Extraction of Trivalent Rare Earth Ions with an Acidic Tridentate Extractant, 6-N,N-Di-n-Octylcarbamoyl-Pyridine-2-Carboxylic Acid
Year: 2022
Type: article
Abstract: Extraction properties of trivalent rare earth ions (RE(III)) from acidic chloride solutions with 6-N,N-di-n-octylcarbamoyl-pyridine-2-carboxylic acid (CPCA), which has three functional groups: an amide, a carboxylic acid and a pyridine, were investigated by slope analyses of the distribution ratio (D) of RE(III) and FT-IR measurements.The dependence of D on pH and CPCA concentration indicated that the 1:3 RE(III)-CPCA complex was predominantly formed in the organic phase.FT-IR analysis of the Dy(III) complex extracted with CPCA suggested that the coordination mode of CPCA to Dy(III) was tridentate.Plots of extraction percentage (E%) of RE(III) versus atomic number revealed that E% increased from La(III) to Er(III) and then remained almost constant until Lu(III).The E% of Y(III) was similar to that of Sm(III).
DOI: 10.15261/serdj.29.1
Authors: Hirokazu NARITA, Mikiya TANAKA
Language: English
Subfield: Inorganic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4213345404