leaching catalytic platinum
Recovery of Platinum and Palladium from the Spent ...
catalytic function deteriorates.2,5) In the catalysts, small amounts of platinum or palladium are contained in large volume of support materials, typically alumina.
Scrap Catalytic Converter Recycling - YouTube
· Recycling Catalytic Converters Nationwide,Scrap Catalytic Converter Buyers Nationwide, Buyers Of Scrap Catalytic Converters Nationwide, Scrap Catalytic Converter Catalog Nationwide, Selling Scrap ...
Are There Precious Metals in Catalytic Converters?
· Platinum Group Metal Recovery from Spent Catalytic Converters . The catalyst component of a catalytic converter is usually platinum (Pt), along with palladium (Pd), and rhodium (Rh). All three of these platinum group metals, or PGMs, are extremely rare but have a broad range of applications in addition to catalytic converters.
US6277341B1 - Process for the rapid leaching of ...
A process is provided for the leaching of copper from chalcopyrite using ferric sulfate in which acceptable rates of leaching are achieved by controlling the surface potential of the chalcopyrite to an empirically determined "window" within the broad range of 350 to 450 mV.
Leaching and Recovery of Platinum Group Metals From UG-2 ...
Leaching and recovery of platinum group metals from UG-2 concentrates nature of the lixiviant, conditions that might require sophisticated equipment, and consumption of lixiviant caused by co-leaching of other constituents of the feed.
Hydrometallurgical recovery/recycling of platinum by the ...
Read "Hydrometallurgical recovery/recycling of platinum by the leaching of spent catalysts: A review, Hydrometallurgy" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
Platinum-recovery - Process, Technology, Patent ...
Platinum is the main precious metal that can be scientifically processed out of the catalytic core. The state-of-the-art technique for the recycling of spent automotive catalyst is Pyrometallurgical processing
"Platinum & palladium recovery from Catalytic converters"
"Platinum & palladium recovery from Catalytic converters" A practical manual for first ... Every platinum mine in the world is at full blast, recycling has come into its own, and still the ... which would interfere with the leaching process that follows the grinding and …
What is the total amount of platinum in a typical ...
There are usually about 3 grams of platinum in a catalytic converter. There are 31.1 grams in an ounce. Platinum is at $2000/ounce so you can figure right at $200 worth. Please note manufacturers are starting to use other materials so you may have very little, if any, platinum.
Platinum group | chemical element group | Britannica.com
The solid leach residue contains 15 to 20 percent platinum-group metals. Sometimes gravity separation is employed prior to flotation; this results in a concentrate containing up to 50 percent platinum metals, making smelting unnecessary.
Recovery of Nickel from Spent Ni/Al2O3 Catalysts using ...
catalytic converters for pollution control. The development ... platinum, palladium, molybdenum, cobalt, copper, iron etc. While in use these ... hydrometallurgical, based on leaching-out of nickel from raw materials with various acids and solutions of ammonia and ammonium salts2,6. Hydrometallurgy processes have been
NO and C Oxidation with Pt Recovered From Spent Catalytic ...
catalytic converter, which contained approximately 1.1% w/w of platinum (Pt), were subjected to a leaching process to assess the relationships between the amount of recovered
High-temperature cyanide leaching of platinum-group metals ...
The U.S. Bureau of Mines investigated leaching automobile catalysts with sodium cyanide (nacn) solutions at high temperatures to recover platinum-group metals (PGM). The feed was monolith rejects, used monolith, and used pellet catalysts. Leaching with a 5-pct nacn solution for 1 h at 160 deg. C dissolved over 97 pct of the PGM in the monolith, over 85 pct of the PGM in the used mo
STUDIES ON PLATINUM RECOVERY FROM SOLUTIONS AFTER …
Studies on platinum recovery from solutions after leaching of spent catalysts by solvent extraction 241 supplier of platinum, accounting for roughly 10%.
POSSIBLE WAYS OF REFINING PRECIOUS GROUP METALS …
auto catalytic converters, e.g. Rose method, cyanide extraction, chlorination, segregation, melting methods, blow- ing with metal vapours and metal collector method. They are based on pyro- and hydrometallurgical processes.
Platinum group | chemical element group | Britannica.com
The solid leach residue contains 15 to 20 percent platinum-group metals. Sometimes gravity separation is employed prior to flotation; this results in a concentrate containing up to 50 percent platinum metals, making smelting unnecessary.
Basic Platinum Recovery from Catalytic Converters - Gold ...
· Hi Everyone, I have a few questions on Platinum, (PGM's) Recovery from Catalytic Converters. I have just harvested a few Converters from a junk yard.
Catalytic Effect of Silver on Bioleaching of Arsenopyrite
Abstract—A study of the effect of different variables (Ag+ concentration, pulp density, pH, inoculation, Fe3+ concentration) on the silver-catalyzed bioleaching of arsenopyrite by Acidithiobacillus ferrooxidans NSJ209 strains has been carried out in shake flasks.
Bioleaching of nickel from equilibrium fluid catalytic ...
Bioleaching of nickel from equilibrium fluid catalytic cracking catalysts Oguz Bayraktar Department of Chemical Engineering, Bioreaction Engineering Laboratory, Izmir …
Oxidative strong metal–support interactions (OMSI) of ...
With this OMSI, the aggregation and leaching of PGMs were significantly inhibited, resulting in an excellent catalytic stability and much improved reusability of supported Pt and Pd catalysts, respectively.
OSTI.GOV Conference: Leaching kinetics of platinum and ...
Empirical rate expressions for both platinum and palladium were obtained from mass balances and concentration-time data in a packed bed reactor using different (HCl):(HNO3) leaching solution concentration ratios. The spent catalysts used in this study (-60 + 70 mesh to …
ALM | Catalytic Static Mixers & Continuous Flow Reactors
Fixed-bed reactors have been a mainstay of catalytic reaction processing for many decades. While easy to construct and implement, they suffer from a number of shortcomings when designing a continuous flow process (1, 9, 13–15).Pressure drop (back-pressure) across a fixed-bed reactor is a major concern when developing a flow process, especially with a viscous medium.
An ion-exchange method for selective separation of ...
· An ion-exchange method has been developed for the separation of palladium, platinum and rhodium from a solution that is highly acidic and contains a considerable amount of lead, aluminum, iron and cerium, obtained by leaching a used honeycomb type automotive catalytic converter.
Why Use Platinum in Catalytic Converters?
Why is platinum used over other catalytic mate-rials such as silver or gold? The role of platinum in catalytic converters is to oxidise carbon monoxide (CO) and hydrocar-bons. Platinum is particularly effective at this under oxygen-excessive conditions, so is often the
Heterogeneous Catalytic Hydrogenation | Johnson Matthey ...
The metals most frequently used in heterogeneous catalytic hydrogenation are palladium, platinum, rhodium, nickel, cobalt and ruthenium. More rarely iridium, copper and rhenium find applications. Figure 2 ( 3 ) illustrates how the product of a reaction can vary depending on the choice of metal catalyst.
Cyanide Leaching Platinum Catalytic Converter Chemistry
· Previous research by the U.S. Bureau of Mines showed that autoclave cyanide leaching of used automobile exhaust catalysts for recovery of platinum group metals (PGM) was technically feasible. This work involves a more detailed investigation of the chemistry of the dissolution of PGM in cyanide solutions.
Automotive spent catalysts treatment and platinum recovery ...
The recovery of Platinum from spent catalysts was examined. Platinum leaching was studied considering particle size, temperature, solid-liquid and HCl/ HNO3 ratio effects. Many elements together with Pt were taken from a mixed spent catalyst sample. The main components of the leach liquor were Pt (1.84 g/ kg ) and Fe (0.94 g/kg ).
Recovery of Platinum and Palladium from the Spent ...
catalytic function deteriorates.2,5) In the catalysts, small amounts of platinum or palladium are contained in large volume of support materials, typically alumina.
Heterogeneous Catalytic Hydrogenation | Johnson Matthey ...
The metals most frequently used in heterogeneous catalytic hydrogenation are palladium, platinum, rhodium, nickel, cobalt and ruthenium. More rarely iridium, copper and rhenium find applications. Figure 2 ( 3 ) illustrates how the product of a reaction can vary depending on the choice of metal catalyst.
WLF Hydrometallurgical Gold Leaching in the ...
Platinum leaching from automotive catalytic converters with aqua regia M Hasani 1, A Khodadadi 1, S M J Koleini 1, A H Saeedi 1, Y Pérez-Pacheco 2 and A