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研究了在不加络合剂条件下,在高钨低钼酸性体系中N263(氯化三烷基甲胺)萃取分离钨钼的性能,考察了单级分离过程中各因素对分离效果的影响,实验表明单级萃取分离钨钼效果较好,在料液含WO3浓度为60 g/L、Mo浓度为2.0 g/L,溶液pH=6,有机相中配比为15%N263+10%仲辛醇,相比O/A=1,振荡时间为10 min的条件下,βWO3/Mo的值为28.2。但钨钼交换分离性能差,随着交换次数的进行交换分离系数不断减小,甚至达到βWO3/Mo<1,导致串级萃取不能有效分离钨钼。因此不加络合剂条件下由胺类萃取剂N263深度分离钨钼至今仍未实现有效分离。
The effects of N263 (trialkyl methylammonium chloride) extraction and separation of tungsten and molybdenum in high tungsten and low molybdic acid system without complexing agent were studied. The effects of various factors on the separation efficiency were investigated. The results showed that the single-stage extraction and separation of tungsten and molybdenum were better. The concentration of WO3 in the feed solution was 60 g / L, the concentration of Mo was 2.0 g / L, the solution pH was 6, the ratio of organic solvent was 15% N263 + 10% Octanol, the value of βWO3 / Mo is 28.2 compared to O / A = 1 and the oscillation time is 10 min. However, the separation of tungsten and molybdenum exchange performance is poor, with the exchange number of exchange separation factor decreases, and even reached βWO3 / Mo <1, resulting in cascade extraction can not effectively separate tungsten and molybdenum. Therefore, without additional complexing agent by the amine extractant N263 depth separation of tungsten and molybdenum has not yet achieved effective separation.