混合萃取剂双氧水络合萃取分离钨钼的初步研究

On Separating Molybdenum from Tungsten by Solvent Extraction with Mixed Extractant Using H_2O_2 as Complex Agent

以双氧水为络合剂,采用混合萃取剂进行了高钼钨酸铵工业料液络合萃取分离钨钼的初步试验研究。试验考察了振荡平衡时间、双氧水用量、水相平衡pH值、温度等因素对钨钼萃取分离的影响,绘制了钼的萃取等温线并探索了反萃取方法。研究结果表明,该萃取体系具有良好的萃钼能力和钨钼分离性能,混合萃取剂浓度为45%的有机相对钼的饱和萃取容量达9.2 g/L,单级萃取钼钨分离系数可达50以上,NaOH溶液能有效反萃负载有机相。

This paper studies the separation of molybdenum from tungsten by solvent extraction using the hydrogen peroxide as complex agent from ammonium tungstate solution containing high molybdenum.The effects of equilibrium time,the dosage of H2O2,equilibrium pH value of water phase,temperature on separation of Mo from WO3 are investigated.The extraction isothermal for Mo was plotted and stripping method was explored.The results indicate that,the extraction system has a favorable capability for molybdenum extraction and a good separation efficiency for molybdenum and tungsten.The saturated capacity of organic phase containing 45 % mixed extrantant for molybdenum is 9.2 g/L.The separation coefficient for molybdenum and tungsten can be more than 50.The loaded organic phase can be stripped easily with NaOH solution.