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合成一种新型三叔胺萃取剂并对其萃取性能进行研究。以二乙烯三胺、溴代正己烷和溴代正辛烷为原料,合成N,N,N′,N″,N″-五烷基(己基,辛基)二乙烯三胺,分别用红外光谱、核磁共振氢谱对其进行表征。比较N,N,N′,N″,N″-五己基二乙烯三胺、N,N,N′,N″,N″-五辛基二乙烯三胺与N235的萃取性能,研究N,N,N′,N″,N″-五辛基二乙烯三胺的反萃性能。研究结果表明:N,N,N′,N″,N’’-五辛基二乙烯三胺萃取性能优于N,N,N′,N″,N″-五己基二乙烯三胺性能,而与N235性能类似;以2 mol/L NaOH作反萃剂,当反萃温度为25℃,振荡时间为5 min,油与水的体积比即相比(V(O)/V(A))为2:1时,单级反萃率达97.48%;水相中钼质量浓度最高可富集到55 g/L。
A novel tri-tertiary amine extractant was synthesized and its extraction performance was studied. Synthesis of N, N, N ’, N “, N”, N “- pentadecyl (hexyl, octyl) diethylenetriamine with diethylenetriamine, n - bromohexane and n - octylbromide as raw materials, Spectroscopy, proton nuclear magnetic resonance spectroscopy to characterize it. The extraction performance of N, N, N ’, N ”, N“ -pentamethyldiethylenetriamine and N, N, N’, N ” Stripping performance of N, N ’, N “, N” - pentadecyldiethylenetriamine. The results show that the extraction performance of N, N, N ’, N ", N’ ’- Pentaoctyl diethylenetriamine is better than that of N, N, N’ While the performance was similar to that of N235. When the stripping temperature was 25 ℃ and the shaking time was 5 min with 2 mol / L NaOH as stripping agent, the volume ratio of oil to water (V (O) / V (A) ) Was 2: 1, the single-stage stripping rate was 97.48%. The highest molybdenum concentration in aqueous phase was 55 g / L.