Extraction properties of diglycolamide for rare earth:Contribution of N-substituents  

作　　者：Xiujing Peng Miaomiao Zhang Jingjing Yin Heng Zhao Jianhui Su Yu Cui Xuchuan Jiang Guoxin Sun 

机构地区：[1]Institute for Smart Materials&Engineering,University of Jinan,Jinan,250022,China [2]School of Chemistry and Chemical Engineering,University of Jinan,Jinan,250022,China

出　　处：《Journal of Rare Earths》2025年第4期815-821,I0006,共8页稀土学报(英文版)

基　　金：supported by the Natural Science Foundation of Shandong Province (ZR2022QB067)。

摘　　要：A successful extraction process relies heavily on an excellent extractant structure.The theory of extractant structure and extraction performance is still insufficient to guide the design of new extractants,despite extensive research into extractants.However,diglycolamide extractants have demonstrated certain advantages in nuclear fuel reprocessing and rare earth extraction and separation.This paper focuses on the synthesis of 13 structurally serially changed extractants.There is a good connection between the extraction performance and the energy consumption of the carbonyl conformation torsion of the extractant with symmetrical straight-chain alkyl substituents.The extraction capacity of extractant decreases with the increase of alkyl chain length.The methyl substituent extractant shows higher extractability than the other.The steric effect of the alkyl chain with more than two carbons is not significantly different.The relationship between the structure and performance of extractants was systematically studied by the combination of theoretical calculations and experimental data to investigate the effects of symmetric,asymmetric and branched N-substituents on extraction performance.

关 键 词：N-substituents Structure and performance Diglycolamide extractants EXTRACTION Rare earths 

分 类 号：O621.1[理学—有机化学]