Synergistic Extraction of Rhodium(III) from Hydrochloric Acid Solution with Tri-n-octylamine and Sulfide-type Extractants
Synergistic Extraction of Rhodium(III) from Hydrochloric Acid Solution with Tri-n-octylamine and Sulfide-type Extractants
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DOI：
10.1080/07366299.2015.1039834
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发表时间：
2015-07-29
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
研究了二正己基硫醚（DHS）-三正辛胺（TOA）和N，N '-二甲基-N，N '-二正辛基硫代二甘醇酰胺（TDGA）-TOA混合溶剂在氯仿中对Rh（III）的协同萃取。当单独使用0.5 M TOA、DHS或TDGA时，Rh（III）萃取效率较差。相比之下，0.5 M TDGA-0.5 M TOA和0.5 M DHS-0.5 M TOA混合溶剂浸提的Rh（III）最高分别为90%和70%。在2 M HCl下Rh（III）的分配比的斜率分析和Job图表明，在萃取络合物中Rh（III）：TOA：（DHS或TDGA）的表观化学计量为1：2：1。
Synergistic extraction of Rh(III) from relatively concentrated HCl solution was studied using two mixed solvents (di-n-hexyl sulfide (DHS)-tri-n-octylamine (TOA) and N,N '-dimethyl-N,N '-di-n-octyl-thiodiglycolamide (TDGA)-TOA) in chloroform. The Rh(III) extraction efficiency is poor when 0.5 M TOA, DHS, or TDGA is used independently. In contrast, the 0.5 M TDGA-0.5 M TOA and 0.5 M DHS-0.5 M TOA mixed solvents extract similar to 90% and similar to 70% of Rh(III), respectively, at maximum. Slope analyses and Job's plots for the distribution ratios of Rh(III) at 2 M HCl show that the apparent stoichiometry of Rh(III):TOA:(DHS or TDGA) in the extracted complex is 1:2:1.