Page 172 - CW E-Magazine (9-1-2024)

Special Report
ION
Servier clinical candidate, S44819. Air from acridine and the mineral acid, and on hexagonal boron nitride for stable CHEMICALS
was used for oxidation using Cu/TEMPO phase-transfer catalyst is used. (Nature and effi cient conversion. These authors
as catalyst. (Green Chem., 2023; DOI: Catalysis, 2023, 6, 196-203). carried out hydrogenation of MDA in
10.1039/D3GC00579H). fi xed-bed reactor, which ran for more
Stability enhancement for silver than 200 hours. DFT theory gave a clue
CH to HCOOH (Ag) catalyst in ethylene epoxi- that the hydrogenation rate of the second
4
[Direct conversion of CH to CH OH, dation by support treatment ring is comparatively slower. This catalyst
3
4
C H , etc. is attracting a lot of atten- [In 1930’s we saw this remarkable gave excellent performance. (Ind. Eng.
2
4
tion and this column has covered some breakthrough of O based epoxidation of Chem. Res., 2023; DOI: 10.1021/acs.
papers.] 2 iecr.3c00985).
ethylene and since then through thorough
F. Gu et al have used Rh dispersed on understanding the selectivity has been NEW BIOMASS
ZSM-5 for converting CH with O , CO improved greatly.] Metathesis of ethylene with
4
2
and H O to HCOOH, at total pressure 2-butene BRIQUETTE BOILER
2
of 40 bar, at below 100 C. Promoted C. He et al have reported that etch- [Metathesis was a very important break-
o
by H , the activity could reach 3.56 ing-treatment of alpha-Al O support by through process when, at that time,
+
2
3
mol HCOOH/mm Rh/hr and 23.96 mol NH F improves roughness of its surface propylene was in excess and Phillips con- FOR SALE
4
HCOOH/mol Rh/hr at 50 C and 90 C. and stability of silver catalyst is greatly verted this to ethylene and 2-butene; now
o
o
It is fascinating that the selectivity of the reverse is practiced on a large scale.] UNUSED PACKED CONDITION
HCOOH was 98.48%. (ACS Catal.,
2023, 13, 9509-9514; DOI:10.1021/ Q. Zhang et al have reported performance
acscatal.3c01743). descriptors for catalysts based on Mo,
W, on Rh oxides for the title reaction.
Anti-Markovnikov (AM) hydro- These authors have adopted steady-state
chlorination and hydronitrooxy- isotopic transient kinetic analysis and
lation of alpha-olefi ns (AO) via the intrinsic reactivity of metal carbenes Accessories
visible-light photocatalysis have been determined, which should be MAKE
helpful in the design of the catalysts. Thermax Limited Pressure parts - Shell and smoke tubes assembly with sub system
J. Kim et al have reported the title pro- enhanced. This also results in higher (Angew. Chem. Intl. Ed.; DOI: 10.1002/ Reciprocating grate assembly with sub system
cess as HCl addition to AA happens via selectivity for ethylene oxide. (Catalysis anie-202308872). Screw feeders for fuel feeding along with service hopper
M route only and we get Cl in the alpha Communications, 203, 178, May, 10669; TYPE Grate bed conveyor for continuous ash removal
position and not the terminal position DOI: 10.1016/j.catcom.2023.10669). NH decomposition catalysts Combipac with Reciprocating grate Economizer with associated equipment
(These alkyl chlorides are typically made 3 System of Lambion, German Technology De-aerator with storage tank
from ROH + HCl). This route allows Hydrogenation of aromatic NH is emerging as useful H carrier
3
2
even making of primary alcohols. This amines to alicyclic amines and it has been commercially adopted Chemical dosing system
is an interesting development as aque- even for burning in turbines for power CAPACITY 2 Air Pollution control equipment - ESP (SPM < 30 mg/nm3) with stack
ous HCl and HNO can be reacted with This is of commercial importance and generation with no CO emission. When 16TPH, Design Pressure - 26 Kg/cm analyzer system, external chimney
3
2
unactivated alkenes. In situ generation Z. Han et al have come out with highly H is to be obtained NH decomposition ID, FD fan assembly, integral feed water system
2
3
of photoredox-active ion pairs, derived dispersed Ru nanocrystals anchored is required and this requires a robust OPERATING PRESSURE Instrumentation, PLC based SCADA control system, Electrical Infra - MCC &
catalyst (this aspect has been covered in 24 Kg/cm 2 VFD
this column). Combustion duct and fuel gas duct system, air compressor with dryer
system, PRV station, weighbridge
C. Zheng et al have reported research FUEL Insulation, refractory, support structure, piping, valves, cabling
status, optimisation strategies and future BIOMASS BRIQUETTE Engineering drawings and documentation
prospects on this important subject. NH
3
has 17.6 wt% of H ; and lower tempera-
2
tures are required for decomposition.
Ru, Fe, Co, Ni, etc. based catalysts are GET IN TOUCH
reviewed with the methods of catalysts
preparation, supports, promoters, etc. +91 99690 52940 santosh.patil@ionchemicals.in Juinagar,
(Ind. Eng. Chem. Res., 2023; DOI: +91 86557 19139 www.ionchemicals.in Navi Mumbai
10.1021/acs.iecr.3c01261).
*images shown are for illustration purpose only
172 Chemical Weekly January 9, 2024

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