Extraction of antimony and niobium with tributyl phosphate from fluoride-ammonium solutions
| Autor: | A. I. Nikolaev, L. A. Safonova, V. G. Maiorov, N. V. Mudruk, I. R. Elizarova |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
General Chemical Engineering
Extraction (chemistry) Inorganic chemistry Niobium chemistry.chemical_element One stage 02 engineering and technology General Chemistry 010402 general chemistry 01 natural sciences 0104 chemical sciences chemistry.chemical_compound 020401 chemical engineering Antimony chemistry Impurity Ammonium Tributyl phosphate 0204 chemical engineering Fluoride Nuclear chemistry |
| Zdroj: | Theoretical Foundations of Chemical Engineering. 50:781-784 |
| ISSN: | 1608-3431 0040-5795 |
| DOI: | 10.1134/s0040579516050158 |
| Popis: | The purification of niobium from antimony impurity via extraction with tributyl phosphate from solutions of the HF + NH4F mixture has been studied. It has been established that at an HF + NH4F content equal to 7–16 mol/L and an NH4F concentration of 30% in the mixture, Sb extraction hardly changes (70–80% for one stage), and Nb coextraction abruptly decreases to values of less than 0.5%. |
| Databáze: | OpenAIRE |
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