Application of a Novel Phosphonium-Based Ionic Liquid to the Separation of Platinum Group Metals from Automobile Catalyst Leach Liquor
Application of a Novel Phosphonium-Based Ionic Liquid to the Separation of Platinum Group Metals from Automobile Catalyst Leach Liquor
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DOI：
10.1021/acs.iecr.8b05848
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发表时间：
2019-03-06
影响因子：
4.2
通讯作者：
Goto, Masahiro
中科院分区：
文献类型：
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作者：
Firmansyah, Mochamad L.;Kubota, Fukiko;Goto, Masahiro
从汽车尾气催化剂中回收铂族金属具有重要意义，湿法冶金萃取是一种有效的方法。在本研究中，一种新设计的膦基离子液体（IL）被施加到与不同的pH水平结合的汽车催化剂浸出液中的铂族金属的分离和回收。该IL，三辛基十二烷基氯化鳞（P-8，P-8，P-8，Cl-12），（允许定量萃取Pd（II）。在任何浓度的盐酸，与几乎80%的Rh（III）去除1 mol L-1盐酸后，两次萃取。显著量的Fe（III）被提取到IL相中，但可以使用1摩尔Na 2SO 3去除。分别使用1 mol CS（NH 2）（2）和5 mol HCl从IL中选择性回收Pd（II）和Rh（III）。因此，这项工作证明了通过优化各种参数的选择性回收铂族金属，并显示了该IL在从浸出液中回收铂族金属方面的显著潜力。
The recovery of platinum group metals (PGMs) from automotive exhaust catalysts is important, and hydrometallurgical extraction is an effective approach. In the present study, a newly designed phosphonium-based ionic liquid (IL) was applied to the separation and recovery of PGMs from an automobile catalyst leach liquor in conjunction with varying pH levels. This IL, trioctyldodecyl phosphonium chloride (P-8,P-8,P-8,Cl-12), ( allows quantitative extraction of Pd(II). at any HCl concentration, with almost 80% removal of Rh(III) at 1 mol L-1 HCl after two extractions. Significant amounts of Fe(III) were extracted into the IL phase, but could be removed using 1 mol Na2SO3. The Pd(II) and Rh(III) were selectively recovered from the IL using 1 mol CS(NH2)(2) and 5 mol HCl, respectively. This work therefore demonstrated the selective recovery of PGMs through optimization of various parameters and shows the significant potential of this IL with regard to recycling PGMs from leach liquor.