Abstract This study addresses the extraction and recovery of vanadium(V) from synthetic and real leach solution of spent V2O5 catalyst using Cyphos IL 104. Vanadium(V) is extracted as [(R3R′P+)4H2V10O284−]org in Cyphos IL 104 and stripped from the loaded organic phase as VO2+ using HNO3 as a stripping agent. The extractant is recyclable up to several cycles and shows high loading capacity. Vanadium(V) was separated from aluminium(III), titanium(IV), chromium(III), manganese(II), iron(II)/(III), molybdenum(VI) and tungsten(VI) with good separation factors. Metals were leached from spent catalyst using alkaline leaching. McCabe-Thiele plots indicated two stages for both extraction and stripping at A/O and O/A = 3/1. Vanadium is finally recovered as V2O5 from the strip liquor and characterized by XRD, FE-SEM and EDX techniques.

中文翻译：

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使用 Cyphos IL 104 通过溶剂萃取从废催化剂的合成和实际浸出溶液中回收钒 (V)

摘要 本研究涉及使用 Cyphos IL 104 从废 V2O5 催化剂的合成和真实浸出溶液中提取和回收钒 (V)。钒 (V) 在 Cyphos IL 104 中以 [(R3R'P+)4H2V10O284-] org 提取，并且使用 HNO3 作为汽提剂从负载的有机相中以 VO2+ 的形式汽提。萃取剂最多可回收多次循环，并显示出高负载能力。钒(V)与铝(III)、钛(IV)、铬(III)、锰(II)、铁(II)/(III)、钼(VI)和钨(VI)分离，分离因子良好。使用碱浸法从废催化剂中浸出金属。McCabe-Thiele 图显示了在 A/O 和 O/A = 3/1 下萃取和汽提的两个阶段。钒最终从汽提液中以 V2O5 的形式回收，并通过 XRD、FE-SEM 和 EDX 技术进行表征。