| Autor: |
Borisov, V. A., Rozhkov, N. N., Ponyatova, S. S., Bogdanova, A. O., Adeeva, L. N., Krugley, A. O. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2019, Vol. 2141 Issue 1, p020025-1-020025-7, 7p |
| Abstrakt: |
One of the wastes from oil refining industry – the spent cracking catalyst (SCC) – contains 1-2 % of rare earth elements (REE), which makes it a promising source for REE recovery. The optimal conditions for the recovery of lanthanum compounds from the fluorinated model mixture of aluminum and lanthanum oxides by leaching with a KOH solution were found: temperature 57 °C, concentration of a KOH solution 20 %, and a 1.9-fold excess of KOH with respect to stoichiometry. The concentrate containing 9.1 % La and 1.5 % Ce was recovered under the optimal conditions from the residue after sublimation of fluorinated SCC. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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