HIGHLY EFFICIENT EXTRACTION OF RHODIUM(III) FROM HYDROCHLORIC ACID SOLUTION WITH AMIDE-CONTAINING TERTIARY AMINE COMPOUNDS
HIGHLY EFFICIENT EXTRACTION OF RHODIUM(III) FROM HYDROCHLORIC ACID SOLUTION WITH AMIDE-CONTAINING TERTIARY AMINE COMPOUNDS
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DOI：
10.1080/07366299.2015.1012883
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发表时间：
2015-06-07
影响因子：
2
通讯作者：
Tanaka, Mikiya
中科院分区：
文献类型：
--
作者：
Narita, Hirokazu;Morisaku, Kazuko;Tanaka, Mikiya
研究了含N，N-二取代酰胺的叔胺（ACTA）化合物（N，N-二正己基（N-甲基-N-正辛基-乙酰胺）胺（MonoAA）、N-正己基-双（N-甲基-N-正辛基-乙酰胺）胺（BisAA）和三（N-甲基-N-正辛基-乙酰胺）胺（TrisAA））从HCl溶液中萃取Rh（III）的行为。ACTA比三正辛胺（TOA）更有效地萃取Rh（III），并且萃取效率随着酰胺基团数目的增加而增加：TrisAA > BisAA > MonoAA >> TOA。对于所有ACTA，从2 M HCl中提取的主要Rh（III）络合物可能是{[RhCl 5（H2O）]中心点（ACTA中心点H）（2）}。ACTA和TOA的表观碱度从Rh（III）提取效率观察到的相反顺序变化。Rh（III）可以很容易地使用10 M HCl溶液反萃取，与类似负载的Pd（II）和Pt（IV）相比具有高选择性。
Extraction of Rh(III) from a HCl solution with N,N-disubstituted amide-containing tertiary amine (ACTA) compounds (N,N-di-n-hexyl(N-methyl-N-n-octyl-ethylamide)amine (MonoAA), N-n-hexyl-bis(N-methyl-N-n-octyl-ethylamide)amine (BisAA), and tris(N-methyl-N-n-octyl-ethylamide)amine (TrisAA)) was investigated. The ACTAs extract Rh(III) more efficiently than tri-n-octylamine (TOA), and the extraction efficiency increases with increasing number of amide groups: TrisAA > BisAA > MonoAA >> TOA. For all ACTAs, the predominant Rh(III) complex extracted from 2 M HCl is probably {[RhCl5(H2O)]center dot(ACTA center dot H)(2)}. The apparent basicity of the ACTAs and TOA varies in the opposite order from that observed for the Rh(III) extraction efficiency. Rh(III) can be readily back-extracted using 10 M HCl solution possessing a high selectivity over similarly loaded Pd(II) and Pt(IV).