Platinum Metals Rev., 1978, 22, (3), 112
NEW PATENTS: July 1978
t.d.k. electronics co. ltd. British Patent 1,508,091
Cl2 is produced free from O2 by the electrolysis of brine in the presence of an anode which is a conductive substrate (Ti, Ta or Zr) coated with a mixture of Pd oxide (5-40 mol.%), Ru oxide (2-10 mol.%), and Sn oxide (50-93 mol.%), of which up to 40 mol.% may be substituted by TiO2.
solario ltd. U.S. Patent 4,054,496
In the electrolysis of heavy water the electrodes may be of Ru, Rh, Pd, Os, Ir or Pt, or coatings of these metals on substrates of Ti, Nb or Ta.
semiconductor sensors inc. U.S. Patent 4,058,368
A device for the detection of hydrogen has a metal electrode made of Pd, Ni and/or Pt.
Noble Metal Catalyst for Oxygen Electrode
ELECTRODEPOSITION AND SURFACE COATINGS
a.m.p. inc. British Patent 1,499,163
The electroless deposition of Au on to a plastic surface is catalysed by the thermal decomposition products of a Pt or preferably Pd organo complex.
Vacuum Deposition of Ruthenium
inco europe ltd. British Patent 1,499,549
Ru is deposited on to a hot substrate, such as a cutting tool, from a complex RuL3, where L is a β-dicarbonyl compound.
Electroforming Meshes or Screens
e.m.i. ltd. British Patent 1,499,876
A mesh of Cu is obtained by electrodeposition into a grooved pattern scribed on a nonconductive substrate, the grooves being rendered conductive by a sputtered layer of Pd.
Metal Foil Production
imperial metal industries (kynoch) ltd. British Patent 1,504,360
Metal foils are obtained by electrodeposition on to a rotating anode of a platinum group metal from a consumable cathode of Cu or Au.
shipley co. inc. British Patent 1,507,730
Nonconductive substrates are sensitised for electroless plating by immersion in a solution of Pd chloride and stannous chloride. The plating solutions of base metal, Pd or Au are stabilised by S.
p.p.g. industries inc. U.S. Patent 4,065,626
Transparent substrates, such as glass, are provided with multiple coatings of Cu, Ni and Cu oxide in combination to give them a gold-coloured appearance and selective reflectance and transmittance properties for radiation over an extended spectral range. The layer nearest the substrate contains Pd.
Palladium Activator for Electroless Deposition Processes
LABORATORY APPARATUS AND TECHNIQUES
u.k. secretary of state for social services British Patent 1,503,908
A CO2 sensor, particularly suitable for monitoring the partial pressure of CO2 in a blood stream, has a sensing electrode of Pd-H or Ir-H, and a Ag reference electrode.
Platinum Catalyst for Detecting Combustible Gases
Platinum for Use as Braze Metal
union carbide corp. British Patent 1,500,924
Silicones prepared by the Pt-catalysed addition of aliphatically unsaturated epoxy compounds to hydrosiloxanes are used in emulsions for treatment of paper and textile fabrics.
Purification of I.C.E. Exhaust Gas
nissan motor co. ltd. British Patent 1,501,054
The air:fuel supply ratio to an I.C.E. provided with catalytic exhaust-gas purification means is monitored by an oxygen-sensor device using an electrolytic element coated with microporous layers of Pt.
Oxygenated Hydrocarbons Synthesis
union carbide corp. British Patents 1,501,891–2
Ethanol, acetaldehyde and acetic acid are obtained by reaction of CO with H2 in the presence of Rh, optionally in the presence of Fe, as catalyst.
I.C.E. Exhaust Gas Catalyst Support
u.o.p. inc. British Patent 1,502,882
A tension- and deformation-resistant ceramic catalyst support comprises a honeycomb formed by fusing and sintering together specially formed curved wall sheets, each set of walls being at about 120° with respect to adjacent walls. The support is coated with catalyst, of Groups I, V, VI or VIII, especially Pt, Pd, Cu, Ag, V, Cr, Fe, Co or Ni.
Battery Recombination Catalyst
robert bosch g.m.b.h. British Patent 1,503,736
A secondary battery includes a catalyst for recombination of H2 and O2. The catalyst consists of a carrier such as Al2O3 or Al silicate coated on its upper surface with a thin layer of Pd or Pt and then with a water-repellent material, such as porous PTFE.
chinoim gyokyszeres vegheszeti termekek gyarart British Patent 1,504,541
In the preparation of aminoacids from their derivatives, protective groups may be removed by hydrogenolysis in the presence of Pd/C.
Mo and W Bronzes for NOx Decomposition
johnson matthey & co. ltd. British Patent 1,507,976
Catalysts for the purification of air comprise a ceramic or metallic support carrying a bronze of general formula AxBOy, where A is a metal of Groups IA, IIA or the lanthanide group, Pb, Tl, Cu, Ni, H, NH4 or Ag; B is Ti, V, Nb, Mo, Ta, W, Re or Pt, x is 0–2 and y is 2–3.
Olefin Oxidation Catalysts
union oil co. of california U.S. Patent 4,057,575
Olefins are converted to esters or ethers by reaction with a carboxylic acid or alcohol and oxygen in the presence of a SiO2-supported catalyst which is a Group VIII noble metal, preferably Pt or Pd, and a non-noble metal redox agent.
Catalyst Containing a Platinum Group or Noble Metal
institut francais du petrole U.S. Patent 4,058,450
A catalyst for use in a process for preparing aromatic hydrocarbons from gasolines, free from olefin or diene consists of an alumina support, one or more halogens and at least two metals or their compounds chosen from the platinum group metals, such as Pt, Ir and Rh, and optionally an additional metal which may be Ag or Au.
Group VIII Metal Hydrogenation Catalyst
shell oil co. U.S. Patent 4,059,644
Group VIII metals such as Pt, Pd and Rh are used as hydrogenating catalysts in the second step of a 2-step process for preparing high density fuels from (meth)cyclopentadiene dimers.
Palladium Hydrogenation Catalyst
e. i. du pont de nemours & co. U.S. Patent 4,061,598
A catalyst of high activity and long life for use in the manufacture of H2O2 is obtained by impregnating Al2O3 with Pd under conditions such that the pore surfaces are rendered alkaline and the rate of metal diffusion is controlled.
general electric co. U.S. Patent 4,061,609
The curing of a vinyl-containing polysiloxane rubber is catalysed by not less than 0.1 ppm Pt.
Palladium Catalyst for Alcoholysis Reaction
sun ventures inc. U.S. Patent 4,064,180
The ionic alcoholysis of Binor–S, a 14C heptacyclic saturated hydrocarbon, in the presence of a primary alcohol, hydrogen and Pd/C or Pd/Al2O3 as catalyst yields new alkyl ethers of Binor–S for use as a high energy fuel.
Platinum or Palladium Coated Ribbon Catalyst
e. c. betz U.S. Patent 4,065,268
A catalyst bed, for use in converting hydrocarbon waste gas streams consists of catalytically active crimped metal ribbon, of at least two different crimp configurations. The ribbon may be coated with Pt and/or Pd as catalyst.
Palladium Hydrogenation Catalyst
texaco inc. U.S. Patent 4,066,699
Nitrated hydrocarbons, such as nitroparaffins, are reduced to amines using a Pd/C catalyst characterised by low ash and/or halide contents.
Noble Metal Catalyst for Coal Liquefaction Catalyst
battelle memorial institute U.S. Patent 4,067,795
Particles of solid hydrocarbonaceous material are electroplated with a metal catalyst, including Pt, Ag or Au, suspended in a hydrocarbon oil and subjected to hydrogenolysis to liquify them. The oil product is separated from the char/catalyst metal residue.
Platinum Group Metal Catalyst for Production of Hydrogen Rich Gas
continental oil co. U.S. Patent 4,067,958
A hydrogen-rich gas is produced from a fuel gas containing CO and N2 and/or methane by a two-stage process, the second stage of which uses a platinum group metal catalyst.
Platinum Group Catalyst for Hydrocarbon Conversion
u.o.p. inc. U.S. Patents 4,069,135–7
A multiple stage catalytic hydrocarbon conversion system uses gravity flowing catalyst particles which consist of a platinum group metal on Al2O3. Suitable metals are Pt, Ir, Rh and Pd. There are variations in the amount of catalyst used in each zone.
Platinum Group Metal Catalyst
atlantic richfield co. U.S. Patent 4,069,388
Oxalate esters are prepared by the oxidative carbonylation of an alkoxycycloalkene with CO, an alcohol and oxygen in the presence of an amine base and a metal salt, such as Pd, Pt or Rh, as catalyst.
Three-Way Control of an Exhaust Stream
general motors corp. U.S. Patent 4,071,600
The procedure involves contacting the exhaust gas with a Rh catalyst and contacting the gas with a Pt or Pd catalyst, without adding O2 to the exhaust gas.
Platinum Group Metal Catalyst for Terephthalic Acid Purification
johnson matthey & co. ltd. French Appl. 2,342,955
Terephthalic acid is purified by hydrogenation of the aldehyde impurities using a catalyst containing two metals chosen from Pt, Pd, Rh, Ru, Os and Ir. Other transition metals may also be present.
Rh/SiO2 for NOx Removal
johnson matthey & co. ltd. French Appl. 2,344,323
A process for removal of NOx and/or oxidation of hydrocarbons and CO uses as catalyst one or more of the platinum group metals, Au and Ag supported on or associated with SiO2, Al2O3 or mixtures thereof.
johnson matthey & co. ltd. German Offen. 2,722,771
The hydrogenation of animal and vegetable oils is catalysed by a product obtained by deposition on a porous particulate carrier of Pd bisacetylacetonate, and heating to deposit metallic Pd on the particle surfaces and in the larger pores only. The deposition is carried out in the vapour phase and the carrier may be maintained at a temperature above the decomposition temperature of the Pd compound.
uniroyal inc. German Offen. 2,736,228
p–Aminarylamines are obtained by hydrogenation or reductive alkylation of corresponding nitrosoarylamines in the presence of a platinum group metal sulphide, preferably 5% on C.
Supported Palladium Catalyst
johnson matthey & co. ltd. Dutch Appl. 77.05481
A supported Pd catalyst is prepared by the vapour deposition of a compound of Pd on to the surface of a solid porous particulate support in such a way that metallic Pd is deposited upon the outer surfaces of the particles and within the pore mouths only of those pores having a diameter greater than 50Å. The preferred support is powdered charcoal and the catalyst is useful for the hydrogenation of trienoic unsaturated fatty acids to the dienoic forms.
Ruthenium and Osmium Metallocenes as Dopants for Liquid Crystals
Fuel Cell Electrodes
shell international research mij b.v. British Patent 1,501,102
A catalytic Group VIII metal Pd, Rh, Ir, Os, Ru, Ni or preferably Pd is covered with a layer of H2 and then with a discontinuous layer of a cocatalyst metal which may be Ag, Au, platinum group metal, lanthanide metal or oxides thereof.
united technologies corp. British Patent 1,504,676
In a fuel cell which has electrodes of Pt black on PTFE, a porous electrolyte-retaining matrix comprises 95−98% of SiC particles having a size of < 10μm and 2−5% of binder.
Platinum Catalyst for Fuel Cell Electrode
kodak ltd. British Patent 1,500,278
Cationic complexes of Ru can be used at considerably lower concentrations than the Co and Cr complexes to improve the sensitivity and contrast of Ag halide photographic emulsions.
Fine-Gauge Wire Production
sumitomo electric industries ltd. British Patent 1,500,751
A hydrostatic extrusion process is used for producing wires of Pt or Au of diameter <250μm.
resource systems inc. U.S. Patent 4,056,373
A hydrogen-purification filter is a helical tubular coil of a Pd alloy.
fuji photo film co. ltd. U.S. Patent 4,063,000
The properties of Fe, Ni and/or Co ferromagnetic metal powders may be improved by 0.5−5% of Rh, Pd, Ag, Au or lanthanide metal.
johnson matthey & co. ltd. French Appl. 2,337,303
Apparatus for H2 storage comprises a membrane constructed of Pd or 20% Ag-Pd in gas-tight connection with a heat-exchange chamber containing an intermetallic compound capable of reversibly absorbing H2, for example LaNi5 for ambient temperature operation or Mg2Ni for operation at 250°C.
Platinum Metal/Porcelain Articles
national research development corp. U.S. Patent 4,064,311
Porcelain is fired on to a metal substrate, specifically a platinum group metal. The substrate already has an adherent layer of a metal oxide on its surface of Sn or In which is wetted by the fused porcelain.
Noble Metal-Containing Cermets
johnson matthey & co. ltd. French Appl. 2,336,358
The cermets consist of a ceramic particle phase and a metallic phase of Ru, Rh, Pd, Os, Ir, Pt, Au, Ag or their alloys, the greater part of the surface of the ceramic particles being treated with an additive which will form a solid solution with materials of the first and second phases.
ELECTRICAL AND ELECTRONIC ENGINEERING
philips electronic & associated industries ltd. British Patent 1,498,654
A layered rotary anode for an X-ray tube has an electron target area of W alloyed with Os, Ir, Pt, Ru, Rh or Pd.
nippon toki k.k. British Patent 1,499,524
Fluorescent display devices are produced using conductive pastes which contain a vehicle, binders, and finely divided Pt, Pd, Rh, Au or Ag.
asahi glass co. ltd. British Patent 1,504,654
A glass plate for a vehicle window is provided with electrodes of Ru oxide, a sensitive membrane of a metal orthophosphate covering the gap between the electrodes, and a screen-printed heating element of Pd, Pt or Ag.
corning glass works U.S. Patent 4,057,707
An electrical cooking or heating unit is a glass-ceramic plate heated by a strip of electrical-resistance alloy containing preferably about 5% Au, optionally 1−4% Rh, remainder Pt.
Palladium and Platinum Catalytic Anodes
w.c. heraeus g.m.b.h. British Patent 1,501,959
Thermal stresses in conventional Pt/ceramic resistance thermometers are reduced by depositing a layer having an intermediate thermal coefficient of expansion on to the substrate before depositing the Pt resistance layer. The intermediate layer is at least one of TiO2, ferric oxide and lanthanide metal(s) oxide.
Precious Metal Chips for Temperature Sensor
merck & co. inc. British Patent 1,502,740
Procedures for production of the title compounds, useful in treatment of rheumatoid arthritis, may include catalytic hydrogenation of a nitro-compound to the corresponding amine in the presence of Pd or Pt.
Tooth Crowning Process
o. w. rogers British Patent 1,502,813
The base of an impression of a tooth cavity is electrolytically coated with Pt, Pd, Rh, Au or an alloy thereof, the impression material is removed, and a porcelain inlay is built up on the metal base.