| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Rare Metal Extraction & Processing
|
| Presentation Title |
New Insights on Titanium(IV) Speciation to Improve the Purification of Concentrated Phosphoric Acid |
| Author(s) |
Alexandre Chagnes, Lucas Mangold, Hubert Halleux, Gerard Cote |
| On-Site Speaker (Planned) |
Alexandre Chagnes |
| Abstract Scope |
The first step of phosphoric acid production consists in leaching phosphate-containing material (mainly from primary resources) with sulfuric acid. During this step, a wide range of metallic elements are also leached, leading to high concentrations of impurities in phosphoric acid. Solvent extraction is the suitable technology to reach a high extraction efficiency of phosphoric acid while minimizing impurities co-extraction. In the case of an extraction solvent containing a mixture of n-tributyl phosphate (TBP) and di-iso-propyl ether (DiPE), titanium(IV) is co-extracted with phosphoric acid. In order to reduce titaniul(IV) co-extraction, it is of great interest to understand the mechanisms involved at the liquid-liquide interface, which is controlled by the speciation. In this work, titanium(IV) speciation in 4-14 mol.L-1 phosphoric acid has been investigated by processing UV-Visible and 31P NMR spectral data by means of chemiometric tools combined with appropriate physico-chemical models. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Hydrometallurgy, Extraction and Processing, Titanium |