Solvent Extraction of Lanthanide Ions with a Diglycolamic Acid Extractant Based on D-Glucosamine

Abstract

2-Deoxy-2-carboxymethoxy-acetylamino-1,3,4,6-tetra-O-decanoyl-D-glucopyranose (C9GLNDGAA; RH) has been developed for the extraction of lanthanide ions from aqueous nitrate solution. The present extractant extracts lanthanide ions (M) by two types of extraction mechanism. The extracted species are determined to be MR₃(RH)₃ for the lighter ions from La³⁺ to Sm³⁺, and MR₂(RH)₂NO₃ for the heavier ions from Eu³⁺ to Yb³⁺. The extraction of lanthanide ions seems to be directly affected by the steric hindrance of the glucosamine framework.