摘要
利用改性的季铵盐萃取剂从高碱度溶液中进行萃取钒的研究.考察了萃取剂浓度、仲辛醇浓度、料液碱度、料液初始含钒浓度、相比、振荡时间及温度对钒萃取过程的影响,并绘制了钒萃取等温曲线.结果表明:在料液碱度为1.5 mol/L、料液初始V2O5浓度为3.57 g/L,相比O/A为2/1,萃取时间为10 min,萃取温度为30℃,有机相组成为(质量分数)50%CO32-型三-十八烷基甲基氯化铵+20%仲辛醇+30%磺化煤油的条件下,钒的单级萃取率可达80%,钒的饱和容量可达5.85 g/L;在此条件下,经过5级逆流萃取,萃余液中V2O5浓度可降为0.05 g/L以下,钒萃取率达到99.4%.
Solvent extraction of vanadium（V） from high alkaline solution using the modified quaternary ammonium salt as the extractant is studied. The effects of extractant concentration, DL-2-Octanol concentration, alkaline and vanadium concentration of feed, phase ratio, oscillation time and temperature on the extraction of vanadium are investigated. And the extraction distribution isotherm of vanadium is also plotted. Experimental results show that the single stage extraction rate of vanadium can reach 80 % and the saturated loading capacity for V2O5 can reach 5.85 g/L under the optimal conditions of alkaline of 1.5 mol/L,vanadium concentration of 3.57 g/L, phase ratio（O/A） of 2 ∶1, oscillation time of 8 min, room temperature, and the organic phase consists of 50 wt% Trioctadecyl Methyl Ammonium Chloride（CO32-type） ＋ 20 wt% DL-2-Octanol ＋ 30 wt% sulfonated kerosene. After five stages counter-current test, the extraction rate of vanadium can reach 99.4 % and the concentration of V2O5 left in the raffinate is less than 0.05 g/L.
出处
《有色金属科学与工程》
CAS
2015年第2期21-26,共6页
Nonferrous Metals Science and Engineering
基金
国家自然科学基金资助项目(51164012)
关键词
高碱性体系
改性季铵盐
溶剂萃取
钒萃取
high alkalescency system
modified quaternary ammonium sah
solvent extraction
vanadium
