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The process and mechanism for cesium and rubidium extraction with saponified 4-tert-butyl-2-(a-methylbenzyl) phenol

查看全文 作　　者：Dengke [1,2]Pang;Zhihong [1]Zhang;Yongquan [1]Zhou;Zhenhai [1]Fu;Quan [1]Li;Yongming [1,2]Zhang;Guangguo [1,2]Wang;Zhuanfang [1,2]Jing 高影响力作者 机构地区：[1]Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining 810008,China;[2]University of Chinese Academy of Sciences,Beijing 100049,China高影响力机构 出　　处：《Chinese Journal of Chemical Engineering》索引2022年第35卷第6期,共9页高影响力期刊 基　　金：The research is financially supported by the Science and Technology Department of Qinghai Province(2019-ZJ-7001);West Light Foundation of the Chinese Academy of Sciences(Y910041014);Youth Innovation Promotion Association,CAS(2017467);the Tibet A-Li La-Guo Resources Co.Ltd.,China. 摘　　要：Cesium(Cs)and rubidium(Rb)separation from brine is an important and application-oriented topic.4-tert-butyl-2-(a-methylbenzyl)phenol(t-BAMBP)has been used for Cs and Rb extraction.However,the traditional extraction technology is base and acid consumed.In the present work,an innovative process for Cs and Rb extraction with t-BAMBP is developed,which consists of saponification,extraction,scrubbing and stripping.Both infrared spectrum and electrostatic potential analysis indicate the hydrogen of phenolic hydroxyl is dissociated from t-BAMBP during saponification and the oxygen of phenolic hydroxyl is the binding site for alkali metal ions.Saponified organic phase shows an excellent extraction effect for Cs^(+)and Rb^(+).The extraction reaches equilibrium in 5 min,with 99.5%Cs^(+)and 46.7%Rb^(+)are loaded into the organic phase in the single-stage extraction.Slope method indicates the structure of the extraction complex is MOR·3ROH(M=Cs^(+),Rb^(+),K^(+)),where the electrostatic attraction between M^(+)and the oxygen of phenolic hydroxyl is dominant,and the cation–p interaction has a significant effect also.The extraction complex of MOR·3ROH dissociates in the acid environment while scrubbing and stripping is completed.The Cs^(+)and Rb^(+)are separated from the mixture phase,the proton H bonds to the phenolic hydroxyl group,and the extractant is regenerated. 关 键 词：t-BAMBP Optimization Separation Solvent extraction CESIUM RUBIDIUM
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