Extractive recovery of palladium(II) from hydrochloric acid solutions with Cyphos®IL 104
Extractive recovery of palladium(II) from hydrochloric acid solutions with Cyphos®IL 104
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DOI：
10.1016/j.hydromet.2011.12.006
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发表时间：
2012-02-01
期刊：
影响因子：
4.7
通讯作者：
Wisniewski, Maciej
中科院分区：
文献类型：
--
作者：
Cieszynska, Anna;Wisniewski, Maciej
研究了在甲苯存在下，使用季鏻盐：双-(2,4,4-三甲基戊基)次膦酸三己基(十四烷基)鏻 (Cyphos (R) IL 104) 作为一种新型试剂，从盐酸溶液中萃取回收钯(II)。萃取数据表明 Cyphos (R) lL 104 是一种非常高效且快速的萃取剂。 HCl 浓度的增加对萃取有负面影响，使用 Cyphos (R) IL 104 可分别从 0.1 和 3.0 M HCl 中有效萃取 96% 和 52% 的钯 (II) 离子。 5 分钟后，使用该鏻离子液体从 0.1 和 3.0 M HCl 水溶液中萃取钯 (II) 达到平衡。根据阴离子交换机制，使用 Cyphos IL 104 在界面处萃取钯 (II)。研究的最佳剥离溶液是 0.5 M NH4OH。还检验了在萃取-反萃过程的多个循环中重复使用 Cyphos (R) IL 104 的可行性。温度从 20 摄氏度升高到 70 摄氏度导致钯 (II) 萃取量的下降可以忽略不计。 Delta H 度、Delta S 度和 Delta G 度的计算值证明，使用 Cyphos (R) IL 104/甲苯混合物从 0.1 和 3.0 M HCl 溶液中萃取钯 (II) 都是放热反应。 (C) 2011 Elsevier B.V. 保留所有权利。
Extractive recovery of palladium(II) from a hydrochloric acid solution with quaternary phosphonium salt: trihexyl(tetradecyl)phosphonium bis-(2,4,4-trimethylpentyl)phosphinate (Cyphos (R) IL 104) as a novel reagent in the presence of toluene has been investigated. Extraction data indicate that Cyphos (R) lL 104 is a very efficient and fast extractant. The increase in HCl concentration has negative influence on the extraction and 96 and 52% of palladium(II) ions can be effectively extracted with Cyphos (R) IL 104 from 0.1 and 3.0 M HCl, respectively. The equilibrium of palladium(II) extraction from aqueous 0.1 and 3.0 M HCl with this phosphonium ionic liquid is achieved after 5 min. Extraction of palladium(II) with Cyphos IL 104 proceeds at the interface according to the anion-exchange mechanism. The best stripping solution from among the studied ones is 0.5 M NH4OH. The feasibility of reuse Cyphos (R) IL 104 in several cycles of extraction-stripping process was also examined. Increase in temperature from 20 to 70 degrees C causes a negligible decrease in the palladium(II) extraction. The calculated values of Delta H degrees, Delta S degrees and Delta G degrees evidence that the extraction of palladium(II) with Cyphos (R) IL 104/toluene mixture is an exothermic reaction both from 0.1 and 3.0 M HCl solutions. (C) 2011 Elsevier B.V. All rights reserved.