Jiawei Wang; Dehua Che; Wei Qin
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 t-BAMBP with rubidium is 4:1. The apparent extraction equilibrium constant of rubidium was calculated by fitting the experimental data.
刘世明; 刘和辉; 黄云敬; 阳卫军
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 NaOH 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.%将工厂提钾后的盐湖卤水作为提取Rb+和Cs+的实验用卤水，将萃取剂t-BAMBP的磺化煤油溶液作为有机相进行萃取。在萃取之前预先沉淀出镁并作为一种产品，在反萃前再多次洗涤分离出大部分的 K+和 Na+，最终使Rb+和Cs+得到有效富集和分离。研究油水相比(O/A)、水相的碱性(c(OH−)、K+和Mg2+的含量及洗涤油水相比(O/A′)对萃取过程的影响。最佳工艺条件为：1.0 mol/L的 t-BAMBP磺化煤油溶液，水相碱性c(OH−)=1 mol/L,油水相比O/A=1：1。当用1×10−4 mol/L NaOH溶液洗涤萃取油相3次，洗涤油水相比O/A′=1：0.5时，铷和铯的洗脱率仅为10.5%。经过5级逆流萃取，最终铷和铯的萃取率分别达到了95.04%与99.80%。
陈朝晖; 马颖; 姚建年
A novel high efficient photochromic self assembly multilayered film has been fabricat ed from WO3 and 1,10 DAD solution using molecular deposition technique.The dependence of photochromic behavior on aggregation of WO3 in the WO3 polymer/1,10 DAD self assembly film was discussed in comparison with WO3/ 4,4'-BAMBp system.The results clearly show that organic molecules determine the charge density of the substrate,then affect the assembled structure of inorganic precursor and the stablility of the photo induced charge transfer complexes,and thus manipulate the structure and the photochromic properties of the films.