Effect of Addition of Tin(II) Chloride on Extraction of Rhodium from Hydrochloric Acid Solution with LIX 26.
Effect of Addition of Tin(II) Chloride on Extraction of Rhodium from Hydrochloric Acid Solution with LIX 26.
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添加氯化锡 (II) 对使用 LIX 26 从盐酸溶液中萃取铑的影响。
DOI：
10.2473/shigentosozai.111.875
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
T. Wakamatsu
中科院分区：
文献类型：
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作者：
Masakazu Niinae;Munehiko Yamamoto;M. Sano;Y. Nakahiro;T. Wakamatsu
与传统的沉淀方法相比，溶剂萃取应用于铂族金属（PGM）的精炼工艺具有多种优势。氯化物是铂族金属（PGM）进入溶液的唯一有效介质，因此氯络合物在铂族金属（PGM）分离的工艺化学中尤为重要。 Rh(III)氯络合物很难萃取到有机溶剂中，这是由于该络合物的电荷以及其在溶液中的不稳定特性，即形成RhCl6-n(H2O)n(3-n)-(n=1-6)。从氯化物溶液中溶剂萃取Rh的问题尚未解决，也没有有效的Rh萃取剂。本研究通过取代8-羟基喹啉(LIX 26)从盐酸溶液中萃取Rh进行了试验，以阐明SnCl2的添加对Rh萃取和反萃的影响。本研究得到的结果概括如下：(1)Rh的萃取效率随着[Sn]:[Rh]摩尔比的增加而增加，当[Sn]:[Rh]的摩尔比大于10:1时，萃取效率较高。(2)讨论了用LIX 26从含SnCl2的盐酸溶液中萃取Rh的机理，并考虑了以下萃取反应。3HLo+4H+a+Rh(SnCl3)54-, a=(H2L)3RhH(SnCl3)5,o(3)Rh从有机物中的萃取效率硝酸溶液相优于硫酸溶液。
Solvent extraction applied to refining process for platinum group metals (PGMs) offers several advantages over the traditional precipitation methods.Chloride is the only effective medium in which PGMs can be brought into a solution, thus chlorocomplexes are particularly important in the process chemistry of PGMs separations. Rh (III) chlorocomplex is poorly extracted into organic solvents, which is due to the charge of the complex as well as its labile character in a solution, that is, formation of RhCl6-n(H2O)n(3-n)-(n=1-6). The problem of solvent extraction of Rh from chloride solutions has not yet been solved and there is no effective extractant for Rh.In the present study, the extraction of Rh from hydrochloric acid solutions with substituted 8-hydroxyquinoline (LIX 26) was tested to clarify the effect of addition of SnCl2 on the extraction and stripping of Rh.The results obtained in this study are summarised as follows:(1) The extraction efficiency of Rh increased with an increase in the molar ratio of [Sn]:[Rh] and when the molar ratio of [Sn]:[Rh] was more than 10: 1, high extraction efficiency was obtained.(2) The extraction mechanism of Rh from hydrochloric acid solutions containing SnCl2 with LIX 26 was discussed and the following extraction reaction was considered.3HLo+4H+a+Rh(SnCl3)54-, a=(H2L)3RhH(SnCl3)5, o(3) The stripping efficiency of Rh from the organic phase by nitric acid solution was better than that by sulfuric acid solution.