Abstract A mixture of TBP and P507 was proposed for the separation of molybdenum (Mo) and tungsten (W) from iron (Fe) in a hydrochloric-phosphoric acid (HCl-H3PO4) solution that was obtained from the hydrochloric acid preleaching of low-grade scheelite. Various extractants with TBP were investigated, and P507 showed synergistic effects on Mo and W extraction and a strong antagonistic effect on Fe extraction. Then, the effects of various conditions on the separation of Mo and W from Fe with the mixture of TBP and P507 were investigated. Using 24% (v/v) TBP, 16% (v/v) P507 and 60% (v/v) kerosene as extractants, 90% Mo and 88% W were extracted with only 8% Fe co-extraction, and the separation factors of Mo/Fe and W/Fe were 153 and 118, respectively, through one-stage extraction under the following conditions: 1.7 mol/L H+, A/O ratio of 3:1, contact time of 10 min, and temperature of 15 °C. After two-stage batch continuous extraction, 99% Mo, 94% W and 10% Fe were extracted. By washing with 2 mol/L hydrochloric acid, most of the Fe and other impurities were removed with negligible losses of Mo and W. Upon stripping with 5 mol/L ammonia at a 1:1 organic-to-aqueous phase ratio, almost 100% of the Mo and W were recovered from the washed organic phase. Other impurities, such as P, Si, Ca, Al, and Mn, minimally affected the extraction of Mo and W.

中文翻译：

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使用 TBP 和 P507 溶剂萃取从盐酸-磷酸溶液中的铁中分离钼和钨

摘要 提出了一种 TBP 和 P507 的混合物，用于在盐酸-磷酸 (HCl-H3PO4) 溶液中从铁 (Fe) 中分离钼 (Mo) 和钨 (W)，该溶液是从低浓度的盐酸预浸中获得的。级白钨矿。研究了各种含 TBP 的萃取剂，P507 对 Mo 和 W 的萃取有协同作用，对 Fe 的萃取有很强的拮抗作用。然后，研究了各种条件对使用 TBP 和 P507 混合物从 Fe 中分离 Mo 和 W 的影响。使用 24% (v/v) TBP、16% (v/v) P507 和 60% (v/v) 煤油作为萃取剂，90% Mo 和 88% W 被萃取，仅 8% Fe 共萃取，并且Mo/Fe和W/Fe的分离因子分别为153和118，在以下条件下通过一级萃取：1.7 mol/L H+，A/O比3:1，接触时间为 10 分钟，温度为 15 °C。经过两阶段间歇连续萃取，萃取出99% Mo、94% W和10% Fe。通过用 2 mol/L 盐酸洗涤，大部分 Fe 和其他杂质被去除，Mo 和 W 损失可忽略不计。在以 1:1 的有机相与水相比用 5 mol/L 氨汽提后，几乎 100从洗涤的有机相中回收了 % 的 Mo 和 W。其他杂质，如 P、Si、Ca、Al 和 Mn，对 Mo 和 W 的提取影响最小。从洗涤过的有机相中回收了几乎 100% 的 Mo 和 W。其他杂质，如 P、Si、Ca、Al 和 Mn，对 Mo 和 W 的提取影响最小。从洗涤过的有机相中回收了几乎 100% 的 Mo 和 W。其他杂质，如 P、Si、Ca、Al 和 Mn，对 Mo 和 W 的提取影响最小。