METHOD OF SORPTION EXTRACTION OF RARE-EARTH ELEMENTS FROM PULPS

文件类型：PDF文档
文件大小：382K
FIELD : metallurgy. SUBSTANCE : invention refers to hydrometallurgy of rare metals, particularly to a method of rare-earth element (RRE) extraction from pulps and can be applied in technology of rare-earth element concentrate obtainment. Method of rare-earth element sorption extraction from pulps includes two stages. At the first stage, chelating subacid cation exchanger Cybber CRX 300 is used at pH 0.7-4.0 and phase contact duration of 1.0-3.0 hours. At the second stage, sulphonate cation exchanger Ambersep RE is used at pH 0.5-1.5 and phase contact duration of 0.5-1.0 hour. EFFECT : increased capacity and selectivity of cation exchangers and REE extraction degree, reduced duration of process. 1 tbl, 1 ex