聚合偶氮试剂萃取稀有金属离子的研究

报道利用高分子显色剂聚乙烯醇缩对甲酰基苯偶氮变色酸(简称PV*CApF)作萃取剂,在非有机溶剂萃取体系Tween80-Na2SO4-H2O中,实现了Y(Ⅲ)与La (Ⅲ )、Zr(Ⅳ)与Ti(Ⅳ)的定量分离,研究了影响萃取的各种因素及形成的络合物电性对萃取率的影响;并与相应的小分子试剂作比较,结果表明:采用高分子显色剂作萃取剂,比相应的小分子萃取剂更易获得高的萃取率和好的分离效果,而且萃取率不受被萃物结构和电性的影响,表现出比小分子显色剂更优越的萃取性能.

Study on extraction separation rare metal ions by using a polymeric azo reagent

Using PV·CAPF as extractant, the isolations of Y(Ⅲ) with La(Ⅲ) and Zr(Ⅳ) with Ti(Ⅳ) were achieved respectively in liquid-solide extraction system based on Tween 80-salt-H 2O without organic solvents.The extracting conditions especially the electric charges of the complexes were explored and compared with the small molecule extractants. The experimental results show that the extractant of PV·CApF is more better than that of small molecules in obtaining higher extracting yield and better isolation efficiency. And in the existence of the titled polymer extracting agent, the extracting yield isn't influenced by the structures and the electric charges of extractives. These indicate that the extracting agent of PV·CApF have more excellent extracting power than that of small molecules.