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Precious Metal Refining
The typical strategy adopted by large refiners is base metal removal followed by the separation of gold and silver (known as parting), culminating with fine gold …
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Solvent Extraction as a Method of Recovery and Separation of …
A Combined Deep Eutectic Solvent–Ionic Liquid Process for the Extraction and Separation of Platinum Group Metals (Pt, Pd, Rh). Molecules 2021, 26, 7204. …
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Liquid Anion Exchange Chromatographic Extraction and Separation …
A simple and selective method was developed for the determination of platinum(IV) with n-octylaniline in toluene. In present study, the use of n-octylaniline in toluene for the extraction of platinum(IV) from ascorbate media was carried out. The effect of various parameters, such as pH, equilibrium time, extractant concentration, and …
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Precious Metal Refining
The typical strategy adopted by large refiners is base metal removal followed by the separation of gold and silver (known as parting), culminating with fine gold production. Platinum group metals are recovered and separated after gold. Figure 2 shows how three types of dore bullion can be integrated into this general scheme.
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Lynas wins U.S. Defense contract to built REE plant in Texas
The Department of Defense is contributing $30.4 million to the project. The Hondo, Texas facility will complement Lynas' existing Australian and Malaysian operations and is expected to be co-located with the proposed heavy rare earths separation facility. "This award aligns with the U.S. government's strategy to ensure secure and reliable ...
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Selective Recovery of Platinum (IV) from HCl Solutions Using 2
The selective separation and recovery of specific platinum-group metals (PGMs) from metal mixtures is a significant challenge owing to the similarity of these metals in terms of chemical and physical properties. Among the typical PGMs (Pd, Pt, and Rh), the selective recovery of Pt prior to the recovery of Pd and Rh is in high demand. In this …
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Iridium, separation from platinum metals
Iridium, separation from platinum metals Iridium metal is separated from its other metal ores when the combined minerals are dissolved with a strong acid know as aqua regia, which is a mixture of 25% nitric acid and 75% hydrochloric acid. Aqua regia is the only acid that will dissolve platinum and gold. Once the platinum and other metals are dissolved, …
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DOD Announces Rare Earth Element Awards to Strengthen …
Nov. 17, 2020 | As part of the U.S. government's strategy to ensure secure and reliable supplies of critical minerals under Executive Order 13817, today the …
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Separation of platinum and ruthenium by a sulphoxide modified
One useful solution for the separation of platinum and ruthenium from hydrochloric acidic solutions is adsorption. Fixed bed adsorption is an efficient and effective method conducting sorption processes for industrial applications when a suitable low cost adsorbent is available. ... This study deals with the solid-phase extraction (SPE) of ...
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Buy Platinum Bullion Bars & Coins Online | Lowest Prices
Buy Platinum Coins & Bars at the lowest price guaranteed from the Most Trusted Bullion Dealer Online! Brilliant uncirculated 1 oz .999 pure platinum rounds direct …
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Precious Metals: Platinum Group Metals (PGM), Gold, Silver
Favorable Characteristics of MRT™ in PGM Refining include: Read our paper: Precious Metal Separation and Recovery from Primary and Secondary Sources using SuperLig® Molecular Recognition Technology (MRT) Processes. Highly selective single-pass separations of 99%+ with product purities of 99.95 - 99.99%. Minimization of platinosis …
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Separation of platinum group metals from model chloride solution …
Separation of platinum and palladium from concentrated HCl solutions by extraction with mixture of amines (Aliquat 336/Alamine 336/TOA) and neutral extractants (TBP/TOP/MIBK) have been investigated. The mixture of Aliquat 336 and TBP led to higher Pt(IV) separation factor at 6 M HCl solution.
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Extraction and Concentration of Palladium(II) from Simulated …
selective separation of platinum(IV) and palladium(II). For example, Alamine 336 (0.03 M, toluene, 30 min, A : O = 1 : 1) recovers palladium(II) and platinum(IV) from a solution containing 776 mg L–1 Pd and 897 mg L–1 Pt (pH 1) to only 66.8 and 79.6%, respectively [14]. Furthermore, when developing a procedure for
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Mutual separation of platinum group metals via seed-mediated …
Inspired by this concept, we propose a novel strategy for the mutual separation of PGMs utilizing seed-mediated growth on a polymer with a metal-coordination unit (thiocarbonyl groups, Fig. 1).In brief, nucleation of Pt 4+ ions with NaBH 4 attaches the Pt 0 seeds onto the thiocarbonyl sulfur atoms of the polymer (Fig. 1 a). The Pt seeds …
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Golden Parachutes in Executive Compensation Packages
Golden Parachutes in Executive Compensation Packages. A golden parachute in business is the name given to the clause in a top executive's employment agreement that defines the payout the individual will receive should they be terminated or forced out of an organization before the end of their contract. For many top executives at …
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Development of Advanced Reprocessing Technologies
separation) or (ii) changing the chemistry in the first separation step so that only uranium is separated, while keeping plutonium, minor actinides and fission products in the waste solution for later processing (e.g. UREX 6). Advanced separation The purpose of the ongoing development work on advanced separation methods is to remove minor
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SEPARATION OF PLATINUM GROUP METALS
The elements which make up the first and last bands are essentially impurities when considered from the perspective of the separation of platinum from palladium. The purity of the palladium and platinum separated in accordance with this method was extremely high, in excess of 99.9% for Pt and 99.4% for Pd at very high yields.
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Separation of platinum group metals using deep eutectic solvents …
A new separation strategy for PGMs (Pt, Pd, Rh, Ir, Ru) was proposed using tetraalkylammonium based deep eutectic solvents (DESs). • The DESs capacity is extremely high and equals 110 and 103 g kg −1 for Pd(II) and Pt(IV), respectively.. The purity exceeding 99.9% for target fractions was obtained after extraction of PGMs from …
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Chromatographic separation of platinum group metals from
Chromatographic separation of platinum group metals from simulated high level liquid waste using macroporous silica-based adsorbents J Chromatogr A. 2013 Oct 18;1312:37-41. doi: 10.1016/j.chroma.2013.08.089. Epub 2013 Aug 29. Authors Yuanlai Xu 1 ...
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Separation of platinum from other metals
The separation of platinum from rhodium is more difficult to effect than that of platinum from palladium, but the use of amides leads to much improved results compared with those obtained by the old method using ammonium chloride. Thus, in 50 milliliters of a solution containing 4.95 grams of platinum and 0.55 gram of rhodium, the addition of 3 ...
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How to Separate Gold, Silver and Platinum?
Want to Separate the Gold, Silver and Platinum Something Contains? Burn It! We have written before about burning materials, or exposing them to very high heat, as …
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Molecules | Free Full-Text | A Combined Deep Eutectic Solvent
Recovery of platinum group metals from spent materials is becoming increasingly relevant due to the high value of these metals and their progressive depletion. In recent years, there is an increased interest in developing alternative and more environmentally benign processes for the recovery of platinum group metals, in line with …
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Separation of platinum(IV) and palladium(II) from concentrated
Particularly for the most competing element of platinum, the Pd-Pt separation coefficient reached 4 × 10 4 level. Moreover, palladium can be effectively stripped from the loaded organic phase by ammonia. The extraction efficiency of Pd(II) maintained at a high level of around 96 % after five extraction-stripping cycles, indicating …
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Separation of platinum, palladium and rhodium from
Separation of platinum from palladium was partially achieved by selective stripping of PtCl 6 2-with 0.5 M of NaClO 4 in 1.0 M HCl while PdCl 4 2-was eluted with 0.5 M thiourea in 1.0 M HCl. Separation of platinum from iridium and rhodium under 1 M HCl concentration was successful on triethylenetriamine (TETA)-functionalized Merrifield beads.
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Separation of the Platinum-Group Metals from Base Metal
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 …
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Precious Metals: Platinum Group Metals (PGM), Gold, Silver
Reduction of labor, construction, and maintenance costs by simplification of the separation system. Reduction of processing pipeline time resulting in low metal financing costs and …
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Method for the separation of platinum, palladium
The effects of knowledge of the solution chemistry of the platinum metals on their separation by solvent extraction and ion-exchange methods are reviewed, for the period 1950–1983. The review concentrates on the chloro-complexes of these metals and indicates those areas which need more investigation or interpretation to provide adequate ...
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