Basic study on direct preparation of lithium carbonate powders by membrane electrolysis

Pan, Xijuan; Zhang, Dou; Zhang, Ting‐an; Meng, Deliang; Han, Xiuxiu

doi:10.1016/j.hydromet.2019.105193

Cited by 11 publications

(2 citation statements)

References 21 publications

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“…The lithium carbonate presented sharp peaks at 20.3 , 30.5 , and 31.7 correlate with the reference data (ICDD 00-022-1141), demonstrating that Li 2 CO 3 is well crystallized. 41 The addition of lithium carbonate to the nanocomposite matrix caused a decrease in the intensity of the PVP peaks at 13 and 21 , which is attributed to the amorphous nature of PVP; probably, there was a higher interaction between the nanocomposites and lithium carbonate in the amorphous part. 6,26 In addition, the disappearance of lithium carbonate peaks in the nanocomposites suggests that the drug decreased its crystallinity and was amorphized in the polymer matrix.…”

Section: Characterization Of Pvp Nanocomposites With Lithium Carbonatementioning

confidence: 98%

Development of polyvinylpyrrolidone, inorganic nanoparticles, and lithium carbonate nanostructured systems

Farias

Silva

Tavares

et al. 2023

Polymer Engineering & Sci

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Nanocomposites with inorganic nanofillers spread in a polymer matrix have been used for the development of pharmaceutical systems to treat mental illnesses such as bipolar disorder and Alzheimer's disease. In this study, nanostructured particles using a solution intercalation technique combined with a spray‐drying process using polyvinylpyrrolidone (PVP), montmorillonite, titanium dioxide, and lithium carbonate, with the aim of designing a new drug delivery system. XRD and low‐field nuclear magnetic resonance analyses showed that PVP/MMT 1% achieved an intercalated/exfoliated morphology. However, the incorporation of TiO2 nanoparticles into the PVP matrix did not affect its structure, indicating that there was not a strong interaction between the polymer and the TiO2 nanoparticles. Thermal analysis did not reveal any changes in the nanocomposites compared to the pure polymer. Scanning electron microscopy (SEM) analysis revealed a pseudo‐spherical shape, and SEM‐energy‐dispersive x‐ray spectrometry (EDS) confirmed the dispersion of MMT in the PVP matrix. The introduction of lithium carbonate into the PVP/MMT matrix created a new system with higher molecular mobility; the drug introduction increased the mean droplet size, and the zeta potential remained negative. Overall, the results indicate that the applied methodology can produce a new nanostructured particle as a drug delivery system.

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Section: Characterization Of Pvp Nanocomposites With Lithium Carbonatementioning

confidence: 98%

Development of polyvinylpyrrolidone, inorganic nanoparticles, and lithium carbonate nanostructured systems

Farias

Silva

Tavares

et al. 2023

Polymer Engineering & Sci

View full text Add to dashboard Cite

show abstract

“…[11,12] This method reduces the impurity of ions and improves the purity of the Li 2 CO 3 ; however, it lacks direct control of the particle size. Pan et al [13] synthesized high purity Li 2 CO 3 by electrolyzing LiCl solution with a cation exchange membrane and injecting carbon dioxide into the cathode solution. Nevertheless, the D 50 size of the particles obtained was approximately 20 μm, which falls outside of the requirements.…”

Section: Introductionmentioning

confidence: 99%

Direct preparation of battery‐grade lithium carbonate via a nucleation–crystallization isolating process intensified by a micro‐liquid film reactor

et al. 2022

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With the lithium‐ion battery industry booming, the demand for battery‐grade lithium carbonate is sharply increasing. However, it is difficult to simultaneously meet the requirements for the particle size and the purity of battery‐grade lithium carbonate. Herein, the nucleation–crystallization isolating process (NCIP) is applied to prepare battery‐grade lithium carbonate without any post‐treatment procedure. The nucleation process is intensified by a micro‐liquid film reactor (MLFR), where the feedstock solution is subject to intensive shear force and centrifugal force. The feedstock solutions are mixed rapidly and a large number of nuclei form instantly in the MLFR. After nucleation, the crystallization process is achieved in another reactor. A few new nuclei form in the crystallization process. The nucleation intensification in the MLFR is verified by computational fluid dynamics (CFD) simulations and experimental results. The particle size distribution is narrower and the impurity residue in the products is far lower than that prepared by a traditional precipitation method. The effects of nucleation and crystallization on the particle size distribution and purity were investigated. In the optimized operation parameters, the particle size distribution of the Li2CO3 product is D10 = 2.856 μm, D50 = 5.976 μm, and D90 = 11.197 μm, and the purity is 99.73%, both of which meet the requirements of battery‐grade Li2CO3. Moreover, the lithium recovery rate is increased to 88.21% compared to that prepared by a traditional precipitation method (79.0%). This work provides an alternative way for the preparation of high‐purity chemicals by process intensification.

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Advantages of pH and Temperature Control in the Carbonation Stage for Li₂CO₃ Production with Sulphated Liquors

et al. 2021

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This work addresses the carbonation of an aqueous solution that simulates leach liquor with sulphuric acid, a chemical system that is seldom studied, and the subsequent precipitation of Li 2 CO 3 via evaporation of the diluent water. New details were revealed on the automatic control of pH and temperature to optimizes the carbonation operation conditions and the quality of the products. Among the relevant findings are: a) the carbonation stage was optimized at pH 12 and 35°C because, under these conditions, the redox potential (100-200 mV) promotes the carbonates stability, b) the carbonation reaction in sulphated solutions has zero order and its activation energy is 6.81 kJ/mol, suggesting that the reaction is controlled by diffusion, and c) At pH 8 and 20°C the maximum purity (99.9 % Li 2 CO 3 ) was precipitated. Additionally, other carbonate based secondary phases were precipitated together with Li 2 CO 3 . The chemical stability of these secondary phases is pH dependent and are discussed in detail.[a

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Basic study on direct preparation of lithium carbonate powders by membrane electrolysis

Cited by 11 publications

References 21 publications

Development of polyvinylpyrrolidone, inorganic nanoparticles, and lithium carbonate nanostructured systems

Development of polyvinylpyrrolidone, inorganic nanoparticles, and lithium carbonate nanostructured systems

Direct preparation of battery‐grade lithium carbonate via a nucleation–crystallization isolating process intensified by a micro‐liquid film reactor

Advantages of pH and Temperature Control in the Carbonation Stage for Li₂CO₃ Production with Sulphated Liquors

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Basic study on direct preparation of lithium carbonate powders by membrane electrolysis

Cited by 11 publications

References 21 publications

Development of polyvinylpyrrolidone, inorganic nanoparticles, and lithium carbonate nanostructured systems

Development of polyvinylpyrrolidone, inorganic nanoparticles, and lithium carbonate nanostructured systems

Direct preparation of battery‐grade lithium carbonate via a nucleation–crystallization isolating process intensified by a micro‐liquid film reactor

Advantages of pH and Temperature Control in the Carbonation Stage for Li2CO3 Production with Sulphated Liquors

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Advantages of pH and Temperature Control in the Carbonation Stage for Li₂CO₃ Production with Sulphated Liquors