Medium-volatile impurity distribution in purification of terbium metal by vacuum distillation
| Autor: | Shi-ying Chen, Xi-ping Zhou, Zong-an Li, Lin Zheng, Ling-sheng Ke, Zhiqiang Wang, Zhang Xiaowei, Lei Zhang, De-Hong Chen, Zhou Lin |
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| Rok vydání: | 2021 |
| Předmět: |
Range (particle radiation)
Materials science Vacuum distillation Similar distribution Analytical chemistry chemistry.chemical_element Filtration and Separation Terbium 02 engineering and technology 021001 nanoscience & nanotechnology Analytical Chemistry law.invention Metal 020401 chemical engineering chemistry Impurity law visual_art Scientific method visual_art.visual_art_medium Condensed Matter::Strongly Correlated Electrons 0204 chemical engineering 0210 nano-technology Distillation |
| Zdroj: | Separation and Purification Technology. 266:118566 |
| ISSN: | 1383-5866 |
| DOI: | 10.1016/j.seppur.2021.118566 |
| Popis: | Theoretical distributions of medium-volatile impurities in distillates of terbium(Tb) metal were discussed and analyzed, and theoretical distributions were verified by vacuum distillation purification experiments with the different distillation temperatures. The research results indicated that, Fe and Cu in Tb metal are medium-volatile impurities, the mass-transfer control steps of Fe and Cu impurities are the hybrid mass-transfer process, the effective separation coefficients of above impurities are in the range of 1～2, and distributions of above impurities in distillates present linearly decreasing tendency as the distillation proceeds; there are the similar distribution rules between the theoretically calculated results and experimental results, and the experimental results are less than the theoretically calculated results, which the average standard deviations of Fe impurity at 1790 °C, 1820 °C and 1850 °C are ±0.352, ±0.256 and ±0.284 respectively, and that of Cu impurity are ±0.327, ±0.356 and ±0.290 respectively; the experimental removal rates of Fe and Cu impurities are only in the range of 20～35%, indicating that the medium-volatile impurities of Fe and Cu in Tb metal can be hardly removed by vacuum distillation. |
| Databáze: | OpenAIRE |
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