摘要
采用P204从石煤酸性浸出液中萃取钒,考察了料液初始pH值、萃取剂浓度、相比、萃取级数对钒萃取率的影响。结果表明:溶液pH值升高对钒的萃取有利,但随溶液pH值增大,溶液中沉淀量增多,钒损失率增大,X射线衍射图分析结果表明沉淀的主要成分为Fe,SO42-,PO34-和NH4-的结晶物。萃取剂浓度或相比(O/A)的增大,钒萃取率升高;以含10%P204,5%TBP和85%磺化煤油的有机相做萃取剂,在相比为1∶1,溶液初始pH值2.48的条件下,钒的单级萃取率为76.7%,经6级逆流萃取,钒的萃取率达到94.2%。采用生石灰处理萃余废水,当溶液pH值大于7.3时,萃余废水得到有效净化,处理后的废水清澈透明,可返回循环使用。
The extraction of vanadium from acidic solution of stone coal using Di(2-ethylhexyl) phosphate(P204) was investigated.The effects of initial pH value,concentration of P204,and volume ratio of aqueous phase to organic phase on the extraction of vanadium were studied.The results demonstrated that vanadium extraction rate increased with the initial pH value of the solution rising,and the P204 concentration in the organic phase.But with the pH increasing of the solution,the amount of precipitates increased,it w...
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2010年第3期400-405,共6页
Chinese Journal of Rare Metals
基金
国家高技术研究发展计划(863计划)(2006AA06Z130)资助
云南省科技厅资助项目(2007GA010)
关键词
溶剂萃取
P204
石煤
五氧化二钒
solvent extraction
Di（2-ethylhexyl） phosphate（P204）
stone coal
V2O5
