t-BAMBP/磺化煤油萃取体系从盐湖卤水中萃取铷的动力学研究

摘要

The extraction kinetics of rubidium from salt lake brine system with t-BAMBP has been investigated through Rising Drop Method.The influence of the interfacial area,concentration of the aqueous phase rubidium and concentration of oil phase (t-BAMBP/sulfonated kerosene) on the extraction rate were studied.By studying the effects of different interfacial areas on the extraction rate,it's indicated that the process of t-BAMBP extraction of rubidium by interfacial chemical reaction and phase chemical reaction in the joint control.The rate equation of extracting rubidium determined by non-slope analysis was R =9.936 × 10-7 [Rb +] 1.134 [t-BAMBP] 2.190.Extraction rate of reaction order of a =1.134,t-BAM-BP reaction order of b =2.190.The root mean square error of the experimental and calculated values of the extraction rate constants was 1.735％.%采用上升单液滴法,进行盐湖卤水中萃取铷的动力学研究,主要考察了比界面积、水相铷浓度和油相(t-BAMBP/磺化煤油)浓度对萃取速率的影响.通过比界面积的研究发现,t-BAMBP萃取铷的过程由界面化学反应和相内化学反应共同控制;通过对实验数据的非线性拟合,得到了萃取体系的动力学方程,R=9.936×10-7[Rb+]1.134[t-BAMBP]2.190,萃取速率对铷的反应级数为a=1.134,对t-BAMBP反应级数b=2.190,实验值和计算值的均方根误差为1.735％.