Abstract
A solvent extraction process is described for defluorination and desulfation of filter phosphoric acids with high Al content. The solvent used contain an amine and phosphoric acid as main constituents. The acid obtained is compatible with feed-grade requirements. It can be concentrated to 56-60% PgOcby multiple effect evaporation, decreasing steam requirements by 50%. If an acid-base couple solvent is used in this process, part of the extracted phosphate can be recovered by back-wash with water in the form of highly purified phosphoric acid low in metals, fluorine and sulfate. The remainder of the acid along with the extracted sulfate is obtained as ammonium salt. The extracted F is converted into crystaline alkali fluorosilicate.
| Original language | English |
|---|---|
| Pages (from-to) | 677-697 |
| Number of pages | 21 |
| Journal | Solvent Extraction and Ion Exchange |
| Volume | 2 |
| Issue number | 4-5 |
| DOIs | |
| State | Published - 1 Jul 1984 |
Fingerprint
Dive into the research topics of 'A process for defluorination and purification of wet process phosphoric acids containing high AI concentrations'. Together they form a unique fingerprint.Cite this
- APA
- Author
- BIBTEX
- Harvard
- Standard
- RIS
- Vancouver