The process and mechanism for cesium and rubidium extraction with saponified 4-<i>tert</i>-butyl-2-(<i>α</i>-methylbenzyl) phenol

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

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

Updated：2026-01-06

- The process and mechanism for cesium and rubidium extraction with saponified 4-tert-butyl-2-(α-methylbenzyl) phenol
- Chinese Journal of Chemical Engineering Vol. 46, Issue 6, Pages: 31-39(2022)
- Affiliations：
  
  1. Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences,Xining,China,810008
  2. University of Chinese Academy of Sciences,Beijing,China,100049
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2022
- Accepted：
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摘要

Abstract

Cesium (Cs) and rubidium (Rb) separation from brine is an important and application-oriented topic. 4-tert-butyl-2-(

-methylbenzyl) phenol (

-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

-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

-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

)

where the electrostatic attraction between M

and the oxygen of phenolic hydroxyl is dominant

and the cation–π 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 hydrox

yl group

and the extractant is regenerated.

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⁰

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

DOI：

摘要

Abstract

关键词

Keywords

references