Page 171 - CW E-Magazine (13-2-2024)

Special Report

and this was confirmed by SEM, EDS
and XPS. With the removal of PVDF,
leaching can reach 93.25% and 93.3%
for Li and Co, respectively. (Sepn. Purfn.
Technol., 2023, 324,1 Nov., 1246011;
st
DOI:10.1016/j.seppur.2023.124601).

High-efficiency leaching of Li
and Ni from spent Li-ion batte-
ries based on sodium persulfate

Q. Hu et al have reported preferential
distribution factor, and mass transfer These aspects need to be considered in leaching of Li and Ni from spent batte-
coefficient are considered. The first greater details. Deformebility of com- ries via first reduction roasting to destroy
proposal refers to the optimisation of the ponents: Particles/components in a food the stable structure of cathode, and then
operating curve, divided into cooling pro- product are usually flexible in their shape leaching with Na S O was done and in
4
2 2
cess regulation and temperature-cycling and size and they can swell or deswell. the solution Li and Ni ion exist while
+
2+
strategy. These can eliminate fine crystals.
The role of the stirring intensification is Cascaded membrane use is discussed. It
considered. The coupling technique that is possible to get many different starting
combines suspension and LMC has been materials from different feeds such as
designed. The crystal seeds generated milk, amongst others, for food produc-
above can flow into the tubular crystal- tion. This has been considered for whey
lizer and act as sites for crystal growth. protein and oligosaccharides. Reducing
An example of isophthaloyl chloride is energy consumption for removing
reported. (Sepn. Purfn. Technol., 2023, bacteria can be possible using a membrane Co and Mn remained in the residue in the
324, 1 Nov., 124428; DOI:10.1016/ process. Details of skim milk are given. form of Co O and MnO . The leaching
st
3
4
2
jspepur.2023.124428). There is an innovative opportunity, e.g., efficiency of Li and Ni were 95% and
96%, respectively. The mechanism of
Rethinking membrane processes the use of waste stream, in this case leaching was tracked through XPS,
(MPs) for food delactosed whey from a dairy plant. XRD and SEM-EDS. (Sepn. Purfn.
A lot more is to be gained in this area, Technol., 2023, 325, 15 Nov., 124653;
K. Schroen and I.B. deAugujar have given e.g., design of membranes. (Chemie. Ing. DOI: 10.1016/j.sep.pur.2023.124653).
a very useful comprehensive account Tecknik; DOI: 10.1002/cite. 202300070).
of this subject of considerable practical Optimal tunnel dryer operating
relevance. The key advantage of MPs is Lithium (Li) and Cobalt strategies for the production of
relatively low energy consumption and (Co) ceramic roof tiles under tight
it allows fractionation of various feeds
(e.g., milk) into starting materials for quality consideration
food design. There is a scope for further Sustainable approach for leach-
considerable progress in this area. The ing of Li and Co in spent Li-ion A.L. Arvanitidis et al have worked on
specific properties of the components of batteries without liberation by an existing industrial-scale tunnel and
interest need to be taken into account, overall pyrolysis the primary focus of the study was to
such as deformability in relation to the [In view of looming shortage of Li, Co, control the shrinkage stage, during
actual membrane structure. There is scope etc. it has become necessary to give which product fracture risk is highest,
to adopt cascade system. The use of high impetus to recover these valuable metals with the minimum energy cost possible.
turbulence to intensify mass transfer is from used batteries; this column has This study first gave 1.5% fuel economy.
discussed. covered some papers.] The dryer productivity was increased by
9.5%. The case of two different raw clay-
Many aspects are discussed: Particle Si-qi Jiang et al have pyrolysed undisso- based ceramics was considered. (Ind.
behaviour in flow; molecular diffusion; ciated electrode sheets at 480°C, which Eng. Chem. Res., 2023; DOI: 10.1021/
sheer-induced diffusion; internal lift. removed in an effective way PVDF acs.iecr.3C01514).

Chemical Weekly February 13, 2024 171

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