Extraction of Cesium and Rubidium with 4-tert-butyl-2-(α-methylbenzyl) phenol from Salt Lake Brine

【摘要】 This work shows the extraction of cesium（ Cs⁺） and rubidium（ Rb⁺） from salt lake brine containing potassium（ K⁺） and magnesium( Mg²⁺). The results show that 4-tert-butyl-2-（ α-methylbenzyl） phenol（ t-BAMBP） diluted in sulfonated kerosene（ SK） has an excellent extraction effect. Infrared spectroscopic studies indicate that polymerize to form the dimer in the t-BAMBP when Cs⁺or Rb⁺were extracted. The effects of K⁺,Mg²⁺,t-BAMBP concentration,the volume ratio of organic phase to aqueous phase（ O/A） and the alkalinity（ pH） of aqueous phase were investigated.The K⁺and Mg²⁺should be eliminated through precipitating before the extraction and separation of Cs⁺and Rb⁺. The optimum extraction conditions of the experimental brine were as follows: 0. 8 mol/L t-BAMBP diluted in SK,pH≥13,a phase ratio of 1: 1,and an extraction contact time of 2 min at room temperature. The optimal extraction yields of Cs⁺and Rb⁺were as high as 100% and 85. 8%,in addition,8. 76% of K⁺was co-extracted. Further work would increase the extraction yield and selectivity of Rb⁺and realize the efficient separation of Cs⁺and Rb⁺from brine.更多还原

【Abstract】 This work shows the extraction of cesium（ Cs⁺） and rubidium（ Rb⁺） from salt lake brine containing potassium（ K⁺） and magnesium( Mg²⁺). The results show that 4-tert-butyl-2-（ α-methylbenzyl） phenol（ t-BAMBP） diluted in sulfonated kerosene（ SK） has an excellent extraction effect. Infrared spectroscopic studies indicate that polymerize to form the dimer in the t-BAMBP when Cs⁺or Rb⁺were extracted. The effects of K⁺,Mg²⁺,t-BAMBP concentration,the volume ratio of organic phase to aqueous phase（ O/A） and the alkalinity（ pH） of aqueous phase were investigated.The K⁺and Mg²⁺should be eliminated through precipitating before the extraction and separation of Cs⁺and Rb⁺. The optimum extraction conditions of the experimental brine were as follows: 0. 8 mol/L t-BAMBP diluted in SK,pH≥13,a phase ratio of 1: 1,and an extraction contact time of 2 min at room temperature. The optimal extraction yields of Cs⁺and Rb⁺were as high as 100% and 85. 8%,in addition,8. 76% of K⁺was co-extracted. Further work would increase the extraction yield and selectivity of Rb⁺and realize the efficient separation of Cs⁺and Rb⁺from brine.更多还原