Page 169 - CW E-Magazine (26-12-2023)

Special Report Special Report

A novel method of iron oxalate can separate 1-butene isomers through via ion exchange coupled with thermal 94%. The roasting leads to LiNa(SO ), Intensifi ed extraction of rare to be useful. (ACS Omega, 2023; DOI:
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production through the valori- molecular exclusion. Dynamic break- treatment. Molecular dynamic simulations LiMnO , NiO, LiMn O , Co S , and earth elements (REEs) from 10.1021/acsomega.2C08299).
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sation of red mud (RM) through experiments confirmed the were done. Ba-ETS-4-350 exhibited the Ni, CO, and Mn. (J. Enviromental coal fl y ash (CFA)
[The production of alumina, for the pro- excellent separation performance, easy largest-equilibrium selectivity of 12.42. Chem. Eng., 2023, 11, issue3, 110060; [CFA has been a source of many mate- Study on HCl removal by glyce-
duction of aluminium, requires treatment regeneration, and remarkable reusability. Adsorption sites of CO were recognised. DOI:10.1016/j.jece.2023.110060). rials and there are references to making rol (G) in a rotor-stator reactor
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of bauxite with NaOH and a lot of red (Angew. Chem. Intl. Ed.; DOI: 10.1002/ (Ind. Eng. Chem. Res., 2023; DOI: Toward more sustainable hydrau- even zeolites.] (RSR) and desorption of HCl
mud accumulates, which is a source of anie.202303671). 10.1021/acs.iecr.3C01079). lic binders: controlling calcium
nuisance and hazard. It can be profi t- PVDF bubble caps for distilla- Separation of limonene (L) and sulphate phase selection via spe- F. Lomanjaya and J-C. Liu have referred H. Jin et al have referred to the uncom-
ability valorised and this column has tion columns p-Cymene (PC) from the light cifi c additives to CFA as one of the promising second- mon emission of HCl in fl ue gas, which
covered this topic.] fractions of tire pyrolysis oil ary sources of REEs. These authors have poses threats to environment and human
There is a problem about the material S. Reigl et al have referred to Bassanite, worked on two intensifi ed extraction health, and its removal has attracted
E. Degregorio et al have worked on of construction of bubble caps in a distilla- (TPO) CaSO hemihydrate, as one of the most methods, subcritical water extraction attention. A RSR was used as an absorber
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valorising RM where rare earths can be tion column handling corrosive systems Many tires have natural rubber as the extensively used inorganic binders in con- (SWE) and microwave assisted extrac- with G as the absorbent; operating vari-
obtained and here these authors have and stainless steels are not useful. S. basis, which is polyisoprene, and pyrolysis struction application. The current process tion (MAE), in the recovery of REEs, ables were studied and data on mass
worked on the recovery of iron as Fe(II) Upadhye and H. Mistry have reported gives isoprene which gets converted to is based on the thermal dehydration of including yttrium (Y) and samarium transfer coeffi cient were obtained. The
oxalate. Four types of acids have been a case study of a corrosive system asso- L and PC is also formed. The separation gypsum, which consumes energy. These (Sm). Their results show a total of 80.3% inlet gas contained HCl varying from
used – HCl, H SO , H PO , H C O for ciated with separation in a phosphoric of L from PC poses problems as it has authors have succeeded in getting the Y and 68% Sm recovery using SWE 700 mg/cu.m. to 2400 mg/cu.m. and the
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iron extraction from RM. (These authors similar melting points and boiling points. hemihydrate by spontaneous precipitation at 1.0 N HCl, S/L of 5 gm/litre, 150°C removal % was still 94.5%. Desorption
have considered the source from Mon- Thus the separation is done via epoxida- from supersaturated solution at moderate for 5 min. MAE also yielded leaching was done at 170°C. G could be recycled.
tenegro). HCl shows high Fe extraction tion of L, which then has higher boiling temperature. There is emphasis on the effi ciency of 72% of Y and 54.5% of (Chem. Eng. Process – Process Intensifi -
capacity, giving a solution of 22.6%. point and separation can be realised. presence of specific additives during Sm at 2.0 N HCl, S/L of 2.5 gm per litre cation, 2023, 190, August, 109410;
These authors worked on pre-extraction L-epoxide also has commercial impor- crystallisation. This could happen even at 150°C for 5 min. SWE seems to be DOI:10.1016/j.cep.2023.109410).
with HCl followed by treatment with tance. (Sep. and Purfn. Technol., 2023, at 40°C with added conc. of only 0.1M more attractive. (J. Chem. Technol. Bio-
oxalic acid to precipitate Fe (C O ) .2H O 319, 15 Aug., 124068; DOI:10.1016/ or even less. (ACS Sustainable Chem. technol., 2023; DOI: 10.1002/jctb.7451). From the conventional to the
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with a purity up to 96%wt. acid plant. These authors, from Arkema jseppur.2023,124068). Eng., 2023; DOI: 10.1021/acssusche- intermittent biodrying of orange
and Sangir Plastics, have come out with meng.3C00429). Effect of the structure of highly solid waste biomass
(It may be noted that for 1 tonne of PVDF bubble caps, which have worked Na SO roasting for preferential porous silica extracted from
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Al, 0.9-2.0 tonnes residue is formed satisfactorily in the plant where corro- Li extraction from cathode mate- Bioinspired design of a giant sugarcane bagasse (SCB) fl y ash G.D. Maia et al have reported biodrying
and the annual production is about 120 sion was encountered. (Chem. Eng./Mc- rial of spent Li ion batteries (Mn86] nanocage-based MOF on Afl atoxin B1 (A) adsorption of orange solid waste biomass in three
mtpa) (Chem.Eng.Res.Des., 2023; DOI: Graw Hill Magazine, 2023, June issue). [The recovery of valuable components with specifi c CO binding pockets operation modes; conventional full load
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10.1016/j.cherd.2023.04.036, Vol. 194, of Li ion batteries like Li, Ni, Co, etc. for highly selective CO sepa- and long operation time (CFLT); con-
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June, 95-104). Enhancing size-selective is receiving a lot of attention due to the ration Most cane-sugar factories burn SCB and ventional partial load and short operat-
adsorption of CO /CH on ETS-4 obvious economic benefi ts and this column thus fl y ash is readily available. The fl y ing time (CPST); and intermittent par-
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Molecular exclusion separation via ion-exchange coupled with has covered some papers.] [The removal of CO from a variety of ash contains SiO and Al O and can be tial load biodrying with homogenisation
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streams, by different absorption, adsorp-
used to make aluminosilicate, which is a
of 1-butene isomers by a robust thermal treatment tion and membrane-based operations has good adsorbent. The concentration of A (IPST). It seems IPST shows signifi cant
Z. Yang et al have worked on using
MOF under humid conditions Q. Peng et al have referred to the Na SO for roasting to valorise Li and this received a lot of attention and this column can be reduced by using the absorbent as improvement in the moisture transport
mechanisms and is advantageous. [The
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tunability of pores in ETS-4. They have is done at 750°C and the molar ratio of has covered many papers.] per the title. The structure of recovered world production in the citrus industry
[There is a lot of activity in adsorption synthesised Na-ETS-4 by the hydrother- Na SO to spent cathode material of 3. silica was studied by S. Sungsinchai of solid by-products, in the form of peel,
based diffi cult separations due to energy mal method and additionally modifi ed The leaching effi ciency of Li reaches S. Geng et al have come out with a novel et al and compared with bentonite. Dif- seed, branches, exceeds 70-mtpa; in
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saving and lower capital investment and strategy for making CO -selective absor- ferent absorbents were made and found 2019 citrus production was 140-mtpa.
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this column has covered many papers.] bents, which are bioinspired. These have Citrus-cellulose production is
unique enzyme-like confi ned pockets, done via pioneering way by the
X. Huang et al have reported a robust and strong coordination, which results in Italian company, Orange Fiber;
ultramicroporous MOF (MET-Fe) that only CO molecules to fi t in the pockets nanocellulose is also produced.
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and other gas molecules are prohibited. There is a reference to the reco-
These authors have reported record-high very of hesperides.] (Chem. Eng.
selectivities of CO /CH and CO /N mix- Process – Process Intensifica-
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tures, which were verifi ed by experimen- tion, 2023, 188, June, 109361;
tal breakthrough tests. (Angew. Chem. DOI:10.1016/j.cep.2023.
Intl. Ed.; DOI: 10.1002/anie.202305390). 109361).
168 Chemical Weekly December 26, 2023 Chemical Weekly December 26, 2023 169
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