3 edition of Methods for producing platinum-group metal coatings from molten alkali cyanides found in the catalog.
Methods for producing platinum-group metal coatings from molten alkali cyanides
R. P. Walters
Bibliography: p. 15-17.
|Statement||by Richard P. Walters and David R. Flinn.|
|Series||Information circular ;, 8974, Information circular (United States. Bureau of Mines) ;, 8974.|
|Contributions||Flinn, David R.|
|LC Classifications||TN295 .U4 no. 8974, TS692.P56 .U4 no. 8974|
|The Physical Object|
|Pagination||17 p. :|
|Number of Pages||17|
|LC Control Number||84600022|
The silver/precious metal bead is placed in a test tube with nitric acid and the tube is given a hot water bath which causes silver to melt, leaving a small particle of a precious metal floating. Step 4: Determining the Grade. If the resulting sample of the Fire assaying is large enough, it will be weighed. Platinum Group Metals (PGMâ€™s) in metallic, powder, solution, ore forms and a wide range of catalysts (both new and spent) can be analysed. The most appropriate method of analysis for each individual sample supplied will be assessed, based on AnchorCer.
When platinum reforming was first introduced, consumption of platinum by the petroleum industry became a major component of industrial demand for the metal. Technical developments in refining processes over the years have led to greater catalyst efficiency, which has reduced the unit amount of platinum required. Ion exchange resins were investigated for the effective recovery of platinum, palladium, and gold from a pregnant cyanide heap leach solution. Screening results indicated that strong-base anion exchange resins proved to be most effective in the recovery of these metal cyanides.
The uses of platinum-group metals. where the metal enables increased storage capacity. Ruthenium is also used in plasma-display panel, where it is applied as a conductive paste to the inner. 3 CHAPTER 3 | PRODUCTION AND USES OF PLATINUM GROUP METALS SUMMARY • Major deposits of PGMs are found in South Africa, Zimbabwe, the U.S., Canada, and Russia. South Africa is the largest producer of PGMs, followed by Russia.
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Methods for producing platinum-group metal coatings from molten alkali cyanides. Avondale, Md.: U.S. Dept. of the Interior, Bureau of Mines, (OCoLC) This Bureau of Mines report reviews and assesses the technology for preparing electrodeposited coatings of the platinum-group metals from molten alkali metal cyanide baths.
Methods are described for the preparation and purification of the cyanide electrolyte. Vacuum drying, fusion, and purity of the cyanide salts are discussed. Over the last two decades the Bureau of Mines had conducted several studies of the electrodeposition of platinum-group metals from a molten alkali metal cyanide bath.
Bureau research has focused on producing platinum-group metal coatings on refractory metals and on more common structural materials. Palladium. See also what's at Wikipedia, your library, or elsewhere.
Broader term: Platinum group; Filed under: Palladium The Radiochemistry of Palladium, by Ove T. Hogdahl (PDF at cinemavog-legrauduroi.com); Effect of hydrogen on tensile properties of palladium-hydrogen system / (Washington, D.C.: National Aeronautics and Space Administration ; Springfield, VA: For sale by the Clearinghouse for Federal.
Electrochemical studies of platinum-group metals in molten alkali metal cyanides [David R. Flinn] on cinemavog-legrauduroi.com *FREE* shipping on qualifying cinemavog-legrauduroi.com: David R. Flinn. A complete treatise on the electro-deposition of metals. Comprising electro-plating and galvanoplastic operations, the deposition of metals by the contact and immersion processes, the coloring of metals, the methods of grinding and polishing.
Atkinson (), Withers and Ritt (2, 3), and Rhoda described the electrodeposition of platinum group metals from molten cyanides under atmospheres of nitrogen or cinemavog-legrauduroi.comr, the available information about the apparatus used in these experiments raises the possibility that the atmospheres over the molten electrolytes were not completely free of air.
Methods for producing platinum-group metal coatings from molten alkali cyanides - R. Walters () Modern electro plating. The principles involved in depositing gold, silver, nickel, copper, brass and other metals, - J.
Van Horne () Modern electrolytic copper refining - T Ulke () Modern electrolytic copper refining - T. Ulke ()5/5(1). platinum group metals from molten cyanides under atmospheres of nitrogen or argon. How- Methods developed by the Bureau of Mines for electrodeposition of platinum, palladium, and iridium are des- cathode of the same metal or of molybdenum.
Coatings were generally made with electro. Nov 03, · A method for recovering platinum group metals from a catalyst material comprises leaching the material with a cyanide solution at a temperature greater than about ° C. to form soluble platinum group metal-cyanide complexes in solution.
Iridium is a chemical element with the symbol Ir and atomic number A very hard, brittle, silvery-white transition metal of the platinum group, iridium is the second-densest metal (after osmium) with a density of g/cm 3 as defined by experimental X-ray cinemavog-legrauduroi.comciation: /ɪˈrɪdiəm/ (i-RID-ee-əm).
The invention relates to a method for producing aqueous preparations of complexes of platinum group metals (PGM) Pt, Pd, Rh and Ir having the general formula [M A /M B /M C (L) a (H 2 O) b (O 2 -) c (OH -) d] (OH-) e (H +) f, wherein M A = Pt II or Pd II, M B = Pt IV, M C = Rh or Ir, L is a neutral monodentate or bidentate donor ligand, and a is an integer between 1 and 4 (or 2) and/or Cited by: 3.
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.
Individual solubilization. The book covers recent developments in the chemistry of the six platinum group metals, namely, platinum, palladium, rhodium, iridium, ruthenium and osmium. The material falls into three broad areas.
Firstly, the occurrence, extraction and use of the metals. Speclrwhimica Ada, Vol. 40B, Nos 1/2, pp./85 I+ Printed in Great Britain.
Pergaroon Press Ltd. Non-alkali metal interferences in the determination of platinum group metals by d.c. plasma emission spectrometry ROBERTA L. Fox POP Industries, Inc., Alondra Boulevard, Santa Fe Springs, CAU.S.A. [Received 3 January ; in revised/arm 9 April Cited by: 9. Rhodium is a noble metal, resistant to corrosion, found in platinum- or nickel ores together with the other members of the platinum group metals.
It is a rare, silvery-white, hard, and chemically inert transition metal. It is a member of the platinum group.
Naturally occurring rhodium is usually found as the free metal, alloyed with similar metals. Apr 19, · Another object of the invention is to provide a method for the dissolution of platinum group metals selected from the group consisting of platinum, palladium, rhodium and rothenium contained in materials selected from the group consisting of ores, precious.
In this approach, a disk of metal is implanted into the face of an inert cylinder, which is rotated at a given speed while submerged in the leaching solution.
Commercially available rotating disks often have Teflon fluorocarbon polymer shrouds. The surface area of the metal is. Jun 05, · During melting, the heavy metal oxides in the glass were reduced to metallic states by CO, and PGMs were extracted in the generated liquid metal, which was separated from the molten oxide phase as an agglomerate.
The PGM can be further separated Cited by: 5. The Platinum Group Metals as Coating Materials (continued) Like gold, platinum and palladium alloy coatings require a nickel undercoat to act as a barrier against diffusion and corrosion migration.
In rhodium plated contacts, a hard nickel underplate may be necessary to help prevent cracking of the harder, more layer of brittle rhodium.
Cyanide Complexes of the Transition Metals. Alkali metal-templated assembly of the tetrahedral cyanometallate cages [M⊂Mo4(μ-CN)6(CO)12]5− (M = Li, Na) In the nickel to platinum group.A mixture of aluminium powder and a metal oxide powder (iron, copper, etc.) is ignited in a crucible, producing molten metal with the evolution of intense heat.
The crucible is tapped and the molten metal flows into the cavity to be welded (which is surrounded by a sand mould). This is often used to repair castings or forgings.Iridium is a chemical element with the symbol Ir and atomic number A very hard, brittle, silvery-white transition metal of the platinum group, iridium is the second-densest metal (after osmium) with a density of as defined by experimental X-ray cinemavog-legrauduroi.com room temperature and standard atmospheric pressure, iridium has a calculated density higher than osmium measured the same way.