摘要
初步探索了用液膜技术提取钽(Ⅴ)的条件,当料液相介质为H2 SO4 - HF体系,在乳膜与料液相的交界面上,萃取剂ROH以钅羊盐大阳离子形式与钽的HTaF7 -及TaF72- 形式结合,形成离子对而被萃取进入膜相.经试验,钽(Ⅴ)的萃取与〔H+ 〕有关而与〔F- 〕无关,只要选择适当的料液介质及载体,就能对钽(Ⅴ)
Methodologically,this article researches initially into how and on what conditions the method of extracting tantalum (Ⅴ) by using liquid faced membrane can be applied.When medium of liquid stuff being the system of H 2SO 4-HF,on the contacting surface between milky membrane and liquid stuff the extracting material ROH in the form of large cation of hydrous salt combines with tantalum (Ⅴ)that is in the form of HTaF 7 - and TaF 7 2- ,which leads to the formation of ionpair that is extracted into being membrane face.According to the test,the extraction of tantalum (Ⅴ) relates to [H +] but has nothing to do with [F -].As long as liquid medium and carrier selected are suitable,we can carry on tantalum (Ⅴ) extraction effectively.
