Page 172 - CW E-Magazine (22-10-2024)

Special Report Special Report

butadiene separation from C4 olefi ns Experimental scale-up and Covalent Organic Framework process to make precipitated CaCO with
3
was undertaken. High permeance of 693 technoeconomic assessment (COF) membrane with V crystal structure. A simple approach is
GPU and high selectivity over n-butene, of low-grade glycerol (G) Angstrom discrimination suggested where Ca is extracted from
2+
n-butane, isobutylene and isobutane is purifi cation from waste-based in pore size for highly OFS using NH Cl and subsequently opti-
4
reported at 9.72, 9.94, 10.31, and 11.24, biorefi nery permselective ionic liquid (IL) mizing the aqueous carbonation process
respectively. This opens a new method [Biodiesel production gives 10% by wt nanofi ltration (NF) for making high purity V, which has
of recovering butadiene. (Angew. G, which is crude.] higher added value. Addition of ammo-
Chem. Intl. Ed., 2024; DOI: 10.1002/ [ILs have found multifarious uses and nia is discussed. The conversion of V to
anie.202401118). when used in aqueous solutions its calcite crystalline phase was prevented.
T. Attarbachi et al have presented the recovery is important.] The solid residue was mainly silica gel
Conceptual methods for title process at 2000 gm scale to pro- S. Gao et al have mentioned that poly and inert reducible oxide which can be
vide a consolidated proof of concept. A
synthesis of Reactive series of physiochemical steps have been amide NF membranes offer less attractive a potential supplementary cementitious
Distillation (RD) processes implemented to get higher purity G and separation performance. These authors material. (ACS Sustainable Chem.
[This column has covered several papers recovery. Initial purity was 38-57% (by have come out, for the fi rst time, with a Eng. 2024; DOI: 10.1021/acssuschem.
on RD, which saves capital and energy wt) and ash up to 16 wt%. 85% pure G series of COF membranes, which have eng.3C07375).
non-aqueous, to reduce energy consump- out that NF, which is an energy effi cient costs.] been designed with angstrom-level pore
tion in the desorber. The regeneration process, has not yet been fully explored size discrimination and highly tuneable Integrated fi ltration
effi ciency is high. (Reaction Chem. Eng. for in situ product recovery from fer- A.A. Kiss et al (Prof. Kiss has made charge distribution on the membrane and washing modelling:
2024; DOI: 10.1039/D3RE00506B). mentation solutions. These authors have many valuable contributions in this surface for removing ILs at a conc. of optimisation of impurity
used a commercially available cellulose area) have critically discussed recent 0.05 moles per litre. More than 90% re- rejection for fi ltration and
Cost-effective preparation acetate NF membrane to separate diffe- developments in this area and consi- jection is reported along with outstanding washing of APIs
of carbonic anhydrase (CA) rent carboxylic acids from glucose in an dered the range of available approaches cycling stability. (ACS Sustainable Chem.
with superior performance aqueous solution. High stability and good for assessing the technical feasibility, Eng., 2024; DOI: 10.1021/acssuschem. B.A. Mehta et al have discussed
for assisting amino acid liquid separation performance is reported at low controllability, economic viability, and eng.3C04167). this subject and to reduce impurities
blends in CO absorption and pH. There is a previous report of an inno- sustainability of RD units. Complex Metal-Organic Cages (MOCs) in the isolated cake, a mechanistic
model-based workflow was used to
desorption 2 vative “reverse-fl ow diafi ltration” (RFD) configurations are considered, along with 71% recovery is reported. Aspen for gas adsorption and optimise. Two APIs – mefenamic acid
for a continuous fermentation with in situ with process modelling and simulation.
[As mentioned earlier there is revival removal of itaconic acid (IA), which is a (J. Chem. Technol. Biotechnol., 2023; software was used to design a plant with separation (MA) and paracetamol – were consid-
of interest is using CA with improved monomer for biopolymers. IA is usually DOI: 10.1002/jctb.7633). a capacity of 1630 kg per hr. 82 wt% fi nal ered. A model validation approach was
stability.] purity with a maximum recovery of 77% O-W. Zeng et al have referred to the used. Thus, the optimal isolation con-
recovered via crystallisation. Dead-end unique high surface area and tuneable
NF set up was used and naturally occur- Enviro-economic investigation is reported. Further, 315 kg per hour of ditions were realised. (Org. Proc. Res.
L. Mao et al have employed ferri- ring carboxylic acids – maleic acid, malic of novel heat-integrated saleable byproduct salts suitable as fer- cavity size which endow MOCs with Dev., 2024; DOI: 10.1021/acs.oprd.
tin-tagged CA variant and the purifi ca- acid and tartaric acid, citric acids – have confi gurations for pressure tiliser is reported. (Ind. Eng. Chem. Res., superior performance and broad appli- 3C00480).
tion was achieved by low-speed centri- been considered besides succinic acid and swing distillation (PSD) 2024; DOI: 10.1021/acs.iecr.3C03868). cation in gas adsorption and separa-
fugation, yielding 92% activity recovery IA. At pH 2 IA is separated from glucose tion. Aspects of ligand design, metal Separation of glufosinate
and 95% purity. 50% MDEA solution with an alpha of 22. IA separation from A. Gholani et al have presented novel Highly effi cient capture of CO node regulation, active metal site con- ammonium (GLA) and NaCl
was used at 50°C with the above CA. a fermentation broth is discussed and configuration for PSD with conside- through new amines 2 struction, cavity size adjustment and
Absorption time was reduced from 70 to glucose retention was in excess of 99%. ration for heat integration. 18 distinct [The absorption of CO in amines/ function-oriented ligand modifi cation During the production of GLA the
2
50 min at 40°C and desorption from 40 Pure IA was obtained with the separation heat integration scenarios have been alkanolamines continues to attract are covered. Challenging and future problem of separation of NaCl is en-
to 25 min at 96% in 25% of DAA + 1% factor of 60. This is very promising. (Che- systematically evaluated through a attention with respect to higher rates of directions are outlined. Highly selec- countered. A. Li et al have reported
[N1111][Gly]. This proves effi ciency of mie. Ing. Technik, 2024; DOI: 10.1002/ process simulation software in order absorption/desorption and this column tive adsorption is referred. (Chem. solid-liquid equilibrium of GLA-NaCl
CA-assisted MDEA. (ACS Sustainable cite.202300194). to come up with minimizing the Total has covered many papers.] Commun., 2024; DOI: 10.1039/D3C- system, which allows the separation.
Chem. Eng., 2024; DOI: 10.1021/acs- Annual Cost. The most economically C05935A). GLA-NaCl-H O system at 25°C,
2
soschemeng.3C07246). Effective C4 separation and environmentally friendly solution is S. Jia et al have modifi ed the secondary Synthesis of high-purity 24°C and 60°C and S-L equilibrium
3
2
Separation of biobased by zeolite MOF composite the Internal Heat Integration Distillation amino group in piperazine (PZ) with and stable Vaterite (V) via of GLA-NaCl-H O / CH OH at 60°C
aminoethyl and hydroxyalkyl moieties.
are reported. A fractional crystallisa-
Column with Divided Wall Columns,
membranes
carboxylic acids by aqueous involving vapour recompression column The intramolecular amines allow low leaching-carbonation of basic tion technology coupling evaporation
phase nanofi ltration (NF) D. Ao et al have used MOF glass as systems in both columns. Thus 66.5% regeneration energy consumption of 2.56 oxygen furnace slag (OFS) crystallisation and antisolvent crystalli-
substrates to engineer the interface with cost savings is reported. (Chem. Eng. GJ/tonne CO . DFT calculations were sation is reported. (Ind. Eng. Chem.
2
L. Rubenach et al have discussed this inorganic zeolites leading to monolithic Res. Des., 2024, 204, April, 97-111; done. (AIChE Jl, 2024; DOI: 10.1002/ There is a need to valorize OFS and Q. Res., 2024; DOI: 10.1021/acs.iecr.
separation in a detailed way and pointed structures. A challenging problem of DOI: 10.1016/j.cherd.2024. 02.033). aic.18439). Song et al have come out with the title 3C04169).
172 Chemical Weekly October 22, 2024 Chemical Weekly October 22, 2024 173

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