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首页> 外文期刊>Separation and Purification Technology >Recovery palladium,gold and platinum from hydrochloric acid solution using 2-hydroxy-4-sec-octanoyl diphenyl-ketoxime
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Recovery palladium,gold and platinum from hydrochloric acid solution using 2-hydroxy-4-sec-octanoyl diphenyl-ketoxime

机译：使用2-羟基-4-仲辛酰基二苯基酮肟从盐酸溶液中回收钯，金和铂

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摘要

The selective extraction of Pd(II) over Au(III) and Pt(IV) as well as subsequently selective extraction of Au(III) over Pt(IV) from hydrochloric acid (HC1) solution were achieved by using 2-hydroxy-4-sec-octanoyl diphenyl-ketoxime diluted in kerosene as extractant.The typical composition of solution used for the present study contains Pd:5.95 g/L,Au:5.42 g/L and Pt:10.23 g/L.Pd(II) is extracted into organic phase quantitatively after three-stage counter-current extraction operation with extraction percentage >99.9% at pH 2.At a higher HC1 concentration (5 M),Au(III) is effectively extracted into organic phase from the resulting raffinate by four-stage counter-current extraction operation.On the other hand,stripping of Pd(II) from loaded organic phase needs high acid solution while the stripping of Au(III) can be achieved at pH 2.Four-stage stripping with 6 M HC1 at O:A=2:1 yielded >99.9% Pd(II) stripping efficiency and four stages stripping with 0.01 M HC1 at 0:A phase ratio of 2:1 performed >99.9% Au(III) stripping efficiency.The resulting solutions for each metal,after the corresponding process such as precipitation or reduction,can be used for yielding metal powder with the purity better than 99.99%.A complete process flow sheet for the separation and recovery of Pd(II),Au(III) and Pt(IV) is established based on the present investigation.
机译：通过使用2-羟基-4选择性地在Au（III）和Pt（IV）上萃取Pd（II）以及随后在Pt（IV）上从盐酸（HCl）溶液中选择性萃取Au（III）煤油中稀释的β-仲辛酰基二苯基酮肟作为萃取剂。本研究使用的典型溶液成分为Pd：5.95 g / L，Au：5.42 g / L和Pt：10.23 g / L.Pd（II）为在pH值为2的条件下，经过三级逆流萃取操作后，萃取率> 99.9％，定量萃取到有机相中。在较高的HC1浓度（5 M）下，Au（III）可以有效地从所得萃余液中萃取到有机相中，萃取量为4另一方面，从负载的有机相中萃取Pd（II）需要高酸溶液，而pH 2可以实现Au（III）的萃取。用6 M HCl进行四步萃取在O：A = 2：1时，Pd（II）的汽提效率> 99.9％，在0.01：HCl下以0：A的相比为2：1进行四个阶段的汽提所形成的Au（III）溶出效率> 99.9％。每种金属的溶液，经过相应的沉淀或还原等工艺后，可用于生产纯度高于99.99％的金属粉末。基于本研究建立了Pd（II），Au（III）和Pt（IV）的分离和回收。

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