Platinum group metals (PGMs) such as platinum (Pt), palladium (Pd), and rhodium (Rh) are widely used in automobile, chemical engineering, petroleum, electrical, and electronic industries due to their …
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Metals recovery. Platinum was isolated as a black powder by treating its eluate with ascorbic acid [22]. For this reason 0.1 mol L −1 ascorbic acid is not …
The maximum platinum recovery was approximately 99% when the optimum CFA addition, iron collector addition, and CaO/SiO2 mass ratio were 30–50 wt%, 5 wt%, and 0.7–0.8, respectively, at 1550 ...
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Recovery of platinum and palladium from spent auto-catalysts by hydrometallurgy. • Best conditions for leaching: 11.6 mol L −1 HCl, 1%vol H 2 O 2, 60 °C, …
Dissolution of platinum group metals with a cyanide solution, e.g., sodium cyanide solution, is relative easy, particularly the dissolution of PGM's in their elemental state to form cyano-complexes that are stable in aqueous solutions. ... Another object of the invention is to provide a method for the recovery of platinum group metals from ores.
Particularly, the advantages, challenges, and perspective are highlighted in terms of commercial applications. This study aims to present the current research for scholars, and to identify a promising PGMs separation method that is safe and effective. ... Recovery of platinum from spent petroleum catalysts: optimization using response …
In order to increase the recovery of PGMs by flotation, it is necessary to optimise the liberation of the key minerals in which the platinum group elements (PGEs) are contained which include sulphides, arsenides, tellurides, and ferroalloys among others, while at the same time ensuring the optimal depression of gangue minerals. In order to …
Problems of Large Scale Recovery There has always been a strong economic incentive to recover platinum metals after use, and refiners are accustomed to treating fairly large quantities returned either as metallic scrap or dispersed in sweepings and residues of various kinds. The large-scale recovery of platinum from a relatively
The efficient and economic recovery of the platinum from spent catalyst is therefore of great importance to the commercial success of catalytic reforming. This article describes …
A recovery gauze system is to be designed for a nitric acid plant operating at 4.5 atmospheres pressure and a nitrogen loading of 13.2 tons of nitrogen in ammonia per square meter per day over a catalyst gauze cycle length of 150 days. The catalyst loss rate is known to be 0.144 g. of Pt and Rh per ton of nitrogen.
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The efficient and economic recovery of the platinum from spent catalyst is therefore of great importance to the commercial success of catalytic reforming. This article describes the methods adopted in the Johnson Matthey refineries, particularly for sampling, to achieve the highest possible recoveries of these residues.
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This work describes a route for platinum recovery from spent commercial Pt and PtSnIn/Al 2 O 3 catalysts using strong basic mesoporous and macroporous anion exchange resins (Cl − form). The catalysts were leached with aqua regia (75 °C, 20–25 min).Platinum adsorption was influenced by the presence of other metals which form …
The platinum group metals (PGMs) and associated minerals are particularly refractory to most traditional direct leach processes. However, the remoteness of many new ore deposits, socio-political risks, the scarcity of skilled labour and constraints on the availability of water and electrical power makes it increasingly more difficult to ...
For light water reactor fuel, the approximate composition of the platinum group metals fraction is: palladium 33, rhodium 11 and ruthenium 56 per cent. Rhodium, currently the most valuable of the three, is generated in the lowest yield. The isotopic composition of the fission derived platinum group metals is different from that of the natural ...
Keywords: dry aqua regia, molten salt, platinum, recovery, solidliquid separation 1. Introduction Platinum (Pt) and palladium (Pd) are platinum-group metals (PGMs), which are important metals for jewelry, coins, and other industrial applications, particularly owing to their high catalytic abilities and chemical stability. They are
Abstract and Figures. Considering economics and environmental sustainability, recycling of critical metals from end-of-life devices should be a priority. In this work the hydrometallurgical ...
At an optimum nano-frother dosage of 20 g/t a recovery of 73.8%, 77.0%, 84.0% and 78.2% platinum, palladium, nickel and copper respectively was realized. However, the associated grades were lower ...
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Platinum-group metals (PGMs), particularly palladium (Pd) and platinum (Pt), are essential active components of automotive/hydrogen vehicles, ... Palladium and platinum recovery tests for optimal parameters. Operational parameters such as temperature, BP concentration and operation time on Pd (II) recovery were optimized by …
The recovery process of platinum from spent automobile catalyst mainly consists of pretreatment followed by enrichment and refining, involving pyro- and …
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Recovery of platinum and palladium from spent auto-catalysts by hydrometallurgy. • Best conditions for leaching: 11.6 mol L −1 HCl, 1%vol H 2 O 2, 60 °C, L/S = 2 L kg −1, 3 h. • Best solvent extraction systems for Pd and Pt: Cyanex® 471X and Cyphos® IL 101. • Efficient stripping agents for Pt and Pd from Cyphos® IL 101 need ...
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of platinum metals are also pr esent, but data on the exact amounts of PGMs given in met-ric tons are rarely available [13,14]. Figure 2 shows the countries with the largest natural resources of PGMs [1,2,11,15]. Figure 2. The locations of the platinum group metals ma in resources by country. (Source: own elab-oration based on literature data ...
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