| Autor: |
ERDEM, Ayşe, GÜNEŞ, Haydar, KARA, Çiğdem, AKÇAY, Hasan, GÜLMEZ, Akan, ALKAN, Zümrüt |
| Předmět: |
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| Zdroj: |
Bulletin of the Mineral Research & Exploration; 2021, Vol. 164 Issue 164, p1-10, 10p |
| Abstrakt: |
This paper investigates a method for separation and purification of thorium from leach liquors containing rare-earth elements (REE). Iron, which causes problems in the stage of thorium extracting, was first removed by using Adogen 464 solvent. Thorium was extracted with 30% D2EHPA-in kerosene with 1/3 organic/aqueous ratio and stoichiometry of the thorium-D2EHPA complex was calculated as 1:2.6 from slope analysis. After the extraction, LREE and HREE were scrubbed from the extracted organic with 0.25 M H2SO4 and 6 M HCl, respectively. Thorium oxalate was precipitated by oxalic acid and calcined at 1,050 °C. It was, after calcination, determined that purity of thorium oxide is 99.23%, based on the ICP-OES analysis. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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