应用[Omim][BF_4]为萃取剂分离钒铬渣酸浸液中钒/铬的研究

离子液体是一种新型绿色溶剂,在重金属离子萃取分离方面较传统的有机物质有显著的优势,但其成本昂贵是制约其作为溶剂应用的重要瓶颈,将其作为重要萃取剂是其扩大应用的一种有效途径。研究了1-辛基-3-甲基咪唑四氟硼酸盐离子液体(Omim]BF_4])萃取分离V(Ⅴ)、Cr(Ⅲ)的影响因素,包括相比(O/A)、时间、温度及金属离子初始质量浓度。结果表明,Omim]BF_4]对于钒铬渣酸浸液中的V(Ⅴ)具有较好的萃取选择性,而对于Cr(Ⅲ)的萃取能力较弱,可以用于钒铬分离,为钒铬渣的绿色资源化利用开辟了新的途径。

Separation of Vanadium and Chromium from Chrome Vanadium Slag Acid Dipping by Alkyl Imidazoles Ionic Liquid as Extractant

As a new type of green extractants,ionic liquid shows remarkable advantages in the extraction of heavy metal ions comparing with traditional organic ones.But its high cost hinders its application as solvent.It is an effective way to expand apply as vital extractant.The influence factors including phase ratio (O/A),time,temperature and initial concentration of metal ion on the extraction separation process of V (Ⅴ) and Cr (Ⅲ) using 1-octyl-3-methylimidazolium tetrafluoroethylene borate were investigated.The results showed that the ionic liquid had good extraction selectivity for V (Ⅴ) in chrome vanadium slag,but its extraction capacity for Cr(Ⅲ) was weak,so it could be used for the separation of vanadium and chromium.This paper presented a new approach of its green recycling application.