Korean Journal of Chemical Engineering最新文献

Study on the Dissociation of Cryolite in SPL

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2025-03-06 DOI: 10.1007/s11814-025-00412-5

Fangheng Tang, Xiping Chen, Hao Liu, Hongwei Xuan

{"title":"Study on the Dissociation of Cryolite in SPL","authors":"Fangheng Tang, Xiping Chen, Hao Liu, Hongwei Xuan","doi":"10.1007/s11814-025-00412-5","DOIUrl":"10.1007/s11814-025-00412-5","url":null,"abstract":"<div>The spent pot lining of aluminum electrolysis (SPL) is a typical harmful solid waste discharged from the production process of primary aluminum. It contains about 30% of fluoride and 0.2% of cyanide, which is a valuable fluorine-containing resource. With SPL as raw material, sodium carbonate was used as a reagent, and dissociation of cryolite was investigated by a baking process. Gibbs free energy of cryolite dissociation was calculated and the reaction mechanism of cryolite was discussed. At the same time, the effects of reagent addition ratio, baking temperature and reaction time on the dissociation of cryolite in SPL were discussed. The results show that under the conditions of a reagent addition ratio of 30–35wt%, baking temperature of 800–850 ℃, and reaction time of 3–3.5 h, the phase of cryolite and mullite in the SPL disappears, cryolite is transformed into sodium fluoride and sodium metaaluminate compounds, and mullite is transformed into nepheline or feldspar. The concentration of fluoride ion in clinker leaching solution increased to 8.84 g/L, almost two times that of primary concentration 4.56 g/L in SPL, and the effect of dissociation was obvious, which will be beneficial to the subsequent recovery of fluorides.</div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 4","pages":"867 - 875"},"PeriodicalIF":2.9,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison of Radioisotope Adsorption Capability in Metal Organic Frameworks Through DFT Simulation

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2025-03-03 DOI: 10.1007/s11814-025-00425-0

Hwanhui Lee, Jeongho An, Kunok Chang

引用次数: 0

Template-Based Fabrication of Copper Oxide for Persulfate Activation: Investigating Non-radical Mechanisms in Efficient Bisphenol a Degradation

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2025-03-03 DOI: 10.1007/s11814-025-00413-4

Jiayun Liu, Zhiyi Lai, Kaiyong Wang, Jianning Wu, Shengchao Yang, Zhiyong Liu, Guihua Meng, Xuhong Guo

{"title":"Template-Based Fabrication of Copper Oxide for Persulfate Activation: Investigating Non-radical Mechanisms in Efficient Bisphenol a Degradation","authors":"Jiayun Liu, Zhiyi Lai, Kaiyong Wang, Jianning Wu, Shengchao Yang, Zhiyong Liu, Guihua Meng, Xuhong Guo","doi":"10.1007/s11814-025-00413-4","DOIUrl":"10.1007/s11814-025-00413-4","url":null,"abstract":"<div>Currently, advanced oxidation processes (AOPs) are an efficient method for the degradation of recalcitrant organic pollutants. In this work, copper oxide (CuO) catalysts were synthesized using mesoporous silica (SiO2) as a template for the activation of peroxomonosulfate (PMS) for the removal of the target pollutant bisphenol A (BPA). The results showed that the CuO catalysts not only increased the specific surface area and active sites, but also enhanced the efficient activation of PMS to produce a large amount of reactive oxygen species. In this paper, the degradation process and mechanism of BPA by CuO in PMS activation system were comparatively investigated by characterization data and experimental data. Under the optimum conditions, the degradation rate of BPA (30 mg/L) was as high as 97.8%, which was basically completely degraded. The CuO/PMS catalytic system involves both radical and non-radical pathways, with the non-radical 1O2 being the main reactive oxygen species for the degradation of BPA. The reaction intermediates were identified by liquid chromatography–mass spectrometry (LC–MS), and the degradation mechanism and the degradation pathway of the catalyst were proposed. It was shown by cycling experiments that the degradation rate of BPA in the system reached more than 65% at 60 min when the catalyst CuO was reused for the fifth time. This indicates that CuO has good stability. This study provides strong evidence that 1O2 is the main active agent for degradation in the PMS-induced inhomogeneous catalytic oxidation system.</div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 4","pages":"843 - 855"},"PeriodicalIF":2.9,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Study of Shape-Stabilized Phase Change Materials Based on High-Density Polyethylene and Expanded Graphite

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2025-03-01 DOI: 10.1007/s11814-025-00427-y

Dan Zhou, Bo Li, Xinghui Liu, Yi Zhang

{"title":"Experimental Study of Shape-Stabilized Phase Change Materials Based on High-Density Polyethylene and Expanded Graphite","authors":"Dan Zhou, Bo Li, Xinghui Liu, Yi Zhang","doi":"10.1007/s11814-025-00427-y","DOIUrl":"10.1007/s11814-025-00427-y","url":null,"abstract":"<div>Low-temperature latent heat storage based on solid–liquid phase change materials (PCMs) is an effective energy saving technology. However, the problems of low thermal conductivity and liquid leakage exist, so effective encapsulation and enhanced heat transfer are the focus of current research. In this study, paraffin RT58 was selected as PCM and HDPE were selected as encapsulation materials. Three PCM/HDPE composites with different proportions were prepared by melt-blending method and their encapsulation effect was tested. According to the results, 80wt%paraffin/20wt%HDPE composite was used for the subsequent experiments. EG was used to construct a heat-conducting skeleton inside the composite. The effects of EG content on thermal properties, density, leakage rate, and heat storage/release rate of the composites were investigated. The results show that the melting temperature and solidification temperature of the composites decrease with the increase of EG content. Furthermore, the addition of EG greatly reduces the leakage of composite by at least 2/3. The heat storage and release rate of the composite is accelerated with the increase of EG. The content of EG should be optimized by comprehensively considering its effects on the heat storage/release rate, heat storage density, bulk density, and encapsulation effect of the composite.</div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 4","pages":"923 - 934"},"PeriodicalIF":2.9,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bimetallic Phosphide-Sulfide Nanoparticles Embedded in S-Doped Three-Dimensional Porous Carbon as Efficient Electrocatalysts for OER

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2025-02-20 DOI: 10.1007/s11814-024-00371-3

Yuhong Zhang, Tianrui Yu, Jiaqi Zhou, Da Li, Mingxin Feng, Zewu Zhang, Qingzhao Yao, Yuming Zhou

{"title":"Bimetallic Phosphide-Sulfide Nanoparticles Embedded in S-Doped Three-Dimensional Porous Carbon as Efficient Electrocatalysts for OER","authors":"Yuhong Zhang, Tianrui Yu, Jiaqi Zhou, Da Li, Mingxin Feng, Zewu Zhang, Qingzhao Yao, Yuming Zhou","doi":"10.1007/s11814-024-00371-3","DOIUrl":"10.1007/s11814-024-00371-3","url":null,"abstract":"<div>Porous carbon has been extensively employed as a support for phosphide and sulfide nanoparticles to develop efficient and low-cost oxygen evolution reaction (OER) catalysts, owing to its superior electrical conductivity. This paper utilizes a cation exchange process in which the cations in the cation exchange resin (CER) are readily replaced by transition metal ions. Moreover, utilizing the inherent carbon-rich and sulfur-rich characteristics of CER, carbonization and phosphidation treatments were performed. The study successfully synthesizes a novel bimetallic phosphide-sulfide nanoparticle embedded in S-doped three-dimensional porous carbon electrocatalyst, NiCoPS@SC. The electrocatalyst exhibits exceptional catalytic performance in the OER: a low overpotential (329 mV) at 10 mA cm−2 current density, a Tafel slope of 87.0 mV dec−1, and a charge transfer resistance (2.47 Ω). The improved activity of NiCoPS@SC is attributed to the distinctive three-dimensional porous structure of the carbon nanomaterials and excellent electrical conductivity, which significantly increase the specific surface area (228.82 m2 g−1) and the density of active sites. Furthermore, the synergistic interaction between transition metal phosphide and sulfide nanoparticles, in conjunction with the strong integration with carbon nanostructures, improves interfacial interactions. This reduces metal particle agglomeration and erosion, thus enhancing catalytic performance while ensuring the structural stability and durability of the electrocatalyst. This three-dimensional porous transition bimetallic phosphide-sulfide carbon nanostructure offers a novel approach for developing practical transition metal OER catalysts.</div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 4","pages":"857 - 866"},"PeriodicalIF":2.9,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Isotherm, Kinetic, and Thermodynamic Studies for Negative Pressure Cavitation Adsorption of Paclitaxel from Culture Supernatants of Taxus chinensis onto Diaion HP-20

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2025-02-14 DOI: 10.1007/s11814-025-00414-3

Sangmin Yun, Jin-Hyun Kim

{"title":"Isotherm, Kinetic, and Thermodynamic Studies for Negative Pressure Cavitation Adsorption of Paclitaxel from Culture Supernatants of Taxus chinensis onto Diaion HP-20","authors":"Sangmin Yun, Jin-Hyun Kim","doi":"10.1007/s11814-025-00414-3","DOIUrl":"10.1007/s11814-025-00414-3","url":null,"abstract":"<div>In this study, a negative pressure cavitation adsorption method was developed to efficiently recover paclitaxel from Taxus chinensis culture supernatants using Diaion HP-20 as an adsorbent. The equilibrium adsorption data were applied to Langmuir, Freundlich, Dubinin–Radushkevich, and Elovich isotherms, and the Langmuir isotherm was found to be the most feasible. The kinetic data were in good agreement with the pseudo-second-order model, and intraparticle diffusion played a dominant role in the adsorption rate of paclitaxel according to the intraparticle diffusion model. The time for the adsorption to reach equilibrium was shortened by more than eight times at all negative pressures (− 50 to − 200 mmHg) compared to the conventional adsorption. In addition, as the negative pressure increased, the maximum adsorption capacity, adsorption rate constant, intraparticle diffusion rate constant, and intraparticle diffusion coefficient increased. The values of the thermodynamic parameters indicated that the adsorption was endothermic and spontaneous. As the negative pressure intensity increased at a given adsorption capacity (qe = 60–100 mg/g), the isosteric heat of adsorption decreased and the adsorbent surface became more energetically homogeneous.</div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 4","pages":"827 - 841"},"PeriodicalIF":2.9,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent Advances in Perovskite-Based Heterojunction Photocatalysts: Synthesis, Properties, and Applications

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2025-02-12 DOI: 10.1007/s11814-025-00416-1

A. Baray-Calderón, J. L. Aleman-Ramirez, Evelyn B. Díaz-Cruz, Claudia Martinez-Alonso, M. Fuentes-Pérez, H. Olvera-Vargas, Dulce K. Becerra-Paniagua

{"title":"Recent Advances in Perovskite-Based Heterojunction Photocatalysts: Synthesis, Properties, and Applications","authors":"A. Baray-Calderón, J. L. Aleman-Ramirez, Evelyn B. Díaz-Cruz, Claudia Martinez-Alonso, M. Fuentes-Pérez, H. Olvera-Vargas, Dulce K. Becerra-Paniagua","doi":"10.1007/s11814-025-00416-1","DOIUrl":"10.1007/s11814-025-00416-1","url":null,"abstract":"<div>Photocatalysis has attracted increasing scientific interest since it represents a promising path to combat the growing energy crisis and environmental pollution problems. Among the various materials used in photocatalysis, perovskites have become ideal photocatalysts due to their superior optoelectronic, morphologic, and physicochemical properties. However, pristine perovskites still have issues, such as weak stability, limited carrier extraction, and restricted active sites. Therefore, various strategies have been developed to improve the photocatalytic activity of pure perovskites in combination with other materials to form more efficient heterojunction composites. This review paper aims to report on the latest advances in the development, characterization, and photocatalytic efficiency of perovskite-based heterojunction composites coupled with binary and ternary semiconductors, carbon materials, metal oxides, and sulfides. The photocatalytic processes covered in this work are CO2 reduction, H2 generation, and the degradation of organic pollutants. This study is expected to intensify research on the development of perovskite-based composites and their future application to obtain chemicals of industrial interest, biofuels, and clean water with perspective at pilot and industrial scale.</div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 4","pages":"803 - 826"},"PeriodicalIF":2.9,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11814-025-00416-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Silanol-Enhanced Dehydrogenation of Ammonia Borane with Silicic Acid Catalyst

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2025-01-27 DOI: 10.1007/s11814-025-00400-9

Hosun Aum, Jeewoo Kim, Hyungu Kang, Kyungdon Baik, Jihoon Jung

{"title":"Silanol-Enhanced Dehydrogenation of Ammonia Borane with Silicic Acid Catalyst","authors":"Hosun Aum, Jeewoo Kim, Hyungu Kang, Kyungdon Baik, Jihoon Jung","doi":"10.1007/s11814-025-00400-9","DOIUrl":"10.1007/s11814-025-00400-9","url":null,"abstract":"<div>Ammonia borane (AB), with a 19.6-wt% H2 content, is a promising hydrogen storage material for polymer electrolyte membrane fuel cells (PEMFC). However, traditional thermal decomposition of boric acid generates ammonia, which is detrimental to fuel cells. This study explores the use of silicic acid (SA) as a catalyst for AB, yielding 12.0 wt% of H2 at approximately 100 °C, making it suitable for fuel-cell operation. Notably, when the AB mass ratio is increased to 90 wt%, the reaction temperature increases slightly, yet it produces up to 12.3 wt% of H2. Fourier transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS) analyses confirm that SA contains more silanol groups than SiO₂. Pyridine infrared analysis reveals that SA has a higher distribution of Lewis acid sites, which play a vital role in the dehydrogenation of AB. In addition, when in-situ mass spectrometry analysis is performed, ammonia is not detected, indicating that no filtration is required for fuel-cell applications. In conclusion, this study demonstrates that SA enhances the dehydrogenation of AB at low temperatures, achieving a high H2 yield without ammonia production. This makes SA a promising catalyst for efficient and safe H2 storage in fuel cells, with potential applications in mobile and aerial vehicles.</div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 3","pages":"679 - 687"},"PeriodicalIF":2.9,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Jackfruit (Artocarpus heterophyllus) Seeds as Effective Heterogeneous Catalyst For Biodiesel Synthesis from Soybean Oil

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2025-01-22 DOI: 10.1007/s11814-025-00383-7

Dulu Brahma, Riu Riu Wary, Biswajit Nath, Maqsuma Banoo, Sanjay Basumatary, Ujjal K. Gautam, Manasi Buzar Baruah, Pranjal Kalita

{"title":"Jackfruit (Artocarpus heterophyllus) Seeds as Effective Heterogeneous Catalyst For Biodiesel Synthesis from Soybean Oil","authors":"Dulu Brahma, Riu Riu Wary, Biswajit Nath, Maqsuma Banoo, Sanjay Basumatary, Ujjal K. Gautam, Manasi Buzar Baruah, Pranjal Kalita","doi":"10.1007/s11814-025-00383-7","DOIUrl":"10.1007/s11814-025-00383-7","url":null,"abstract":"<div>Here, we demonstrate the utilization of calcined jackfruit seeds as highly efficient heterogeneous base catalysts (JSC-400 and JSC-600) for biodiesel synthesis from soybean oil. Catalysts were characterized by PXRD, FTIR, ({text{N}}_{2})-adsorption, SEM–EDX, FETEM, XPS, Hammett and CO2-TPD techniques. PXRD and FETEM analysis confirmed the presence of mixed metals in their oxide and carbonate forms, and their polycrystalline structures, respectively. FESEM and ({text{N}}_{2})-adsorption revealed the spongy, flake-like morphology and mesoporous structure of the catalysts. The concentration of potassium (K) in JSC-400, which is responsible for its basicity, was evaluated using EDX (12.40 atomic%) and XPS (13.87 atomic%). JSC-400 showed a more promising biodiesel yield (97.7%) in 30 min, which might be due to the higher basicities of JSC-400 with 11.51, 0.42 mmol/g and 1.997 mmol/g than JSC-600 (11.51, 0.42 mmol/g and 1.997 mmol/g) as measured by pH, Hammett and TPD-CO2 techniques, respectively. Three times consecutive recycle study of JSC-400, showed no significant loss in yield (95.2%), compared to fresh catalyst (97.7%). Thermodynamic and kinetic studies confirmed the non-spontaneous and pseudo-first order reaction, respectively. Product was confirmed by FTIR, 1H and 13C NMR and GC–MS techniques, and fuel properties were found to be comparable with the literatures and international standards.</div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 3","pages":"577 - 594"},"PeriodicalIF":2.9,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spent Lithium-Ion Battery Recycling: Multi-stage Synergistic Deep Removal of Impurities and Lithium Extraction

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2025-01-21 DOI: 10.1007/s11814-025-00382-8

Wen-bo Lou, Dong-yan Liu, Yun Wang, Da Zhao, Zi-cheng Sun, Yi Zou, Sheng-yan Wang, Quan-guo Cheng, Jian-zhong Li, Hong-hui Liu

{"title":"Spent Lithium-Ion Battery Recycling: Multi-stage Synergistic Deep Removal of Impurities and Lithium Extraction","authors":"Wen-bo Lou, Dong-yan Liu, Yun Wang, Da Zhao, Zi-cheng Sun, Yi Zou, Sheng-yan Wang, Quan-guo Cheng, Jian-zhong Li, Hong-hui Liu","doi":"10.1007/s11814-025-00382-8","DOIUrl":"10.1007/s11814-025-00382-8","url":null,"abstract":"<div>Nowadays, the recycling of spent lithium-ion batteries is a key concern in the energy field. Among them, for the purification of Li-containing mother liquor, the targeted multi-means coupling impurity removal methods are mostly employed, which however, inevitably lead to a Li loss of 3–5% and high costs. In this study, a multi-stage hydrolysis method, combining the residual P and Al, Mg, Cu, Zn, Ni, Fe, forming hydroxide-phosphate co-precipitation for the synergistic impurity separation, was adopted. Thermodynamic calculations show that Li+ and Mg2+ are insensitive to pH when pH < 10, and Al, Cu, Zn, Ni, Fe behave similarly in nature. The impurities should be precipitated as: Fe3+ > Al3+ > Cu2+ > Ni2+ > Zn2+ > Mg2+, with phosphate precipitating first, followed by converting into hydroxide as pH rising. Actual results showed that the order was P > Fe & Al & Cu & Ni & Zn > Mg, and the process was divided into three steps, with separation points at pH = 2.37, 8.66, and 11.00, respectively. All the impurity removal efficiencies were close to 100%, the loss of Li was 1.74%. The optimal conditions for Li2CO3 precipitation were determined: an Na2CO3 addition of 1.5 times the theoretical amount, a temperature of 90 °C, a reaction time of 4 h, and a one-time addition of dosing method. Li precipitation efficiency reaches 90.10%, with a 99.95% purity. The results effectively reduced Li losses and provided a practically feasible basis for the industrial purification of Li-containing mother liquor.</div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 3","pages":"621 - 632"},"PeriodicalIF":2.9,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0