Moreover, separation of noble metals, particularly platinum metals and gold from geological samples, industrial products, synthetic mixtures along with other elements is a problem of significant importance nowadays.
This chapter deals with the separation of the platinum-group metals from base metal sulfides, and refining of nickel, copper and cobalt and describes the processing routes.
Although Rh is an industrially important and the most expensive platinum group metal (PGM), the selective and preferential separation of Rh from PGM mixtures still remains as a big challenge.
Among platinum-group metals (PGMs), palladium (Pd) and platinum (Pt) are raw elements for the production of advanced materials and automotive exhaust catalysts (Li and Binnemans, 2021; Franc et al., 2005).
The present study dealt with liquid–liquid separation of PGMs (Pt, Pd, and Rh) from a model chloride-based leach solution using an undiluted phosphoni…
The platinum-group metals (PGM) are technologically important metals which are becoming increasingly relevant in reducing harm to the environment. The…
The separation and purification of the PGM is largely carried out by exploiting differences in the chemistry of their anionic chloro-complexes. These …
294 BureauofStandardsJournalofResearch [Vol.it 1.METHODRECOMMENDEDFORTHESEPARATIONOFPLATINUM FROMPALLADIUM,RHODIUM,ANDIRIDIUM,EITHERCOL- LECTIVELYORSINGLY (a ...
A new technique for selective separation and enrichment of platinum group metals (platinum, palladium, rhodium, iridium, ruthenium) from model hydrochloric and chloride media into hydrophobic deep eutectic solvents without the use of chelating agents is presented for the first time.
Separation of the Platinum-Group Metals from Base Metal Sulfides, and the Refining of Nickel, Copper and Cobalt 36.1. Overview of the Refining of the Platinum-Group Metals
Semantic Scholar extracted view of "Separation of palladium and platinum metals by selective and simultaneous leaching and extraction with aqueous/non-aqueous solutions" by Viet Nhan Hoa Nguyen et al.
This article describes the complex and lengthy cycle of operations required to effect complete recovery of the six platinum metals and to yield at the same time electrolytically refined copper and nickel. Today the joint activities of Rustenburg and Johnson Matthey constitute the world's largest source of the platinum metals in all forms.
The separation chemistry of the platinum-group metals is among the most complex and challenging of metal separations. A brief description of procedures for isolating the platinum-group metals is set forth below, followed by descriptions of assaying and scrap-refining techniques.
An effective solvent extraction-based method has been developed to recover individual platinum group metals (PGMs) (i.e. Pd, Pt and Rh) with high purity from acidic chloride media using phosphonium-based ionic liquid Cyphos IL 101 ([P66614]+Cl−) diluted in xylene used as a model of industrial diluents such as SOLVE
A novel ionic liquid (IL) functionalized with thiodiglycol amic acid containing a soft S donor was synthesized for the effective and efficient extraction of platinum group metals (Ru, Rh, and Pd) from aqueous nitric acid solutions, such …
Semantic Scholar extracted view of "Separation of platinum group metals from model chloride solution using phosphonium-based ionic liquid" by S. Ilyas et al.
At present the final refining stage that produces the individual platinum group metals is carried out by selective precipitation from a solution of mixed platinum group metals, but this is inefficient as far as the degree of separation is concerned.
The effects of knowledge of the solution chemistry of the platinum metals on their separation by solvent extraction and ion-exchange methods are revie…
Despite these methods, the separation of these metals remains a challenging task in the field of PGMs recovery. The electrochemical processes such as electrodeposition and electrochemical leaching or electrochemical dealloying offer several benefits for the separation of platinum group metals (PGMs) from spent automotive …
For this reason, in order to obtain pure metals, it is extremely important to choose an effective, selective method for the recovery and separation of the platinum …
The present work explores a possibility to develop a three-liquid-phase extraction approach for one-step separation of platinum metal ions in highly concentrated acidic chloride …
A macroporous copolymer of glycidyl methacrylate — ethylene dimethacrylate, modified with ethylenediamine, is able to bind only ionic particles (PdCl4)2− from strongly acid solutions containing palladium- and copper salts. After washing the sorbent, the metal can be quantitatively desorbed with a concentrated hydrochloric acid solution. The procedure …
The extraction of platinum metals generally goes through three steps: enrichment, separation of platinum metals, and refining of platinum. The concentrate is …
A new technique for selective separation and enrichment of platinum group metals (platinum, palladium, rhodium, iridium, ruthenium) from model hydrochloric and chloride media into hydrophobic deep ...
Abstract A novel ionic liquid (IL) functionalized with thiodiglycol amic acid containing a soft S donor was synthesized for the effective and efficient extraction of platinum group metals (Ru, Rh, and Pd) from aqueous nitric acid solutions, such as high-level radioactive liquid waste (HLLW). The IL enabled rapid extraction of Pd(II) with an …
The recovery and purification of platinum group metals (PGMs) from multicomponent solutions are essential for attaining a sustainable circular economy. Herein, we designed redox-active electrosorbents for the separation of PGM chloroanions by leveraging the auto-oxidation of redox electrodes.
A method is described for the analytical separation of platinum from each or all of the three metals, palladium, rhodium, and iridium. It is based upon the complete precipitation of the hydrated dioxides of palladium, rhodium, and iridium in a
Chromatographic separation of platinum group metals from simulated high level liquid waste using macroporous silica-based adsorbents
Extraction and separation of platinum group metals (PGMs) from secondary raw materials are usually carried out via hydrometallurgical processes. These processes use strongly oxidizing acidic solutions, such as aqua regia or hydrochloric acid in the presence of chlorine gas, which may have negative environmental impacts and are …
An improved process which makes use of liquid–liquid extraction has been developed to a pilot plant stage, and this paper highlights some of the chemical and process principles …
Mutual separation of platinum group metals (PGMs) is a particularly challenging issue in metal recovery technology. In this study, we report the successful separation of Pt(IV), Pd(II), and Rh(III)...
Abstract The paper investigated the possibility of extractive separation of palladium from platinum and rhodium with ionic liquid Cyphos IL 101. A technological …
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