Production of High Purity Thorium Oxide from Complex Ores Leach Liquor

Autor:	Hasan Akçay, Ayşe Erdem, Akan Gülmez, Çiğdem Kara, Zümrüt Alkan, Haydar Güneş
Rok vydání:	2020
Předmět:	Extraction (chemistry) Radiochemistry Mühendislik Thorium chemistry.chemical_element Geology Thorium oxide Mineralogy Geotechnical Engineering and Engineering Geology solvent thorium Solvent Engineering leach liquor chemistry extraction Thorium Solvent Extraction Leach Liquor QE351-399.2
Zdroj:	Bulletin of the Mineral Research and Exploration, Vol 164, Iss 164, Pp 1-10 (2021) Volume: 164, Issue: 164 1-10 Bulletin of the Mineral Research and Exploration
ISSN:	0026-4563
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68e0d25e53ec003438a103c09c42bd71 https://doi.org/10.19111/bulletinofmre.709316 Zobrazit plný text záznamu