从废钒催化剂酸浸液中萃取钒  

Solvent Extraction of Vanadium From Acidic Leaching Solution of Waste Catalyst

作　　者：郝喜才[1] 姬学亮[2] 

机构地区：[1]开封大学五年制专科部,河南开封475004 [2]开封大学化学工程学院,河南开封475004

出　　处：《湿法冶金》2014年第6期453-456,共4页Hydrometallurgy of China

摘　　要：研究了用TOA作萃取剂从废钒催化剂酸浸液中萃取钒,考察了各影响因素对钒萃取率的影响,确定了最佳萃取参数。试验结果表明:用10%TOA+4%癸醇+86%磺化煤油作萃取剂,在水相pH=2.5、有机相与水相体积比(Vo∶Va)=1∶3、萃取时间2.5min、静置时间5min条件下,钒的单级萃取率高达95.2%;用0.6mol/L Na2CO3溶液进行2级反萃取,钒的反萃取率在99%以上;反萃取液可直接沉淀钒,产品V2O5质量达到GB3283—1987冶金99级标准。萃余液可集中处理。该工艺简单,综合效益显著。Solvent extraction of vanadium from acidic leaching solution of waste catalyst containing vanadium using TOA as extractant was researched . The optimum process parameters were determined .The results show that using the 10% TOA ＋ 4% decanol＋ 86% sulfonated kerosene as extraction agent ,at the conditions of aqueous phase pH of 2 .5 ,the volume ratio between organic phase and aqueous phase of 1∶3 ,contact time of 2 .5 min ,holding time of 5 min ,single stage extraction of vanadium is up to 95 .2% .Using 0 .6 mol/L Na2 CO3 solution and be two stages back‐extraction ,the 99% of vanadium in organic phase was stripped .The stripping liquid can be directly precipitated vanadium .Calcining the precipitate can acquire V2 O5 product with GB3283 -1987 metallurgical grade 99 standard .The extraction raffinate is centralized processing .The process is simple and has remarkable comprehensive benefit .

关 键 词：废催化剂 酸浸液 钒 萃取 

分 类 号：TF841.3[冶金工程—有色金属冶金]