Journal Archive

international nickel ltd British Patent 1,168,130

Articles for high temperature use in non-oxidising atmospheres consist of a core of Ir, Ru, W and Mo, a barrier layer and a coating of at least 95% Ir, Ru, W or Mo. The barrier layer between the core and coating consists of Au, Pd, Pd-Ag alloy or Pd-Cu alloy of specified composition.

citizen tokei k.k. U.S. Patent 3,444,012

Pt-Fe alloys of the super-lattice type are treated to improve their magnetic characteristics by cold-working and thermal-ageing.

deutsche gold- & silber-scheideanstalt Dutch Patent 69.00716

Materials comprising Pt group metal(s), Au or alloys thereof, together with an element having high O₂-affinity (preferably Zr) are dispersion hardened by internal oxidation by heating at 800−1200°C in an O₂-containing atmosphere for more than 5 h and preferably more than 20 h.

johnson matthey & co. ltd Swiss Patent 478,063

Electrolytic production of oxides of Pt and/or Pd or oxides of Pt and/or Pd mixed with oxides of other metals not harmful to the catalytic properties of the Pt and/or Pd oxides by electrolysis of appropriate Pt, Pd, Pt alloy or Pd alloy anode in a molten bath of alkali metal halide and nitrate. This corresponds to British Patent 1,106,814.

farbwerke hoechst a.g. British Patent 1,159,225

Metallic Pd is treated with O₂ (or air) in the presence of a carboxylic acid solution of a halide of a metal of Group Ia, IIa or IIIb or an ammonium halide at 10−150°C. The Pd used is Pd black. It becomes converted to Pd(II) halides.

imperial chemical industries ltd British Patent 1,160,765

Ru₃(CO)₁₂ is prepared by reaction of RuCl₃, Na naphthenate or Na acetyl-acetonate and a CO-H₂ mixture.

hercules inc. British Patent 1,164,561

Carbonyl compounds are produced by reacting an organic Group VIII noble metal compound with CO to form a CO derivative of the organic group. The Group VIII reactant is formed in situ, e.g., from p-carboxy-phenyl mercuric chloride and PdCl₂. The reaction of this with CO gives terephthalic acid.

lonza ltd British Patent 1,167,691

This new carbonyl compound Ru₆(CO)₁₈ is produced by heating trimeric Ru(CO)₄ at 150−250°C in a closed vessel. O₂ is absent, and p_CO is 0.2−2 atm.

lonza ltd U.S. Patent 3,446,591

A basic Ru carboxylate or Ru acetylacetonate is reacted with CO and H₂ at 150–200 atm in an organic solvent at 140−250°C to yield orange-red trimeric [Ru(CO)₄]₃.

rhone-poulenc s.a. U.S. Patent 3,449,387

Ru halides are reacted with organic nitriles to give complexes of the form RuX_mL_n, where X is halogen and L is a nitrile. These substances may be used as catalysts for dimerisation of acetonitrile.

ethyl corp. U.S. Patent 3,459,780

These Rh complex monohalides have the formula RhX(ZR₃)₃, where R is a 6−10C organic group, Z is P, As and/or Sb and X is a halogen. These compounds are used as chemical intermediates, oxidation catalysts and metal plating compounds.

ppg industries inc. British Patent 1,159,410

The overvoltage of a Pt metal coated Ti-base electrode is reduced by depositing metallic Bi on the Pt metal surfaces and heating to at least 200°C in a non-oxidising atmosphere.

leesona corp. British Patent 1,167,541

Electricity is generated from NH₃ in a cell where the catalyst consists of more than 50 at.% Pt with most of the remainder being a second Pt group metal, e.g., 93.8% Pt, 5.3% Ru, 0.9% Pb.

leesona corp. U.S. Patent 3,444,003

An electrode is made by depositing a layer of catalytic metal (Pt and Rh) from an aqueous solution of Pb and the catalytic metal on to a Pt foil or other base. This layer is followed by a second layer electrodeposited from a solution free from Pb so that the outer coating contains no Pb.

t. ishimatsu U.S. Patent 3,445,374

Each electrolytic Hg cell has a metallic cover, of which the inner face is coated successively with a layer of Ti and a layer of a Pt group metal (Pt, Rh, Pd and alloys) which serves as the anode in the cells.

allis-chalmers manufacturing co. U.S. Patent 3,446,725

In an electrolysis cell for the preparation of H₂ and O₂, a noble metal screen substrate (Pt, Pd, Rh, Ir, etc.) is interposed between an electrode of sintered Ni and the electrolyte matrix interfaces.

badische anilin- & soda-fabrik a.g. U.S. Patent 3,458,423

The anode has at least two porous layers of Ti, Ta or base alloys of these metals, the layers being arranged one above the other in the direction of the cathode, and the layer behind the layer facing the cathode is activated with a Pt group metal.

international business machines corp. British Patent 1,159,980

A metallising composition comprises a finely divided metal alloy (Ag-Pt or Ag-Pd or Ag-Pt-Pd) and particles of a vitrifiable flux (Pb Bi trioxide and Pb borosilicate glass) dispersed in a liquid vehicle.

burroughs corp. British Patent 1,164,776

A stable chemical plating bath which is based on the use of divalent Pd ions chelated with both EDTA and ethylenediamine and a reducing agent.

oronzio de nora impianti elettrochimici British Patent 1,167,992

A valve metal substrate such as Ti is plated with a Pt metal from an organic solution of a Pt metal complex of a compound having a −NH₃, −NH₄, −NH₂ or =NH group, e.g. (NH₄)₂PtCl₆.

union carbide corp. U.S. Patent 3,446,607

A graphite substrate resistant to oxidation up to 2000°C is provided with an adherent pore-free Ir coating, by applying finely divided Ir powder in a slurry, heating the substrate and Ir powder to produce a coating of sintered Ir, then vapour plating the sintered coating with Ir, and finally electrodepositing more Ir on top of this.

edwards high vacuum international ltd British Patent 1,159,494

The filamentary electron-emitting cathode of an ionisation gauge consists of a Pt-Rh alloy wire coated with a rare earth oxide of low work function.

beckman instruments inc. U.S. Patent 5,449,231

A polarographic cell for O determination includes an anode and a Rh cathode joined by an electrolyte and separated from the sample by a selectively permeable membrane.

ste nationale d’etude et constructions

de moteurs d’aviation U.S. Patent 3,442,006

A graphite member is welded or brazed to graphite or a refractory material by interposing between the two members a fixative layer containing refractory material and one of the Pt metals.

tenneco chemicals inc. British Patent 1,158,987

A chlorinated C₆H₅CH₃ mixture with an increased para-isomer content is produced by reacting C₆H₅CH₃ with Cl₂ in the presence of PtO₂ but in the absence of light or Fe.

farbenfabriken bayer a.g. British Patent 1,159,256

C₄-acetylenes or C₄-acetylene/butadienes in a butadiene containing C₄-fraction are selectively hydrogenated in the trickle-phase at high pressure in the presence of a fixed Pd/carrier catalyst. At least 20% of the catalyst support consists of Li Al spinel.

johnson matthey & co. ltd British Patent 1,159,967

Aromatic ketones or aldehydes are converted to the corresponding alcohol by hydrogenation on a Pd catalyst (5% Pd/C) in the presence of an amine (aniline, p-toluidine benzylamine, pyridine or quinoline).

standard oil co. British Patent 1,161,750

Liquid C₃H₈ and C₄H₁₀ and aromatics are produced from naphtha using a catalyst comprising 0.1−2 wt% noble metal such as Pt, 2−95 wt% mordenite, 0.05−5 wt% halogen such as Cl₂, and 5−98 wt% Al₂O₃.

knapsack a.g. British Patent 1,161,972

The oxidation of saturated aliphatic aldehydes to acids is catalysed by supported Pd metal, Pd oxide or Pd salt together with at least one other source of metal which includes Pt, Rh, Ru, Au and Ag.

institut francais du petrole des carburants et lubrifiants British Patent 1,162,397

The dehydrogenation of cyclohexanol and/or cyclohexane is catalysed by a substrate of SiO₂ supporting 0.1−2 wt% Pt, 0.05−1 wt% Ir and 0.5−3 wt% alkali or alkaline earth metal. The specific surface of the catalyst must be 100−300 m²g⁻¹ and the pore volume 0.7−1.1 ml g⁻¹.

shell internationale research

mij n.v. British Patent 1,162,969

Hydrocarbons are converted by contacting them at high temperature and pressure, in the presence of H₂, with a Pd/zeolite catalyst. The zeolite is specially treated to have an alkali metals content of < 1% and a molecular SiO₂/Al₂O₃ ratio 3–7.

kurashiki rayon k.k. British Patent 1,164,194

C₂H₄, O₂ and aqueous CH₃COOH are reacted over a metallic Pd catalyst, e.g., 0.1−5% Pd on a support, to give vinyl acetate, and CH₃COOH in a form suitable for recycling.

esso research & engineering co. U.S. Patent 3,442,973

Normal 4−8 C paraffins are isomerised on a catalyst comprising Au and Pd on an Al₂O₃ support. It preferably contains Pd in an amount representing 5−83 wt% of the Au present.

universal oil products co. U.S. Patent 3,448,165

Mono-olefines are produced from 10−18°C n -paraffin without skeletal rearrangement, by contacting at 400−600°C with an As-attenuated Pt catalyst on lithiated Al₂O₃ (0.05−5 wt% Pt). See also U.S. Patent 3,448,166.

chevron research co. U.S. Patent 3,449,237

A reforming process using a Pt-Re catalyst on a process support is started up by contacting the naphtha with the catalyst in the presence of an inert gas (N₂) at 650°F. Thereafter the catalyst temperature is increased to 900°F when a pressure of H₂ is built up.

universal oil products co. U.S. Patent 3,451,922

The olefines and dienes of pyrolysis gasoline are removed selectively to stabilise the product by (a ) hydrogenation of the heavier fraction over Pd and desulphurisation over Ni and (b ) bulking the fractions and hydrogenating over Pd.

chevron research co. U.S. Patent 3,453,204

An improved catalyst is produced by co-gelling or co-precipitating the hydrogenating and cracking components which consist of 50−90 wt% SiO₂, Al₂O₃ and 0.01−0.05 wt% of Pt, PtS, Pd or PdS.

national distillers & chemical corp. U.S. Patent 3,454,632

A process is provided for preparing haloacetyl halides from polyhalomethanes by reaction with CO in the presence of a Pt or Pd triad catalyst, and optionally, a promoter for the catalyst.

sinclair research inc. U.S. Patent 3,459,814

Hydroxy-containing diene polymers (e.g., H₂O₂-polymerised polybutadiene) are hydrogenated, using as a catalyst Pt supported on a large pore Al₂O₃, i.e., an Al₂O₃ having at least 0.22 ml/g of pore volume in pores above 500 Å.

celanese corporation British Patent 1,159,250

Organic compounds are partially oxidised in a system including a solution of Ru catalysts and an oxidising agent for maintaining the Ru in solution. The oxidation potential of the system must be maintained within the range represented by the values for Ru(V) and Ru(VII).

celanese corporation British Patent 1,159,528

C₂H₄ is converted to vinyl acetate in a redox system comprising an CH₃COOH solution of a salt of a Group VIII metal (a Pd(II) salt) a source of CH₃COO⁻ ions and Cl⁻ ions, Cu(II) ions and O₂.

imperial chemical industries ltd British Patent 1,159,950

The H atoms of hydrocarbons are replaced by Cl by contacting a hydrocarbon (acyclic paraffin, olefin, C₆H₆ and its homologues) with a mixture of molten LiCl and PdCl₂, (additionally KCe).

geigy (u.k.) ltd British Patent 1,165,286

Oligomers of butadiene and/or isoprene with methyl methacrylate are produced using a Ru catalyst (e.g., RuCl₃) in a 1−6 C alcohol.

shell oil co. U.S. Patent 3,444,145

C₂H₄ is oxidised to vinyl acetate in the presence of a Pt metal salt, e.g., PdCl₂ and a nitrogenous oxide compound, e.g., HNO₃ or a nitrate.

general electric co. U.S. Patent 3,448,072

A polyester and an isocyanate are contacted to provide for the introduction of aliphatic unsaturation into the polyester. This reaction takes place in the presence of a Pt catalyst (H₂PtCl₆, Pt-C₂H₄ complex, etc.) with a Si hydride-bearing hydrolysable radical to produce curable compositions of a polyester with terminal silylurethane groups.

shell oil co. U.S. Patent 3,448,159

C₂H₄ and SO₂ react in aqueous solution in the presence of a Pdhalide catalyst (PdCl₂) and a co-catalyst (halide ion, especially KCl) to yield ethyl vinyl sulphone.

union oil co. of california U.S. Patent 3,450,748

C₂H₄ is oxidised (O₂) in contact with a liquid phase containing a noble metal catalyst (PdCl₂) and a soluble halide. The products are separated and recovered.

shell oil co. U.S. Patent 3,454,644

Keto, nitrile, unsaturated and formyl compounds are hydrogenated in the presence of the Ru or Os complex of formula L_nMZ₂, where n is either 3 or 4, M is Ru or Os, Z independently is Cl, Br or H, and L independently is CO or tertiary phosphine with at least three L’s being tertiary phosphine.

imperial chemical industries ltd U.S. Patent 3,458,547

New catalysts for reactions involving unsaturated bonds have the formula IrH₃(PR₃)₂, where R is the same or different alkyl, aryl, arylky, alkenyl, cycloalkenyl, alkoxy, aryloxy or heterocyclic group. They are produced by the hydride reduction of IrY₂ (PR₃)₂, where Y is an anion.

united aircraft corporation British Patent 1,159,150

H₂ is recovered from H₂-containing feedstocks in a fuel cell in which the anode contains a dehydrogenation catalyst. A cathode membrane (of Pd-Ag alloy) is spaced from the anode. The cathode is selectively permeable to H₂.

leesona corporation British Patent 1,159,343

An electrochemical cell electrode comprises a porous metal (Ni) substrate with one surface in intimate contact with a catalyst layer. The latter consists of Pt black and a hydrophobic polymer (PTFE) uniformly distributed throughout the catalyst layer. See also British Patents 1,159,344–1,159,346.

tokyo shibaura electric co. ltd British Patent 1,165,679

The fuel cell has a H₂ electrode, composed of Pd or a Pd alloy of a Group IB metal or metals, which is coated on one side with Pt black and on the other side with a layer of Pd alloyed with Pt and/or Rh in the form of a “black”.

leesona corporation British Patent 1,167,542

Catalyst compositions for NH₃ fuel cells comprise 75−98 at.% Pt and 2−25 at.% Rh or Ru.

esso research & engineering co. U.S. Patent 3,443,998

The anode is an electrically conducting substrate coated with a physical mixture of Pt and Au. This is immersed in an anolyte containing Na molybdate dissolved in H₂SO₄.

chevron research co. U.S. Patent 3,449,169

Pt phosphide of high surface area is used as an electro-catalyst in fuel cells.

united aircraft corp. U.S. Patent 3,450,500

The catalytic (Ni) conversion of a mixture of H-containing carbonaceous feedstock and steam is effected close to a Pd membrane so that H₂ formed in the conversion is simultaneously abstracted to drive the equilibrium to increase H₂ production.

international nickel ltd British Patent 1,160,748

Articles and parts which come into contact with molten glass are made of an alloy containing 0.5−4% Ti, the remainder Pt.

j. gisbies East German Patent 66.003

The object to be clad is covered with a methanolic solution of platinic acid methyl ester. On evaporation of the solvent, a Pt mirror remains. The ester is prepared from the reaction between PtF₄ and methanol.

philips electronic & associated industries ltd British Patent 1,159,634

An ion-source comprises a porous W body forming a closure for a supply of alkali metal compounds. The body has a thin Os-Ir coating.

philips electronic & associated industries ltd British Patent 1,164,413

A cathode, e.g., for electric discharge tubes, is made with a porous W body filled with Ba compounds and coated with a thin porous layer of an Os-Ir or Os-Ru alloy. The Ir alloy can contain 30−70 at.% Os and the Ru alloy 20−80 at.% Os.

western electric co. British Patent 1,166,659

A metallic pattern is formed on a substrate by depositing a layer of Ti and then a layer of Pt, masking the surface and etching away the exposed Pt. The mask is then removed and Au applied to the remaining Pt pattern.

plessey co. ltd British Patent 1,166,992

The precursors of a ceramic glaze, plus Ru and/or Rh compounds, are added to a solvent to produce a solution or emulsion which is applied to a substrate. The film left after eliminating the solvent is fired to give a conducting film. A typical coating composition contains Pb stearate, Si resinate and Ru resinate in diacetonal alcohol.

e. i. du pont de nemours & co. U.S. Patent 3,450,545

The metallising compositions comprise 60−95% of a noble metal powder (Ag, Pd, Pt or Au), an inorganic binder powder and at least one oxide precursor (Rh, Ir, Ru, Cu, SiC or BN).

oronzio de nora impianti elettrochimici Dutch Patent 68.17957

A metal electrode base, e.g., produced from Ti, is coated with a mixture of semiconducting oxides. In an example, a coating of Ir, Ru and Ti metals is applied and then converted to the oxides. See also Dutch Patent 68.17966.