聚苯乙烯基萃淋树脂的制备与性能

Preparation and Properties of AB-TP Extract Resin

为实现锂资源的高效环保提取,采用真空灌注法将磷酸三丁酯(TBP)-二(2-乙基己基)磷酸酯(P204)和聚苯乙烯基AB-8大孔树脂制备成AB-TP萃淋树脂,考察了萃取剂组分和大孔树脂类型对萃淋树脂制备及其对Li^(+)吸萃行为的影响,并使用扫描电子显微镜与傅里叶变换红外光谱对制备的萃淋树脂进行表征。实验结果表明:当萃取剂组分由80%TBP-20%P204+30 g/L Fe^(3+)组成时最利于萃淋树脂制备和Li^(+)的提取。当萃取剂与AB-8大孔树脂质量比为1∶1时,AB-TP萃淋树脂对模拟卤水中Li^(+)的平衡吸附量为1.2 mg/g。树脂吸萃Li^(+)行为的动力学分析表明AB-TP萃淋树脂对Li^(+)的吸萃符合二级动力学方程,也就是反应是由化学步骤控制。

In order to realize the efficient and environmentally friendly extraction of lithium resources,tributyl phosphate(TBP)-bis(2-ethylhexyl)phosphate(P204)and polystyryl AB-8 macroporous resin were prepared into AB-TP extract resin by vacuum perfusion,the effects of extractant components and macroporous resin types on the preparation of extract resin and their effects on Li^(+)extraction behavior were investigated,the prepared resin was characterized by scanning electron microscopy and Fourier diffuse reflection infrared.The experimental results show that when the extractant component is composed of 80%TBP-20%P204+30 g/L Fe^(3+),it is most conducive to the preparation of extract resin and the extraction of Li^(+).When the mass ratio between extractant and AB-8 macroporous resin is 1∶1,the equilibrium adsorption capacity of AB-TP extract resin for Li^(+)in simulated brine is 1.2 mg/g.The kinetic analysis of Li^(+)extraction behavior of the resin show that the absorption of lithium by AB-TP extract resin conform to the second-order kinetic equation,that is,the reaction is controlled by chemical steps.