High extraction efficiency of N,N,N′,N′-tetracyclohexyldiglycolamide for Sr(Ⅱ):An experimental and crystal structure study  

作　　者：Xiujing Peng Ling Li Haiyin Yu Riming Hu Jianhui Su Miaomiao Zhang 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：《Chinese Journal of Chemical Engineering》2025年第1期1-9,共9页中国化学工程学报(英文版)

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

摘　　要：To improve the ability of diglycolamide extractants for the extraction of Sr(Ⅱ)from high-level waste liquid,N,N,N′,N′-tetracyclohexyldiglycolamide(TCHDGA)was proposed and studied to extract Sr(Ⅱ)from nitrate media.TCHDGA was prepared and characterized by 1H nuclear magnetic resonance spectroscopy(NMR),^(13)C NMR,and fourier transform infrared spectroscopy(FT-IR).Various factors affecting extraction were studied systematically.In just 20 s,the extraction rate can reach approximately 98.2%.The extraction capacity of cyclohexyl-substituted extractant TCHDGA is tens of times higher than that with linear or branched chain alkyl.The chemical structure of the complex has been demonstrated to be[Sr3TCHDGA]·(NO_(3))_(2),based on FT-IR,X-ray photoelectron spectroscopy(XPS),and crystal structure analysis.The crystal belongs to the monoclinic system,space group P21,and a strontium ion coordinates with nine oxygen atoms,all of which contribute from TCHDGA.The stripping rate can reach over 99%when using distilled water or 0.50 mol·L^(-1)oxalic acid as stripping agents.

关 键 词：STRONTIUM TCHDGA extractant EXTRACTION Crystal structure 

分 类 号：O62[理学—有机化学]