Separation of rare earth elements from sulfate leach liquor by heterocyclic nitrogen compound

作     者：GHADA M. Mahmoud NABIL T. El Hazek AHMAD M. Farag OMNEYA M. El Hussaini 

作者机构：Nuclear Materials Authority P.O. Box 530 El Maadi Cairo Egypt Chemistry department Faculty of Science Cairo University Giza Egypt 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2008年第26卷第4期

页      面：544-551页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Nuclear Materials Authority 

主　　题：triazolopyrimidine extraction stripping precipitation rare earths 

摘      要：Separation of rare earth dements by solvent extraction has actually been widely used in various fields from analytical chemistry to hydrometallurgy. A representative ore sample obtained from Kadabora Batholiths-Eastern Desert of Egypt, containing the multiple oxides rare earth minerals： Samarskite, Fergusonite, Betafite, and Pyrochlore, was subjected to sulfuric acid leaching. Different sets of equilibrium loading experiments were carded out on a bench scale for the extraction of rare earths （cerium and yttrium） from the sulfate leach liquor using 8,9-dihydro[1,2,4]triazolo[1,5-a]quinazolin-6（TH）-one {TQ} dissolved in methylene chloride. Stripping was carded out by 20% sodium hydroxide. A rare earth cake was produced by oxalic acid precipitation. Its purity reached 87.3%.