Solvent extraction separation and recovery of palladium and platinum from chloride leach liquors of spent automobile catalyst

Lee, Jin Young; Raju, B. David; Kumar, B. Nagaphani; Kumar, J. Rajesh; Park, Hyung-Kyu; Reddy, B. S. R.

doi:10.1016/j.seppur.2010.04.003

Cited by 127 publications

(46 citation statements)

References 25 publications

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“…This indicates that PAN-oxime fiber has selective binding ability for Pd(II) in a mixture of Pd(II) and Pt(IV). For better comparison, the selectivity coefficients (α Pd(I I)/Pt(IV) ) of PAN-oxime and Amberjet™ 4200 for Pd(II) in the mixture of Pd(II) and Pt(IV) were calculated using Equation (3).…”

Section: Isotherms Studymentioning

confidence: 99%

“…Indeed, many researchers reported that some precious metals could be recovered using various techniques such as solvent extraction [2,3], chemical precipitation [4,5], ion exchange system [6,7], and chelation [8]. However, there were several drawbacks to these techniques, such as poor selectivity, difficult stripping, low recovery efficiencies…”

Section: Introductionmentioning

confidence: 99%

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Development of Surface-Modified Polyacrylonitrile Fibers and Their Selective Sorption Behavior of Precious Metals

et al. 2016

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Abstract:The purpose of this study was to design a powerful fibrous sorbent for recovering precious metals such as Pd(II) and Pt(IV), and moreover for identifying its selectivity toward Pd(II) or Pt(IV) from a binary metal solution. For the development of the sorbent, polyacrylonitrile (PAN) was selected as a model textile because its morphological property (i.e., thin fiber form) is suitable for fast adsorption processes, and a high amount of PAN has been discharged from industrial textile factories. The PAN fiber was prepared by spinning a PAN-dimethylsulfoxide mixture into distilled water, and then its surface was activated through amidoximation so that the fiber surface could possess binding sites for Pd(II) and Pt(IV). Afterwards, by Fourier-transform infrared (FT-IR) and scanning electron microscopy (SEM) analyses, it was confirmed that the amidoximation reaction successfully occurred. The surface-activated fiber, designated as PAN-oxime fiber, was used to adsorb and recover precious metals. In the experiment results, it was clearly observed that adsorption capacity of PAN-oxime fiber was significantly enhanced compared to the raw material form. Actually, the raw material does not have sorption capacity for the metals. In a comparison study with commercial sorbent (Amberjet™ 4200), it was found that adsorption capacity of PAN-oxime was rather lower than that of Amberjet™ 4200, however, in the aspects of sorption kinetics and metal selectivity, the new sorbent has much faster and better selectivity.

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Section: Isotherms Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of Surface-Modified Polyacrylonitrile Fibers and Their Selective Sorption Behavior of Precious Metals

et al. 2016

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“…The literature review shows that this TSIL is the excellent extractant of heavy metal ions, such as Hg(II), Cu(II), Ag(I), Fe(III), Cd(II), and Pb(II) from aqueous solutions (Kogelnig et al 2008;Egorov et al 2010;Fisher et al 2011). Spent catalysts and electronic scraps are potential source of palladium (Cieszynska and Wisniewski 2012;Saternus and Fornalczyk 2013;Lee et al 2010). Palladium is usually present in aqueous solutions along with various metals, particularly present in the leach liquor of metallic waste.…”

Section: Introductionmentioning

confidence: 99%

Facilitated transport of palladium(II) across polymer inclusion membrane with ammonium ionic liquid as effective carrier

Pośpiech

2017

Chem. Pap.

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This work focuses on the application of polymer inclusion membrane (PIM) with tricaprylmethylammonium thiosalicylate, [A336][TS] (TOMATS), a thiol-containing task-specific ionic liquid for the transport of Pd(II) ions from aqueous solutions. 0.3 M thiourea in 0.1 M hydrochloric acid was found the most effective stripping phase in the transport of Pd(II) from membrane phase containing TOMATS. Separation of Pd(II) ions was also carried out from hydrochloric acid solution containing Pt(IV), Fe(III), Ni(II), and Mn(II). Pd(II) ions were preferably transported in the presence of these metal ions. The separation coefficients followed the order:[TS] proved to be an excellent ion carrier for Pd(II) from hydrochloric acid solution. The results also showed that transport efficiency of the PIM was reproducible and it can be useful for the development of the simple and highly effective method of Pd(II) recovery from leach liquor of spent catalysts.

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“…The direct hydrometallurgical leaching of PGMs from spent catalysts involves hydrochloric acid alone, or with different oxidizing agents [5], with the liquid-liquid extraction (solvent extraction, SX) [6] and the ion exchange [7] techniques being the most common approaches to separate, concentrate, and purify solutions containing PGMs. The composition of the leaching media coming from the treatment of secondary sources is rather different from the original leaching solutions of the PGMs mines [6]; therefore, SX research for improving the performance of well-known and/or commercial extractants [8,9] or for developing new molecules [10,11] to process the typical leaching media of secondary raw materials is currently very active.…”

Section: Introductionmentioning

confidence: 99%

Palladium(II) Recovery from Hydrochloric Acid Solutions by N,N′-Dimethyl-N,N′-Dibutylthiodiglycolamide

Paiva

Martins

Ortet

2015

Metals

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N,N′-dimethyl-N,N′-dibutylthiodiglycolamide (DMDBTDGA) has been synthesized, characterized, and is investigated in this work as a potential liquid-liquid extractant for palladium(II), platinum(IV), and rhodium(III) from hydrochloric acid solutions. Pd(II) is the only ion which is efficiently removed by DMDBTDGA in toluene from 1.5 M to 4.5 M HCl, but it is not extracted from 7.5 M HCl. Pd(II) stripping is quantitatively achieved by an acidic thiourea solution. Pd(II) extraction kinetics are highly favored (2-5 min). Distribution data points to a DMDBTDGA:Pd(II) species with a 1:1 molar ratio. Pd(II) can selectively be recovered by DMDBTDGA from 4.0 M HCl complex mixtures containing equivalent concentrations of Pt(IV) and Rh(III). When five-fold Fe(III) and Al(III) concentrations are present, only Pt(IV) in the presence of Fe(III), and Fe(III) itself, are extensively co-extracted together with Pd(II). However, Fe(III) can easily be eliminated through an intermediate scrubbing step with water.

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Solvent extraction separation and recovery of palladium and platinum from chloride leach liquors of spent automobile catalyst

Cited by 127 publications

References 25 publications

Development of Surface-Modified Polyacrylonitrile Fibers and Their Selective Sorption Behavior of Precious Metals

Development of Surface-Modified Polyacrylonitrile Fibers and Their Selective Sorption Behavior of Precious Metals

Facilitated transport of palladium(II) across polymer inclusion membrane with ammonium ionic liquid as effective carrier

Palladium(II) Recovery from Hydrochloric Acid Solutions by N,N′-Dimethyl-N,N′-Dibutylthiodiglycolamide

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