Platinum Metals Rev., 1987, 31, (1), 48
NEW PATENTS: January 1987
Corrosion Resistant Pt Alloys
tokuriki honten k.k. Japanese Publ. Appl. 61/76,634
A high melting point, corrosion- and oxidation-resistant Pt alloy consists of Pt, Ru, Fe, Cr and Co. Ir is used in electrodes, nozzles and medical equipment.
Magnetic Powder for Recording
hitachi maxell Japanese Publ. Appl. 61/105,806
Ru, Rh, Pd, Ir, Pt and/or Cu are added to γ -ferric oxide to produce a magnetic powder which is used as a magnetic recording medium. The noble metal acts as a catalyst for a H reduction reaction to increase the reduction speed.
Opto-Magnetic Recording Medium
nec corp. Japanese Publ. Appl. 61/107,555
The medium has an axis of easy magnetisation perpendicular to the film surface, and has a recording layer of a magnetic alloy containing a rare earth metal, an Fe group transition metal and Pt.
Magnetic Recording Medium
Luminescent Chelate Labels
hyperion catalysis World Patent Appl. 86/2,734A
A new chemical moiety containing Ru or Os can be induced to emit electromagnetic radiation by exposing it to chemical or electrochemical energy. It may be used for rapid, efficient and sensitive determination of chemical, biochemical and biological materials, and act as a chelate label.
Palladium Co-ordination Complexes
research corp. U.S. Patent 4,598,073
New polycyclo-Pd(II)-bipyridine complexes are claimed. They can be used as anti-tumour agents and are useful as homogeneous or heterogeneous catalysts and as intermediates in organic syntheses.
Iridium Hexafluoride Production
oronzio de nora impianti European Appl. 183,100A
An electrode for electrolytic production of H2 and alkali metal hydroxide comprises a conductive inert metal substrate, a pre-coating of ceramic particles in a metal matrix of Fe, Ni, Ag, etc., and an electrocatalytic ceramic coating of one or more of Pt, Pd, Rh, Ir, Ru, Ti, Zr, Hf, etc.
Electrode for Electrochemical Cell
oronzio de nora impianti World Patent Appl. 86/3,790A
An electrode resistant to Fe and Hg poisoning, comprises an electroconductive support coated with (a) metal alloy dispersed electrocatalytic material (b) platinum group metal alloy in homogeneous phase. The electrocatalytic material in (a) can be a platinum group metal, Ti, Zr, Tb as oxides, borides, etc., but is preferably Ru oxides, and for (b) RuCl3.
johnson matthey p.l.c. World Patent Appl. 86/4,364A
The manufacture of a PTFE modified electrode with a Pt, Pd, Ru, or Rh electrocatalyst, and a metal substrate is claimed. The electrode has reduced over-potential and is especially used as a chloralkali cathode. The process does not require the polymer to be fused, and the electrocatalyst is more effective.
Ruthenium Electrolysis Electrode
l. i. yurkov U.S. Patent 4,589,969
An electrode for electrolysis consists of a substrate of passivated metal, with a mixed oxide coating of Ru, Ti and Sn. The electrode is useful in chloralkali cells, in a Hg cathode electrolyser, in chlorate production and in waste water treatment. It has low resistance, and is simply made.
Amorphous Alloy Electrode
daiki gum kogyo k.k. Japanese Publ. Appl. 61/67,732
A surface activated amorphous alloy for solution electrolysis consists of P, Si, and/or B, at least one of Ru, Rh, Ir and/or Pt and at least one of Co, Ni and/or Cu, etc. The alloy is used for electrolysing metal halide solution; it has long life, and can save energy.
Gas Diffusion Electrode
asahi glass k.k. Japanese Publ. Appl. 61/130,497
The electrode has an electrically conductive porous base body of powdered C black with a metal colloid of platinum group metal or alloy, or Ag. It has improved durability and lower overvoltage.
Oxide Film Formation
hitachi k.k. German Offen. 3,600,575
A process for oxide film formation on Pt, Pd, Ir, Rh or Ru for pH electrodes involves ion implantation with O ions.
ELECTRODEPOSITION AND SURFACE COATINGS
shipley co. inc. European Appl. 187,962A
High activity electroless deposition catalysts of platinum group metals are produced by reducing solutions of the platinum metals with an organic suspending agent which forms a complex with the metal.
Coated Metal Carbide Boring Tools
smith international inc. Japanese Publ. Appl. 61/82,959
Steel tools for boring underground have hard tips of improved durability of metal carbide buried in the steel. The tips are coated with Rh, Ir, Os, Ni, Ti, W, Nb, Mo or Cr and their alloys.
siemens a. g. German Offen. 3,443,420
A quick precipitating electrolytic bath for producing bright crack-free coatings of Pd alloys does not contain a brightening agent, S or C, which leads to a lower contact resistance. There is little increase in resistance after corrosion or tempering. The coatings have good ductility.
Palladium Electrodeposition Bath
LABORATORY APPARATUS AND TECHNIQUE
Gas Flow Measurement
nippon soken k.k. U.S. Patent 4,587,843
A gas flow apparatus with no hot wires and with high resistance to vibration has a sensing circuit with a mica plate on which thin Pt and Pt-Rh deposits are formed by vacuum deposition.
nissan motor k.k. Japanese Publ. Appl. 61/79,155
An O2 sensor has a catalyst of 1−3:1 of γ -Al2O3 and Ce oxide on which at least two of Pt, Pd and Rh are deposited. The sensor is used for controlling air: fuel ratios for I.C.E.; it has improved high temperature durability and the effect of Pb is minimised.
tokuriki honten Japanese Patent 86/23,472
A multilayer crucible for furnaces is made by draw-forming, thin sheets of laminated Pt-Au.
Impurity Detector for Water
v. e. kazarinov Russian Patent 1,157,940
Inorganic impurities in industrial water are measured by passing rectangular pulses from a Pt electrode held at a potential through the water in an electrochemical cell. The impurity content is measured from the difference between the quantity of electricity between a first measured pulse and a second.
Conductimetric Detector Cell
Laminated Composite Solder
tanaka kikinzoku kogyo Japanese Publ. Appl. 61/82,996
A laminated composite solder material comprises Ti strip coated with Pt, Pd, Au or Ag and lapped with and bonded to a brazing strip. The coating protects the Ti from oxidation; it is used for brazing ceramic to ceramic or ceramic to metal.
ngk spark plug k.k. Japanese Publ. Appl. 61/127,676
Ceramics are joined together or to metal in metallised joining places using a composition of ceramic and Pt, Ir, Rh, Pd or their alloys as metal powder for burning in oxidative atmospheres; or Pt, Ir, Rh, Pd, Ru, Os, W, Mo, Fe, etc., or their alloys for joining in vacuum or in a reductive atmosphere.
pro-catalyse European Appl. 181,802A
A Pt catalyst for I.C.E. exhaust purification has at least 50wt.% of its filler and binder as Al2O3. After 30 minutes use <1% of the catalyst has been lost.
Deuterated Methyl Methacrylate
mitsubishi rayon k.k. European Appl. 186,106A
Deuterated methyl (meth)acrylate is produced by direct substitution of D for H present, in the presence of preferably a platinum group metal element or compound, using D2O or D2. The deuterated products are used for optical fibre manufacture and give a major improvement in the light transmitting ability.
Carboxylic Acid Production
du pont de nemours co. European Appl. 188,209A
Linear saturated carboxylic acids are produced with high selectivity from unsaturated monocarboxylic acid with CO and H2O in the presence of Rh.
shell int. res. mij. b.v. European Appl. 188,304A
Hydrocarbons are produced by passing a CO/H2 mixture with a hydrocarbon liquid, especially a residue from hydrocracking, over a Co-Ru catalyst optionally containing Zr, Ti or Cr.
Catalytic Dewaxing of Hydrocarbons
mobil oil corp. European Appl. 198,898A
Hydrocarbon feeds are catalytically dewaxed in 2 stages, each with catalysts, which preferably contain a Group VIII metal, especially Pt or a Group VI, VII and/or VIII non-noble metal, but on different zeolites.
Production of Higher Carbonyls
british petroleum co. World Patent Appl. 86/4,057A
High carbonyls are prepared by the reaction of 1-8C cyclic alcohols using a supported Ru(oxide). An alcohol with at least one more C than the reactant alcohol is also produced.
eastman kodak co. U.S. Patent 4,587,364
An Os-Co catalyst with Os:Co=1−1000:10−1 is used for olefin hydroformylation to aldehydes. The catalyst gives aldehyde products with low normal: branched molecular ratios in high yields and at low catalyst concentrations, without complexing agent.
Hydrogen Generation from Water
cardinal e. v. U.S. Patent 4,588,577
A finely divided catalyst of Pt, Pd, Ni, Co, Fe, Cu, Mg, Mn or their alloys is mixed with H2O at 60−150°C and a chelating agent to produce H2. Fossil fuel may be added to the H2 and the mixture combusted.
uop inc. U.S. Patent 4,595,673
Li and K are added to a Pt and Sn catalyst on an Al2O3 support which also contains a Group IVA element to improve its performance in hydrocarbon conversion processes, especially dehydrogenation.
Selective Hydrogenation Catalyst
phillips petroleum co. U.S. Patent 4,596,783
A catalyst for selective hydrogenation of acetylenic compounds consists of Pd, Pb acetate and an aromatic amine oxide on a CaCO3 support.
I.C.E. Purification Catalyst
toyota jidosha k. k. Japanese Publ.Appl. 61/64,337
A catalyst with improved durability and activity can remove 93%HC, 89%CO and 91%NOx from engine exhaust. Catalysts Pt, Pd, Ir, Rh, Os, Cr, Ni, V or Cu are loaded onto a monolithic base material having micropores, in water. The catalyst is added via a slurry.
Heat Resistant Catalyst
cataler kogyo k.k. Japanese Publ.Appl. 61/78,439
An I.C.E. catalyst for noxious gas removal from exhaust gas includes an inner Al2O3 layer impregnated with Ce, Y, Nd, etc., and an outer layer impregnated with Ce, etc. The catalyst contains Pd-Rh and has improved heat resistance.
Hydrocyanic Acid Preparation
mitsubishi chem. ind. k.k. Japanese Publ. Appl. 61/86,416
HCN acid is prepared over a Pt-Rh alloy catalyst containing 20 wt.% Rh at 500−800°C by reacting acetonitrile with O2 in the presence of NH3.
matsushita elec. ind. k.k. Japanese Publ. Appl. 61/86,944/5
A catalyst for detoxifying CO and HC in exhaust from combustion furnaces and domestic ovens contains Ca aluminate and delafossite type composite metal oxide which is composed of Pt, Pd, Rh, Ag, Cu, La, Al, Cr, Ga, etc.
Palladium Coke Oven Catalyst
kawasaki steel k.k. Japanese Publ.Appl. 61/89,294
A Pd catalyst containing almost no Cl is used to hydrogenate unsaturated hydrocarbons and O2 in coke oven gas.
Catalytic Combustion Chamber
toyota jidosha k.k. Japanese Publ.Appl. 61/97,031
Part of a catalytic combustion chamber has a heat resistant inorganic material containing one or more transition metals which is coated with a layer of platinum group metal catalyst. The assembly is used in a diesel combustion engine.
Diesel Exhaust Purification
nippon shokubai kagaku Japanese Publ. Appl. 61/120,640
A catalyst for purifying engine exhaust comprises V or V compounds and Pt, Pd, Rh or their compounds, possibly with other metals or their compounds. The catalyst converts 98%CO and 84% HC at 350°C.
Carbon Monoxide Oxidation
Production of Palladium-Tin Colloidal Catalyst
i.b.m. inc. U.S. Patent 4,593,016
A Pd-Sn colloidal catalyst concentrate is produced from stannous chloride dissolution in HCl acid, and then mixing this with PdCl2 solution.
union carbide corp. U.S. Patent 4,594,463
Aldehydes are prepared by reacting a primary alcohol with a CO/H2 mixture at 100−300°C above atmospheric pressure in the presence of a catalyst of a soluble Rh compound, an I-containing compound and a chelating compound. The catalyst is stable and has high activity and selectivity for aldehydes.
Dimerisation of Aliphatic Olefins
shell oil co. U.S. Patent 4,599,476
A catalyst system of a Pd compound and/or a Ru compound in aprotic organic solvent is used to dimerise aliphatic 2−12C mono-olefins to dimers.
Noble Metal Organo Sol
Electricity Generation from Hydrogen
johnson matthey p.l.c. World Patent Appl. 86/3,479A
An easily installable and removable catchment pack to trap oxidised Pt from an NH3 oxidation plant comprises Pd and Au alloy getter wires protected by stainless steel gauze supports.
sanyo electric k.k. Japanese Publ. Appl. 61/127,865
Platinum group metal oxide film production involves introducing the gaseous metal fluoride and O2 and/or O compounds into a reaction vessel, followed by plasma CVD. The film forms on the base plate and is used as a solar battery transparent electrode.
Optical Glass Forming Die
ELECTRICAL AND ELECTRONIC ENGINEERING
s.t.c. p.l.c. British Appl. 2,168,381A
Electrical contacts for printed wiring boards comprise a non-corrodible alloy layer preferably of Pd-Ni, formed on a base metal surface, with a Au outer layer. The Pd-Ni contains 70−85% Pd and is 2μ m thick.
alps electric k.k. Japanese Publ. Appl. 61/16,977
Thick film circuit conductive paste for hybrid I.C. is composed of Au resinate, Pt or Au resinate + Pd resinate, and Bi resinate, and Ti or Co resinate mixed with a vehicle.
Printed Circuit Board
hitachi chemical k.k. Japanese Publ. Appl. 61/66,307
A glass printed circuit board contains 0.50−3.00% Pd and/or Pt. The metal transfers the high-frequency signal, and the amount of Pd and Pt is reduced as compared with the conventional method.
Thin Film Manufacture
kureha chem. ind. k.k. Japanese Publ. Appl. 61/75,511/77,316
Pt, Mn and Sb are simultaneously, sputtered onto a substrate, to form a thin film. The material is used for recording, reproducing and erasing information by laser. A temperature of 100°C or more improves crystallisation. The thin film is useful as an optomagnetic disc medium.
Electrically Conductive Polyester Fibre
nippon ester k.k. Japanese Publ. Appl. 61/89,370
An electrically conductive polyester fibre is prepared for plating, then dipped in aqueous solution containing 0.15−15 ppm Pd and kept at 60−95°C. This activated fibre is then plated with Cu, Co, Cr, Ag, etc.
Sliding Contact Device
tanaka kikinzoku kogyo Japanese Publ. Appl. 61/109,277-84
A sliding contact consists of a brush composed of a Au-Pt-Ag-Cu alloy with other elements, and a commutator or slip ring of Ag alloy with Cu, Cd, etc., added. There is little abrasion wear of the brush and slip ring and contact resistance is low and stable. Oxides produced during sliding act as lubricants.
Metallised Glass Fibre
Fast Temperature Probe
g. barker & co. British Appl. 2,167,603A
A fast accurate temperature sensing probe has a Pt resistance coil wound on a ceramic core in a heat conductive compound. The assembly is enclosed in a sealed can, and used in refrigerated display cabinets.
Measuring Temperature Hysteresis
nippon teleg. & teleph. Japanese Publ. Appl. 61/86,623
The temperature hysteresis of a body is measured by laminating a Pt film to part of one surface of it, laminating a Au film to the Pd and then measuring the resistance before and after heating. This can be used at 300−700°C and for fast moving bodies.
johnson matthey p.l.c. European Appl. 181,166A
A new 1, 1-cyclobutane-di:carboxylate-di:ammine Pt inclusion compound with α -cyclo-dextrin is an anticancer compound with greater solubility in H2O than the parent compound and much lower toxicity than Cisplatin. The side effects are reduced.
New Platinum Complexes
american cyanamid co. European Appl. 185,225A
Pt complexes with aliphatic tri-carboxylic acid compounds are used for inducing regression and/or palliation of leukaemia and related cancers, lung carcinomas and mammary tumours, etc.
Transition Metal Complexes
johnson matthey inc. European Appl. 186,363A
A new charged dye transition metal complex with anti-tumour activity and radiosensitising activity contains as the metal preferably a platinum group metal, especially Pt(II). The complex formed between rhodamine-123 and Pt(II) is specifically claimed.
Monomeric Platinum Transferring Complex
r.l. stjernholm U.S. Patent 4,590,001
A monomeric Pt complex is formed by reacting cis-diammine-dichloroplatinum(II) and Fe-free human transferrin in the presence of cysteine. The complex selectively kills breast cancer cells without damaging normal cells.
New Bone Formation
univ. of california U.S. Patent 4,596,574
A biodegradable porous ceramic system for delivering morphogenic protein to induce new bone formation comprises a novel composition containing a cation of Pt, Na, Ag, K, Ca, etc., and an anion of phosphate, sulphate, carbonate, etc.
matsushita elec. ind. k.k. Japanese Publ. Appl. 61/91,558
A biosensor for analysis of substances in body fluids, comprises a base insulator, a Pt electrode system, a porous support containing redox enzyme and an electron acceptor and filter layer.
Blood Gas Sensor
sumitomo elec. ind. k.k. Japanese Publ. Appl. 61/128,945
A sensor for simultaneously and accurately determining O2 and CO2 concentrations in the blood comprises a pH, a Ag/AgCl and a Pt or Au electrode.
Platinum Anti-Cancer Agents
ceskoslovenska akad. ved. German Offen. 3,539,951
New macromolecular Pt complexes are anti-tumour agents which gradually decompose in vivo releasing active low molecular weight complexes which give long lasting levels of Pt in the blood, and low levels in the kidneys, liver, spleen and muscles.
k. korber German Offen. 3,447,413
A dental alloy is exclusively made from 0−15%Pt, 1−30% Pd, 0.1−15% Ir, the rest Au. No oxide layer is formed on fixing to ceramic; bonding agents may be melted onto the metal.
a.s. u.s.s.r. electrochem. Russian Patent 1,194,425
Organisms poisoned by urea, bilirubin, NH3, ethanol, CO, medicine overdoses, etc., can be detoxified more rapidly than current procedures by injecting a NaOCl solution produced by electrolysing NaCl using Pt-promoted Ti electrodes intravenously, which yields O to oxidise the toxins.
The New Patents abstracts have been prepared from material published by Derwent Publications Limited.