The residues of salt lake brine from which potassium had been removed were used to extract Rb＋ and Cs＋ together with a sulphonated kerosene（SK） solution of 1.0 mol/L 4-tert-butyl-2-（α-methylbenzyl） phenol（t-BA...The residues of salt lake brine from which potassium had been removed were used to extract Rb＋ and Cs＋ together with a sulphonated kerosene（SK） solution of 1.0 mol/L 4-tert-butyl-2-（α-methylbenzyl） phenol（t-BAMBP）. Rb＋ and Cs＋ were enriched and separated effectively by precipitating Mg2＋ before extraction and by scrubbing out K＋ and Na＋ repeatedly before stripping. The effects of the volume ratio of organic phase to aqueous extraction phase（O/A）, alkalinity of aqueous phase（c（OH）-）, interference from K＋ and Mg2＋, and ratio the volume of organic phase to aqueous scrubbing phase（O/A′） were investigated. The experimental brine was extracted optimally by 5-stage extraction with 1.0 mol/L t-BAMBP in SK, c（OH-）=1 mol/L, and O/A=1：1. The scrubbing yield of rubidium was only about 10.5% when the extraction solvent was washed 3 times with 1×10-4 mol/L Na OH at O/A′=1：0.5. After 5-stage countercurrent extraction, the final extraction yields of Rb＋ and Cs＋ reached 95.04% and 99.80%, respectively.展开更多
4-Tert-butyl-2-（α-methylbenzyl） phenol （t-BAMBP） was used in cyclohexane in the extraction of rubidium from brine sources containing lithium. The effect of t-BAMBP concentration and aqueous phase pH on the rubidi...4-Tert-butyl-2-（α-methylbenzyl） phenol （t-BAMBP） was used in cyclohexane in the extraction of rubidium from brine sources containing lithium. The effect of t-BAMBP concentration and aqueous phase pH on the rubidium and lithium extraction equilibrium was studied, t-BAMBP/cyclohexane was efficient and selective for rubidium extraction with optimal operating conditions being pH of 13.0 and initial t-BAMBP concentration of 1.0 mol.L-1. The stoichiometry of the complex of α-BAMBP with rubidium is 4：1. The apparent extraction equilibrium constant of rubidium was calculated by fitting the experimental data.展开更多
基金Project(20606008)supported by the National Natural Science Foundation of ChinaProject(11070210)supported by the Fundamental Research Funds for the Central Universities of China
文摘The residues of salt lake brine from which potassium had been removed were used to extract Rb＋ and Cs＋ together with a sulphonated kerosene（SK） solution of 1.0 mol/L 4-tert-butyl-2-（α-methylbenzyl） phenol（t-BAMBP）. Rb＋ and Cs＋ were enriched and separated effectively by precipitating Mg2＋ before extraction and by scrubbing out K＋ and Na＋ repeatedly before stripping. The effects of the volume ratio of organic phase to aqueous extraction phase（O/A）, alkalinity of aqueous phase（c（OH）-）, interference from K＋ and Mg2＋, and ratio the volume of organic phase to aqueous scrubbing phase（O/A′） were investigated. The experimental brine was extracted optimally by 5-stage extraction with 1.0 mol/L t-BAMBP in SK, c（OH-）=1 mol/L, and O/A=1：1. The scrubbing yield of rubidium was only about 10.5% when the extraction solvent was washed 3 times with 1×10-4 mol/L Na OH at O/A′=1：0.5. After 5-stage countercurrent extraction, the final extraction yields of Rb＋ and Cs＋ reached 95.04% and 99.80%, respectively.
基金Supported by the research fund for the Doctoral Program of Education Ministry of China(20120002110098)
文摘4-Tert-butyl-2-（α-methylbenzyl） phenol （t-BAMBP） was used in cyclohexane in the extraction of rubidium from brine sources containing lithium. The effect of t-BAMBP concentration and aqueous phase pH on the rubidium and lithium extraction equilibrium was studied, t-BAMBP/cyclohexane was efficient and selective for rubidium extraction with optimal operating conditions being pH of 13.0 and initial t-BAMBP concentration of 1.0 mol.L-1. The stoichiometry of the complex of α-BAMBP with rubidium is 4：1. The apparent extraction equilibrium constant of rubidium was calculated by fitting the experimental data.
