Page 170 - CW E-Magazine (27-8-2024)

Special Report
Ligand-engineered Zr-
MOF membranes with fast
water transport channels for
alcohol-water solution
B. Mo et al have reported that MOF
membranes with rich functionality and
a tuneable pore system are promising for
molecular separation. Aperture size can
be manipulated to allow fast and selec-
tive permeation of water over alcohol
molecules. Thus butanol/water separa-
tion was performed with total fl ux of
5,226-gm m hr and separation factor
-2
-1
-1
of 1,281, and water content of 99.3% in
the permeate. (AIChE Jl., 2024; DOI:
heat and pressure, particularly for pharma are different from commercial-scale dis- 10.1002/aic.18368).
applications. This is based on forward-os- tillation. Column internals and column
mosis system, which uses a hollow fi bre sizing software are discussed. Pumps, Experimental and
membrane module and a draw solution. flowmeters, control valves, types of computational studies on
Thus water is removed without the loss trays and packing are different in pilot isolation of cardanol from
of APIs. Highly soluble liquids like THF, facilities. Appropriate sample points
toluene or methanol can bring down water or overline analyses capabilities and Cashew Nut Shell Liquid
content below 1,000-ppm without apply- instrumentation have to be provided. (CNSL) using diethanolamine
ing heat or pressure. A variety of solvents Flexibility has to be provided. Aspects (DEA) based deep eutectic
can be handled. (Chem. Eng. Magazine, of high-vacuum operation, heat con- solvent at different molar
2024, Feb.). trol, refl ux control, distillate and side ratios
stream product are discussed. Glass
Innovations in pilot-plant Oldershaw-style trays are commonly V. Malaiyarasan et al have amine-based
distillation process design used; “off-the-shelf” components in Deep Eutectic mixture composed of
the range of dia from 28 to 100 mm are choline chloride with DEA-based hydro- has witnessed meteoric rise and here the waste PCBs, the core of e-waste, which
G. Graham and R. Rocks, AVP Corp., referred; scale-up is facilitated by pilot gen bond donor in different mole ratios.
have reported specific concerns in facilities. (Chem. Eng. Magazine, 2024, Ethyl acetate and MIBK could be used
small-scale distillation processes which Feb. issue). as co-solvents. Temperature was varied
from 20°C to 70°C at 1 atm. Thermal
stability of the solvent was checked.
Cardanol extraction details are given. (J.
Chem. Technol. Biotechnol., 2024; DOI:
10.1002/jctb.7612).
Enhancement of separation
performance for ofl oxacin (O)
enantiomers by a biphasic
recognition chiral extraction
(BRCE) system
J. Li et al have worked on separation of
enantiomers via BRCE. The case study
of O was taken using beta-cyclodextrin
as hydrophobic and hydrophilic selec-
tors. Enantioselectivity value of 2.4 and
170 Chemical Weekly August 27, 2024
Contents Index to Advertisers Index to Products Advertised
Special Report
enantiomeric excess of 26% is reported.
By adopting fi ve-stage counter-current
extraction and reverse extraction the ee
value could be improved to 91%. Mole-
cular simulations were done. (AIChE Jl.,
2024; DOI: 10.1002/aic.18367).
Absorption of methyl
mercaptan (MM)
P. Liang et al have screened physical sol-
vents using quantum chemical calcula-
tions coupled with experiments. DMSO,
Sulfolane (SLL), propylene carbonate with polymer RO membranes. RO mem- acid works for Sn with high selectivity.
(PC), DMF and NMP were considered branes having assumed hypothetical per- Thus FA-ChCl extracted Cu and Fe at
using the COSMO-RS model. The order meance values for ethanol 0.1 time and 100°C. Oxalic acid (1M) removed Sn
was NMP> PC> DMSO> SLL> DMF. water of 2 times proved to be feasible at 80°C. (ChemSusChem, 2024; DOI:
The treatment of sour natural gas which to realise lower energy consumption. 10.1002/cssc.202301418).
contains H S, COS, CH SH is discussed. (J. Chem. Eng. Japan, 2024, 57, Issue1;
2
3
(ACS Omega, 2023; DOI: 10.1021/ DOI: 10.1080/00219592.2023.2294934).
acsomega.2C06173). Thermally self-suffi cient heat
Green Deep Eutectic Solvents pump-assisted azeotropic
Analysis of RO separation (DESs) for sustainable dividing-wall column (DWC)
performance of ethanol (E) for biofuels recovery from
water mixtures and design recovery from thermally isopropanol-butanol-ethanol
of ethanol concentration treated PCBs: A greener (IBE) fermentation
processes alternative to conventional
methods T. Jankovic et al (Prof. A.A. Kiss and
coworkers) have reported that IBE
Ethanol production via fermentation S. Mishra et al have worked on the fermentation is superior to acetone-
butanol-ethanol (ABE) due to better pro-
concentration of E rarely crosses 12% are rich in Cu, Sn, Zn, Fe, and Ni, to perties. A novel thermally self-suffi cient
and energy consumption constitutes an recover these valuable metals. PCBs and eco-effi cient downstream process
important factor in making azeotropic from mobile phones were treated with is reported for a 74,000-tpa capacity
mixture and absolute. E.K. Akamatsu Choline Chloride based DESs. Formic from a highly dilute broth having over
et al have successfully analysed the acid (FA)-ChCl had maximum solubility
RO separation performances of E/water of Cu, Fe, and Ni, while urea-ChCl had 97 wt% water. Gas stripping and heat
mixtures, with E conc. from 1-37 wt%, high Zn selectivity and solubility. Oxalic pump-assisted vacuum evaporation was
implemented for the products from the
broth. An advanced highly integrated
heat-pump assisted azeotropic DWC
was designed to give high purity (99%
wt) butanol and isopropanol-ethanol
fuel supplement (89 wt%). It is cost
effective at $0.130/kg IBE and energy
consumption of 0.673 KWeh/kg IBE.
Full recycle of biomass and most
of the separated water is reported.
(Chem. Eng. Processing – Process
Intensification, 2024,197, March,
109689; DOI:10.1016/j.cep.2024.
109689).
Chemical Weekly August 27, 2024 171