Cesium(Cs)and rubidium(Rb)separation from brine is an important and application-oriented topic.4-tert-butyl-2-(α-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,scrub-bing 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 hydro-xyl 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-n 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.

Dengke Pang;Zhihong Zhang;Yongquan Zhou;Zhenhai Fu;Quan Li;Yongming Zhang;Guangguo Wang;Zhuanfang Jing

Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining 810008,China;University of Chinese Academy of Sciences,Beijing 100049,China

中国化学工程学报（英文版）

[1]Dengke Pang;Zhihong Zhang;Yongquan Zhou;Zhenhai Fu;Quan Li;Yongming Zhang;Guangguo Wang;Zhuanfang Jing-.The process and mechanism for cesium and rubidium extraction with saponified 4-tert-butyl-2-(α-methylbenzyl)phenol)[J].中国化学工程学报（英文版）,2022(06):31-39

methylbenzyl,bing,xyl,Saponified,Cs+and,Rb+are,3ROH,M+and

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