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- Title
Production of high purity thorium oxide from complex ores leach liquor.
- Authors
ERDEM, Ayşe; GÜNEŞ, Haydar; KARA, Çiğdem; AKÇAY, Hasan; GÜLMEZ, Akan; ALKAN, Zümrüt
- Abstract
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.
- Subjects
THORIUM dioxide; SEPARATION (Technology); CHEMICAL purification; OXALIC acid; CALCINATION (Heat treatment)
- Publication
Bulletin of the Mineral Research & Exploration, 2021, Vol 164, Issue 164, p1
- ISSN
0026-4563
- Publication type
Article
- DOI
10.19111/bulletinofmre.709316