Please use this identifier to cite or link to this item:
Title: Thorium and uranium extraction from rare earth elements in monazite sulfuric acid liquor through solvent extraction
Title of periodic: Minerals Engineering Oxford
Authors: Amaral, Janúbia C.B.S.
Morais, Carlos Antônio de
Affiliation: Centro de Deenvolvimento da Tecnologia Nuclear/CDTN, Belo Horizonte, MG, Brasil
Centro de Desenvolvimento da Tecnologia Nuclear/CDTN, Belo Horizonte, MG, Brasil
Issue Date: 2010
Keywords: Thorium;uranium;monazites;solvent extraction;hydrometallurgy;optimization;extractive metallurgy
Abstract: This paper describes the process of extraction of thorium and uranium from the sulfuric liquor generated in the chemical monazite treatment through a solvent extraction technique. The influence of the extractant type and concentration, contact time between phases, type and concentration of the stripping solution and aqueous/organic volumetric ratio were investigated. The results indicated the possibility of extracting, simultaneously, thorium and uranium from a solvent containing a mixture of Primene JM-T and Alamine 336. The stripping was carried out with a hydrochloric acid solution. After selecting the best conditions for the process, a continuous experiment was carried out in a mixer-settler circuit using four stages in the extraction step, five stages of stripping and one stage of the solvent regeneration. A loaded stripping solution containing 29.3 g/L of ThO2 and 1.27 g/L of U3O8 was obtained.
Access: L
Appears in Collections:Artigo de periódico

Files in This Item:
File Description SizeFormat 
Art-04_Carlos_AMorais.pdf453.07 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.