
2024, 7, 666-677).
ally useful way as per the title. CHDM In situ tailoring the crystalline CON catalyst 2024, 7, 666-677) superior stability. It seems HCHO is
superior stability. It seems HCHO
is a key ingredient for advanced special- defects of Titanium Silicalite-1 J. Wang et al have worked on the ti- ti- Phenol is its own selectivity a crucial precursor. (Applied Catal-
J. Wang et al have worked on the
Phenol is its own selectivity
is a crucial precursor. (Applied Cata-
ty polymers. Here a dual-catalyst sys- (TS-1) to improve the 1-butene tle process and concomitantly methyl promoter in low-temperature ysis A: General, 2024, 683, 5 Aug.,
tle process and concomitantly methyl
lysis A: General, 2024, 683, 5 Aug.,
tem involving Pd on reduced graphene epoxidation performance acrylate (MA), which is potentially promoter in low-temperature 119860; DOI: 10.1016/j.apcata.2024.
acrylate (MA), which is potentially
119860; DOI: 10.1016/j.apcata.2024.
liquid-phase hydrogenation
oxide (Pd/r-GO) and oxalate-gel-derived cheaper process compared to propyl- liquid-phase hydrogenation 119860)
cheaper process compared to propy-
119860).
Cu-Zn oxide (og.CuZn), which lead T. Guo et al have reported a modifi ed ene to AA via acrolein. These authors J. Bell et al have referred to the use of
lene to AA via acrolein. These authors J. Bell et al have referred to the use of
to hydrogenation/hydrogenolysis, was hydrothermal synthesis process to in have designed a novel catalyst system Pd/C type catalyst for the title reaction
have designed a novel catalyst system Pd/C type catalyst for the title reac-
Caprolactam (CPL) to hexam-
adopted. The overall yield is reported situ tailor the framework defects of Caprolactam (CPL) to hexam-
ethylenediamine (HMDA) via
at 95%; purifi ed CHDM isolated yield TS-1. Details are given in the paper for ethylenediamine (HMDA) via
6-aminocapronitrile (ACN)
was 87% with a notably higher trans/ modifi cations. The epoxide selectivity conditions, an unprecedented acetic 6-aminocapronitrile (ACN)
cis ratio of up to 4.09/1, which is higher could reach 98% and H O effi ciency acid yield of 40.5 mmol per gm
2
2
K. Geng et al have carried out the ti- ti-
than that of the commercially available could approach 98.6%. (Ind. Eng. cat per hr. at 50 C was obtained. DFT K. Geng et al have carried out the
o
tle reaction through a two-step route
CHDM. (Angew. Chem. Intl. Ed., 2024; Chem. Res., 2024; DOI: 10.1021/acs. calculations were done, and the mech- tle reaction through a two-step route
involving CPL ammoniation and ACN
DOI: 10.1002/anie.202408561). iecr.4c01380). anism is explained. (Angew. Chem. involving CPL ammoniation and ACN
hydrogenation. Mesoporous alumina
Intl. Ed., 2024; DOI: 10.1002/anie. hydrogenation. Mesoporous alumina
Effi cient aqueous-phase hydro- Regulation of maleic anhy- 202411048). was used as a highly active and cost-ef-
was used as a highly active and cost-ef-
genation of m-xylylenediamine dride (MAN) selectivity for fective catalyst for CPL ammoniation
fective catalyst for CPL ammoniation
(XDA) to 1,3-cyclohexandi- n-Butane (B) oxidation by Highly selective photocatalytic and subsequent dehydration of amide
and subsequent dehydration of amide
methylamine (CHDA) over a Sb O -modifi ed vanadium synthesis of acetic acid (AA) at to nitrile. At 58% CPL conversion, the
to nitrile. At 58% CPL conversion, the
3
2
o o
selectivity of ACN was 98% at 320 C.
highly active and stable Ru phosphorus oxide (VPO) 0-25 C selectivity of ACN was 98% at 320 C.
o
Subsequently, commercial Raney Ni
catalyst catalyst Subsequently, commercial Raney Ni
X. Zong et al have conducted the con- was used for hydrogenation, giving
was used for hydrogenation, giving
J. Guo et al have reported a highly The title process was an important version of C H through photocatalytic 100% HMDA. (Green Chem., 2024;
100% HMDA. (Green Chem., 2024;
2
6
active and stable Ru catalyst supported breakthrough process. J. Zhao et al selective oxidation by H O at 0-25 C. DOI: 10.1039/D4GC02268H)
DOI: 10.1039/D4GC02268H).
o
2 2
167
166 Chemical Weekly September 24, 2024 5 Chemical Weekly September 24, 2024 Chemical Weekly September 24, 2024
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