Dissolution behaviors of rare earth elements in phosphoric acid solutions
| Autor: | Liangshi Wang, Dali Cui, Xiaowei Huang, Zongyu Feng, Sheng-xi Wu, Longsheng Zhao, Lifeng Zhang, Jinshi Dong |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Phosphorus
Rare earth Inorganic chemistry Metals and Alloys Evaporation chemistry.chemical_element 02 engineering and technology Geotechnical Engineering and Engineering Geology Condensed Matter Physics 020501 mining & metallurgy Gibbs free energy chemistry.chemical_compound symbols.namesake 0205 materials engineering chemistry Materials Chemistry symbols Molecule Solubility Phosphoric acid Dissolution |
| Zdroj: | Transactions of Nonferrous Metals Society of China. 28:2375-2382 |
| ISSN: | 1003-6326 |
| DOI: | 10.1016/s1003-6326(18)64883-6 |
| Popis: | In order to provide practical fundamental data for rare-earth elements (REEs) recovery from phosphoric acid and to better understand REEs behavior during the phosphoric acid evaporation process, the solubilities of REEs in phosphoric acid with various concentrations of phosphorus at different temperatures were measured. A simple linear model between REEs solubility and phosphoric acid concentration is built and the experimental data are found to fit it very well (R2>0.94). Hydrogen-ion concentration is found to be the predominant factor controlling the solubility of REEs in phosphoric acid. In addition, the solubility of REEs in phosphoric acid is found to sharply decrease with increasing temperature, which can be attributed to the increase of the Gibbs energy of the REEPO4 dissolution reaction or the restraint of the disassociation of phosphoric acid molecules owing to the elevated temperature. |
| Databáze: | OpenAIRE |
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