The Efficient Removal of Calcium and Magnesium Ions from Industrial Manganese Sulfate Solution through the Integrated Application of Concentrated Sulfuric Acid and Ethanol
In the process of preparing high-purity MnSO<sub>4</sub> from industrial MnSO<sub>4</sub> solution, it is difficult to remove Ca<sup>2+</sup> and Mg<sup>2+</sup> due to their closely similar properties. In this study, thermodynamic software simulation...
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MDPI AG
2021-08-01
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| Online Access: | https://www.mdpi.com/2075-4701/11/9/1339 |
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| author | Houyang Chen Kaituo Wang Xianquan Ming Feng Zhan Yaseen Muhammad Yuezhou Wei Weijian Li Haiqing Zhan |
| author_facet | Houyang Chen Kaituo Wang Xianquan Ming Feng Zhan Yaseen Muhammad Yuezhou Wei Weijian Li Haiqing Zhan |
| author_sort | Houyang Chen |
| collection | DOAJ |
| description | In the process of preparing high-purity MnSO<sub>4</sub> from industrial MnSO<sub>4</sub> solution, it is difficult to remove Ca<sup>2+</sup> and Mg<sup>2+</sup> due to their closely similar properties. In this study, thermodynamic software simulation and experimental procedures were combined to remove Ca<sup>2+</sup> and Mg<sup>2+</sup> from industrial MnSO<sub>4</sub> solution to obtain high-purity MnSO<sub>4</sub>. The simulation model was applied to predict the trend of the crystallization of different ions in the solution upon the addition of H<sub>2</sub>SO<sub>4</sub>, which revealed that, at a volume ratio of H<sub>2</sub>SO<sub>4</sub> to MnSO<sub>4</sub> solution of more than 0.2, MnSO<sub>4</sub> started to crystallize and precipitate. The experimental results further verified the simulation results, and the yield of MnSO<sub>4</sub> increased with the increasing ratio of H<sub>2</sub>SO<sub>4</sub>, while the removal rate of Ca<sup>2+</sup> and Mg<sup>2+</sup> decreased gradually. Keeping the economic aspect in mind, the 0.3 ratio of H<sub>2</sub>SO<sub>4</sub> was selected at which the yield of MnSO<sub>4</sub> reached 86.44%. The removal rate of Ca<sup>2+</sup> and Mg<sup>2+</sup> by recrystallization reached 99.68% and 99.17% respectively after six consecutive cycles. The recrystallized sample was washed twice with anhydrous ethanol (volume ratio of ethanol to MnSO<sub>4</sub> solution of 0.5) and dried for 6 h at 120 °C, and the purity of MnSO<sub>4</sub>·H<sub>2</sub>O reached the battery grade requirements with the final yield as high as 80.54%. This study provides important guideline information for the purification of MnSO<sub>4</sub>·H<sub>2</sub>O from industrial MnSO<sub>4</sub> solution via a cost-effective, simple and facile approach. |
| first_indexed | 2024-03-10T07:27:13Z |
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| id | doaj.art-9d6778df54a34729a231708d68caadf8 |
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| last_indexed | 2024-03-10T07:27:13Z |
| publishDate | 2021-08-01 |
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| spelling | doaj.art-9d6778df54a34729a231708d68caadf82023-11-22T14:12:28ZengMDPI AGMetals2075-47012021-08-01119133910.3390/met11091339The Efficient Removal of Calcium and Magnesium Ions from Industrial Manganese Sulfate Solution through the Integrated Application of Concentrated Sulfuric Acid and EthanolHouyang Chen0Kaituo Wang1Xianquan Ming2Feng Zhan3Yaseen Muhammad4Yuezhou Wei5Weijian Li6Haiqing Zhan7Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, ChinaGuangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, ChinaSouth Manganese Group Co., Ltd., Nanning 530004, ChinaSouth Manganese Group Co., Ltd., Nanning 530004, ChinaInstitute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa 25120, PakistanGuangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, ChinaSouth Manganese Group Co., Ltd., Nanning 530004, ChinaSouth Manganese Group Co., Ltd., Nanning 530004, ChinaIn the process of preparing high-purity MnSO<sub>4</sub> from industrial MnSO<sub>4</sub> solution, it is difficult to remove Ca<sup>2+</sup> and Mg<sup>2+</sup> due to their closely similar properties. In this study, thermodynamic software simulation and experimental procedures were combined to remove Ca<sup>2+</sup> and Mg<sup>2+</sup> from industrial MnSO<sub>4</sub> solution to obtain high-purity MnSO<sub>4</sub>. The simulation model was applied to predict the trend of the crystallization of different ions in the solution upon the addition of H<sub>2</sub>SO<sub>4</sub>, which revealed that, at a volume ratio of H<sub>2</sub>SO<sub>4</sub> to MnSO<sub>4</sub> solution of more than 0.2, MnSO<sub>4</sub> started to crystallize and precipitate. The experimental results further verified the simulation results, and the yield of MnSO<sub>4</sub> increased with the increasing ratio of H<sub>2</sub>SO<sub>4</sub>, while the removal rate of Ca<sup>2+</sup> and Mg<sup>2+</sup> decreased gradually. Keeping the economic aspect in mind, the 0.3 ratio of H<sub>2</sub>SO<sub>4</sub> was selected at which the yield of MnSO<sub>4</sub> reached 86.44%. The removal rate of Ca<sup>2+</sup> and Mg<sup>2+</sup> by recrystallization reached 99.68% and 99.17% respectively after six consecutive cycles. The recrystallized sample was washed twice with anhydrous ethanol (volume ratio of ethanol to MnSO<sub>4</sub> solution of 0.5) and dried for 6 h at 120 °C, and the purity of MnSO<sub>4</sub>·H<sub>2</sub>O reached the battery grade requirements with the final yield as high as 80.54%. This study provides important guideline information for the purification of MnSO<sub>4</sub>·H<sub>2</sub>O from industrial MnSO<sub>4</sub> solution via a cost-effective, simple and facile approach.https://www.mdpi.com/2075-4701/11/9/1339OLI Stream Analyzerhigh-purity MnSO<sub>4</sub>recrystallizationCa<sup>2+</sup> and Mg<sup>2+</sup> removal |
| spellingShingle | Houyang Chen Kaituo Wang Xianquan Ming Feng Zhan Yaseen Muhammad Yuezhou Wei Weijian Li Haiqing Zhan The Efficient Removal of Calcium and Magnesium Ions from Industrial Manganese Sulfate Solution through the Integrated Application of Concentrated Sulfuric Acid and Ethanol Metals OLI Stream Analyzer high-purity MnSO<sub>4</sub> recrystallization Ca<sup>2+</sup> and Mg<sup>2+</sup> removal |
| title | The Efficient Removal of Calcium and Magnesium Ions from Industrial Manganese Sulfate Solution through the Integrated Application of Concentrated Sulfuric Acid and Ethanol |
| title_full | The Efficient Removal of Calcium and Magnesium Ions from Industrial Manganese Sulfate Solution through the Integrated Application of Concentrated Sulfuric Acid and Ethanol |
| title_fullStr | The Efficient Removal of Calcium and Magnesium Ions from Industrial Manganese Sulfate Solution through the Integrated Application of Concentrated Sulfuric Acid and Ethanol |
| title_full_unstemmed | The Efficient Removal of Calcium and Magnesium Ions from Industrial Manganese Sulfate Solution through the Integrated Application of Concentrated Sulfuric Acid and Ethanol |
| title_short | The Efficient Removal of Calcium and Magnesium Ions from Industrial Manganese Sulfate Solution through the Integrated Application of Concentrated Sulfuric Acid and Ethanol |
| title_sort | efficient removal of calcium and magnesium ions from industrial manganese sulfate solution through the integrated application of concentrated sulfuric acid and ethanol |
| topic | OLI Stream Analyzer high-purity MnSO<sub>4</sub> recrystallization Ca<sup>2+</sup> and Mg<sup>2+</sup> removal |
| url | https://www.mdpi.com/2075-4701/11/9/1339 |
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