Development of a novel electrolytic process for producing high-purity magnesium metal from magnesium oxide using a liquid tin cathode
The current electrolytic processes for magnesium (Mg) metal have several disadvantages, such as anhydrous magnesium chloride (MgCl2) preparation and generation of harmful chlorine (Cl2) gas. To overcome these drawbacks, a novel Mg production process to produce high-purity Mg metal directly from magn...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2021-09-01
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| Series: | Journal of Magnesium and Alloys |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956721000220 |
| _version_ | 1797204287429804032 |
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| author | Tae-Hyuk Lee Toru H. Okabe Jin-Young Lee Young Min Kim Jungshin Kang |
| author_facet | Tae-Hyuk Lee Toru H. Okabe Jin-Young Lee Young Min Kim Jungshin Kang |
| author_sort | Tae-Hyuk Lee |
| collection | DOAJ |
| description | The current electrolytic processes for magnesium (Mg) metal have several disadvantages, such as anhydrous magnesium chloride (MgCl2) preparation and generation of harmful chlorine (Cl2) gas. To overcome these drawbacks, a novel Mg production process to produce high-purity Mg metal directly from magnesium oxide (MgO) was investigated in this study. The electrolysis of MgO was conducted using a liquid tin (Sn) cathode and a carbon (C) anode in the eutectic composition of a magnesium fluoride (MgF2) – lithium fluoride (LiF) molten salt under an applied voltage of 2.5 V at 1053 – 1113 K. Under certain conditions, the Mg – Sn alloys with Mg2Sn and Mg (Sn) phases were obtained with a current efficiency of 86.6 % at 1053 K. To produce high-purity Mg metal from the Mg – Sn alloy, vacuum distillation was conducted at 1200 – 1300 K for a duration of 5 – 10 h. Following the vacuum distillation, the concentration of Mg in the Mg – Sn alloy feed decreased from 34.1 to 0.17 mass%, and Mg metal with a purity of 99.999 % was obtained at 1200 K. Therefore, the electrolytic process developed here is feasible for the production of high-purity Mg metal from MgO using an efficient method. |
| first_indexed | 2024-04-24T08:32:50Z |
| format | Article |
| id | doaj.art-dcea48b4b85943c3b9fc51a94ad06a45 |
| institution | Directory Open Access Journal |
| issn | 2213-9567 |
| language | English |
| last_indexed | 2024-04-24T08:32:50Z |
| publishDate | 2021-09-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj.art-dcea48b4b85943c3b9fc51a94ad06a452024-04-16T19:04:23ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672021-09-019516441655Development of a novel electrolytic process for producing high-purity magnesium metal from magnesium oxide using a liquid tin cathodeTae-Hyuk Lee0Toru H. Okabe1Jin-Young Lee2Young Min Kim3Jungshin Kang4Korea Institute of Geoscience and Mineral Resources, 124 Gwahak-ro Yuseong-gu, Daejeon 34132, Republic of KoreaInstitute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, JapanKorea Institute of Geoscience and Mineral Resources, 124 Gwahak-ro Yuseong-gu, Daejeon 34132, Republic of Korea; University of Science and Technology, 217 Gajeong-ro Yuseong-gu, Daejeon 34113, Republic of KoreaUniversity of Science and Technology, 217 Gajeong-ro Yuseong-gu, Daejeon 34113, Republic of Korea; Korea Institute of Materials Science, 797 Changwondae-ro, Seongsan-gu, Changwon, Gyeongnam, 51508, Republic of KoreaKorea Institute of Geoscience and Mineral Resources, 124 Gwahak-ro Yuseong-gu, Daejeon 34132, Republic of Korea; University of Science and Technology, 217 Gajeong-ro Yuseong-gu, Daejeon 34113, Republic of Korea; Corresponding author at: Korea Institute of Geoscience and Mineral Resources, 124 Gwahak-ro Yuseong-gu, Daejeon 34132, South Korea.The current electrolytic processes for magnesium (Mg) metal have several disadvantages, such as anhydrous magnesium chloride (MgCl2) preparation and generation of harmful chlorine (Cl2) gas. To overcome these drawbacks, a novel Mg production process to produce high-purity Mg metal directly from magnesium oxide (MgO) was investigated in this study. The electrolysis of MgO was conducted using a liquid tin (Sn) cathode and a carbon (C) anode in the eutectic composition of a magnesium fluoride (MgF2) – lithium fluoride (LiF) molten salt under an applied voltage of 2.5 V at 1053 – 1113 K. Under certain conditions, the Mg – Sn alloys with Mg2Sn and Mg (Sn) phases were obtained with a current efficiency of 86.6 % at 1053 K. To produce high-purity Mg metal from the Mg – Sn alloy, vacuum distillation was conducted at 1200 – 1300 K for a duration of 5 – 10 h. Following the vacuum distillation, the concentration of Mg in the Mg – Sn alloy feed decreased from 34.1 to 0.17 mass%, and Mg metal with a purity of 99.999 % was obtained at 1200 K. Therefore, the electrolytic process developed here is feasible for the production of high-purity Mg metal from MgO using an efficient method.http://www.sciencedirect.com/science/article/pii/S2213956721000220MagnesiumMagnesium oxideElectrolytic processLiquid tin cathodeVacuum distillation |
| spellingShingle | Tae-Hyuk Lee Toru H. Okabe Jin-Young Lee Young Min Kim Jungshin Kang Development of a novel electrolytic process for producing high-purity magnesium metal from magnesium oxide using a liquid tin cathode Journal of Magnesium and Alloys Magnesium Magnesium oxide Electrolytic process Liquid tin cathode Vacuum distillation |
| title | Development of a novel electrolytic process for producing high-purity magnesium metal from magnesium oxide using a liquid tin cathode |
| title_full | Development of a novel electrolytic process for producing high-purity magnesium metal from magnesium oxide using a liquid tin cathode |
| title_fullStr | Development of a novel electrolytic process for producing high-purity magnesium metal from magnesium oxide using a liquid tin cathode |
| title_full_unstemmed | Development of a novel electrolytic process for producing high-purity magnesium metal from magnesium oxide using a liquid tin cathode |
| title_short | Development of a novel electrolytic process for producing high-purity magnesium metal from magnesium oxide using a liquid tin cathode |
| title_sort | development of a novel electrolytic process for producing high purity magnesium metal from magnesium oxide using a liquid tin cathode |
| topic | Magnesium Magnesium oxide Electrolytic process Liquid tin cathode Vacuum distillation |
| url | http://www.sciencedirect.com/science/article/pii/S2213956721000220 |
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