THE STUDY OF USING CATION EXCHANGE FIBER TO PREPARE HIGH PURITY Er_2O_3

摘要

This paper studies the effect of ratio of column , EDTA concentration, and elution speed. On the separation result, using cation exchange fiber as an exchange material, Cu~(2+) as retarding agent and EDTA as displacer, for preparing the high purity Er_2O_3·Er_2O_3 with high purity (≥5N) was produced by optimizing these technological conditions.