Solvent Extraction Characteristics of Ruthenium from Chloride Solutions added Tin(II) with TOA and TOMAC
Solvent Extraction Characteristics of Ruthenium from Chloride Solutions added Tin(II) with TOA and TOMAC
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TOA 和 TOMAC 从添加锡 (II) 的氯化物溶液中萃取钌的特性
DOI：
10.4144/rpsj.66.133
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Masakazu Niinae
中科院分区：
文献类型：
--
作者：
Takeshi Tanishige;Koudai Nagano;Tasuma Suzuki;Masakazu Niinae
氯离子是铂族金属被带入溶液的有效介质之一，因此氯络合物在铂族金属分离的过程化学中尤为重要。Ru(III)氯络合物在有机溶剂中的萃取率很低，这是由于络合物的电荷以及溶液中的惰性，即形成RuCl6-n(H2O)n(n=1-6)所致。从氯化物溶液中提取Ru的问题尚未解决，也没有有效的工业萃取剂。传统上，PGM通过一系列复杂的选择性沉淀和蒸馏技术相互分离，并与其他金属分离。就所实现的分离程度而言，这些通常是低效的。将溶剂萃取法应用于PGMS精制工艺，与传统的沉淀法和蒸馏法相比，具有许多优点。在Rh(III)原料中加入锡(II)是一种使Rh更容易发生萃取反应的好方法。然而，锡(II)的加入对从氯化物溶液中萃取Ru(III)的影响尚不清楚。用三辛胺(TOA)和三辛基甲基氯化铵(TOMAc)从盐酸溶液中萃取Ru，考察了添加锡(II)对Ru的萃取和反萃的影响。添加锡(II)对Ru有较好的萃取效果，但Ru的反萃效果不理想。
Chloride is one of the effective medium in which platinum group metals (PGMs) can be brought into a solution, thus chlorocomplexes are particularly important in the process chemistry of PGMs separations. Ru(III) chlorocomplexes are poorly extracted into organic solvents, which is due to the charge of the complex as well as those inert character in a solution, that is, formation of RuCl6–n(H2O)n (n = 1–6). The problem of solvent extraction of Ru from chloride solutions has not yet been solved and there is no effective industrial extractant for Ru. PGMs are traditionally separated from one another and the other metals by a complex series of selective precipitation techniques and distillation. These are generally inefficient in terms of the degree of separation achieved. Solvent extraction applied to refining process for PGMs offers several advantages over the traditional precipitation methods and distillation. Adding Sn(II) to a Rh(III) feed is a good procedure which can be used to make Rh react more easily to extraction. However, the effect of addition of Sn(II) on extraction of Ru(III) from chloride solution is not clarified. In the present study, the extraction of Ru from hydrochloric acid solutions with tri-n-octylamine (TOA) and trioctyl methyl ammonium chloride (TOMAC) were tested to clarify the effect of addition of Sn(II) on the extraction of Ru and stripping of Ru. The addition of Sn(II) was effective for the extraction of Ru, however, the stripping effeciency of Ru was not sufficient.