Platinum Metals Rev., 1965, 9, (3), 107
NEW PATENTS: July 1965
METALS AND ALLOYS
Production of Ultra Pure Hydrogen
johnson, matthey & co. ltd. British Patent 982,509
Ultra-pure H2 is produced from a gas or gaseous mixture by passing it through a diffusion cell, at 50-400 p.s.i.g. and 600-1000°F, consisting of a ceramic tube impregnated with an Ag-Pd alloy.
e. i. du pont de nemours & co. British Patent 982,789
An electrical resistor comprises a solid ceramic base and a conductive resistor composition applied on it and consisting of 20-49 wt.% glass frit matrix and 51-80 wt.% 0.5-50 μ particle size Pd and Ag, taken in a 55:45 to 45:55 ratio by wt., the said Pd containing 0.1-1 wt.% combined oxygen.
Production of Platinum-containing Metal Sheet or Strip
the international nickel co. (mond) ltd. British Patent 983,223
Pt-containing metal sheet or strip is produced by forming a laminated stack from at least 25 sheets, each 0.001-0.1 inch thick, at least some of which consist of or comprise Pt, bonding the sheets together by forging and rolling the product to a thickness no more than 1 /20 of the original stack, which may contain Pd, Rh or some other Pt group metal in addition to Pt.
Production of Assemblies Comprising Titanium
imperial chemical industries ltd. British Patent 984,973
Pt group metal or alloy plated Ti bodies are obtained by removing the surface skin of the Ti support and applying on it several coatings comprising Pt group metal compounds or their mixtures in an organic vehicle and firing each individual film in an oxidising atmosphere at 350-550°C.
Platinum Group Metal Sheet or Strip
the international nickel co. inc. U.S. Patent 3,166,417
Metal sheet containing 0.1-5 vol.% dispersed hard metal oxide phase is produced by mixing metallic flake powder containing up to about 50 wt.% Au, Ag, Ni and Cu and the balance essentially a Pt group metal, in particular Pt, Pd, Rh or their alloys, with an organic solvent solution of a metal salt decomposable to said metal oxide, e.g. Th nitrate, compacting the treated flake powder, sintering at a temperature of at least 800°C and working the sintered compact into a sheet.
Noble Metal Dental and Jewellery Alloy
nobilium products inc. German Patent 1,187,378
New alloy consists of 10-50% Au, 2-15% Ga, 2-5% Ru or Ir, remainder 40-70% Pd.
Platinum Laminate for Non-cutting Shaping
Production of Carbonyls
Electrodes for the Electrolytic Protection of Metal Parts
w. mattewman. British Patent 984,477
An electrode for the protection of metallic parts in contact with a potentially corrosive electrolyte consists of a Cu-cored Ti rod provided with a continuous or discontinuous thin Pt coating and encased in a sheath of perforated or porous plastic, which has a direct mating fit over the rod.
Catalyst Electrode for Anodic Oxidation
esso research & engineering co. British Patent 989,474
An anodic oxidation electrode for use in electrochemical cells consists of a substrate formed by a Pt screen welded to a Pt plate and a catalytically active Pt-Re coating formed by treating the electrode surface with a solution of a Pt and an Re salt followed by co-precipitation of the metals with a chemical reducing agent.
Gas Diffusion Electrode
ELECTRODEPOSITION AND SURFACE COATINGS
engelhard industries inc. British Patent 982,621
Au deposits are advantageously immersion-plated on to Cu substrates by a first immersion-plating of a thin layer of Pt, Pd, Rh or Ru, using a solution containing a halide or sulphamate of the metal and then immersion-plating an Au film by using a standard KAu(CN)2 plating solution.
Plating of Palladium and Other Metals of Group VIII
automatic telephone & electric co. ltd. British Patent 988,174
A chemical plating bath for the electroless plating of Group VIII metals, in particular Pd, comprises a pH 1-3.5 aqueous plating solution containing a source of metal ions in a complexed form and a source of sulphamate ions, e.g. sulphamic acid and Pd diamminodinitrite.
Palladium Decorating Compositions
engelhard industries inc. British Patent 989,463
An article is decorated with Pd by applying on it a composition comprising a fluid organic vehicle and a bisthioether palladous salt coordination compound, firing the film and then burnishing it to provide a soft lustrous finish.
Deposition of Metals of the Platinum Group
deutsche gold- und silber-scheideanstalt British Patent 990,174
Films of Pt group metals less than 1μ thick and greater than 600 Å in grain size are deposited on Mo, W, Ti, Zr, Ta, Ni or stainless steel by applying on the substrate an organic solution of a Pt group metal chelate of A-CH2-A, where A is CN and /or R-Co, and R is alkyl or alkoxy, evaporating the solvent and decomposing the chelate by 1-10 min at about 400°C.
sel-rex corp. German Patent 1,184,173
Thick, light-coloured Pt coatings are electrodeposited from a solution of Pt diaminodinitrite in an amount equivalent to at least 6 g/1 in H3PO4 and H2SO4.
Chemical Palladium Plating
Production of Organic Acetates
farbenfabriken bayer a.g. British Patent 981,987
Organic acetates are produced by reacting a 2-4C mono-olefine or lower alkylbenzene at 50-250°C with O2 and CH3COOH in the presence of Pd supported on a macroporous material and preferably at 2-200 atm.
Production of Aliphatic Percarboxylic Acids
les usines de melle. British Patent 982,490
Aliphatic percarboxylic acids are produced by reacting an aliphatic carboxylic acid in organic solvent and in the presence of a strong inorganic acid, cation exchange resin or an organosulphonic acid with alkyl anthraquinone hydroperoxide produced by the hydrogenation of the corresponding alkylanthraquinone in the presence of a supported Pd catalyst.
abbott laboratories. British Patent 984,516
Aromatic amino compounds are produced by hydrogenating a suitable nitro compound at 25-150°C, 1-150 atm and in the presence of 0.01-2 wt.% Rh catalyst, the activity of which as a ring-hydrogenation promoter is substantially exhausted.
Production of Alpha-olefinic Alcohols
institut francais du petrole, des carburants et lubrifiants. British Patent 984,916
α-Olefinic alcohols are produced by forming a 2-85 wt.% solution of 4-20C olefinic hydrocarbon α -hydroperoxide in a liquid hydrocarbon containing a hydrophilic solvent and contacting it with H2 in the presence of a catalyst obtained by treating Pd metal with an aqueous solution of Pb and/or Bi salt and a N-containing organic base.
Androstane and Androstene Derivatives
rhone-poulenc s.a. British Patent 984,980
The reaction of lβ-acetoxy-l7-oxoandrost-5-ene with alkylmagnesium halide followed by hydrolysis gives 1β,17β-dihydroxy-17x -alkyl-androst-5-ene, which can be hydrogenated with H2, in the presence of Adams Pt, to the corresponding androstane derivative.
Production of Halides of Unsaturated Aliphatic Acids or Derivatives thereof
imperial chemical industries ltd. British Patent 987,274
Unsaturated carboxylic acid halides are produced by contacting a compound containing C=C-C-X group, where X is halogen, with CO at 50-250°C, 50-3000 atm and in the presence of Pd or its complex or salt.
Preparation of Carboxylic Acid Halides
imperial chemical industries ltd. British Patent 987,516
Carboxylic acid halides are produced by reacting an organic aromatic compound with CO and halogen or with a carbonyl halide, at 200-250°C, 1-350 atm and in the presence of a catalytic amount of a Group VIII noble metal, in particular Pd or its compounds.
Purification of Olefine Polymers
cosden oil and chemical co. British Patent 987,640
A saturated liquid polymer obtained by polymerising 2-5C olefine gas fraction and containing polyisobutylene is purified by hydrogenating the mixture at 65-730°C, 1 atm to 210 kg/cm2 and in the presence of Pt, Pd or their compounds as catalyst.
the wellcome foundation ltd. British Patent 987,916
2,4-Diamino-6-hydroxy-7,8-dihydropteridine is produced by catalytic hydrogenation, in the presence of PtO, of 2,4-diamino-6-hydroxypteri-dine or 2,4-diamino-6,7-dihydroxypteridine.
Production of Hydroxy Benzaldehydes
rhone-potjlenc s.a. British Patent 987,947
The oxidation of a suitable hydroxybenzyl alcohol in an aqueous medium with inert gas-diluted oxygen and in the presence of a Pd catalyst produces m- or p-hydroxybenzaldehyde.
Production of 1,4-Cyclohexanedimethanol
eastman kodak ltd. British Patent 988,012
1,4-Cyclohexanedimethanol is produced by reacting a dialkyl terephthalate with H2 at 100-400°C, 50-500 atm and over a fixed bed catalyst containing 0.25-10 wt.% Pd, passing the effluent through a second hydrogenation stage using Cu chromite as catalyst.
Manufacture of Amines
monsanto co. British Patent 989,257
Amines are produced by heating, at below 350°C and in the presence of Pt group hydrogenation catalyst and optionally a H acceptor, a six-membered alicyclic ketone and an ammonia compound retaining at least one H on the N atm.
Treatment of Hydrocarbons
the british petroleum co. ltd.British Patent 989,269
A hydrocarbon feedstock containing alkyl aroma-tics is dealkylated by contacting it at 450-900°F, 50-1500 p.s.i.g. and in the presence of H with decationised zeolite Y supporting 0.1-5 wt.% Pt group metal, preferably Pd.
Catalyst for Exhaust Gas Oxidation
universal oil products co. British Patent 989,728
A catalyst for the oxidation of exhaust gases of combustion engines comprises a spherical inorganic oxide carrier having an apparent bulk density of 0.15-0.35 g/cm3 supporting 0.01-5 wt.% Pt group metal.
Novel Indole Derivatives and a Process for the Manufacture thereof
roche products ltd. British Patent 990,092
Pharmaceutically active hydroxylamino-indoles are produced from nitro-indoles, the catalytic reduction stage involving the use of a hydrogenated Pt oxide catalyst.
Preparation of Vinyl Esters
RHONE-poulenc s.a. British Patent 990,447
Vinyl esters are produced by reacting ethylene with 1-4C aliphatic carboxylic acid at 50-80°C, 10-100 atm and in the presence of a noble metal halide, e.g. PdCI2, p-quinone and an alkali metal salt of such an organic acid, separating the vinyl ester formed and the noble metal catalyst, reoxidising the diphenol produced to the quinone with O in the presence of carbon black supported Rh catalyst and using the regenerated p-quinone in further reaction.
universal oil products co. U.S. Patent 3,161,586
A continuous process for hydro-refining unsaturated, coke-forming hydrocarbon distillates utilises refractory metal oxide-supported Ru, Rh, Pd, Os, Ir, Pt or their mixtures as catalysts and is operated at 250-500°F.
Production of Benzimidazolinones
research laboratorium dr. c. janssen n.v. U.S. Patent 3,161,645
In the production of 1-(1-aroylpropyl-4-piperidyl)2-benzimidazolinones, the stage of catalytic hydrogenation to remove the benzyl group is carried out in the presence of Pd/C catalyst.
Carbonylation of Conjugated Diolefines
esso research & engineering co. U.S. Patent 3,161,672
Mono-olefinically unsaturated monoesters are produced by carbonylating 4-20C conjugated diolefines in a 1-20C alkanol solvent at 125-225°C, 500-3000 p.s.i.g. and in the presence of 0.001-5 wt.% Rh metal, oxide, nitrate or carbonyl.
Noble Metal Hydrogenation Catalysts in the Production of Substituted Pyrrolidines
geigy chemical corp. U.S. Patent 3,164,597
Phenyl-substituted pyrrolidine-2-carboxylic acids, -carboxylic acid esters and -carboxamides are produced by hydrogenation of the corresponding pyrroline compounds in the presence of Pt, Pd, Rh or PtO catalyst.
Production of Bis-nitrogen Heterocycles
california research corp. U.S. Patent 3,164,599
Bis-nitrogen heterocyclic compounds are produced by refluxing in the presence of a Pd hydrogenation catalyst, e.g. Pd/C, a N heterocycle boiling at 110-900°C.
Platinum Group Metal Hydrogenation Catalysts
allied chemical corp. U.S. Patent 3,164,630
Polymerisable salts of xylene diamines and dicarboxylic acids are produced by reacting to cyano compound and a dicarboxylic acid with H2 in the presence of Pd, Pt, Ru, Rh catalyst, so that xylene diamine and subsequently the desired salt are formed.
Cyanoethylation of Organosilanes
wacker-chemie g.m.b.h. U.S. Patent 3,167,573
Cyanoethyl-substituted silanes are produced by reacting acrylonitrile with a silane at 40-350°C and in the presence of a catalyst comprising Pt and aromatic nitrile, cyanoethylated amine, cyanoethylated acid amide or quinoidal pigments.
allied chemical corp. U.S. Patent 3,167,588
Unsymmetrical-dialkylhydrazines are produced by forming a slurry of nitrosodialkylamine, Pt or Pd supported on C, TiO2 or Al2O3 and H and feeding it through a reaction zone at 25-125°C, 10-1000 p.s.i.g. and then separating the catalyst at 70-120°C and 20-1000 mm Hg.
Production of Carbonyls
shell oil co. U.S. Patent 3,168,553
Carbonyl compounds are produced by reacting a 2-20C mono-olefinic hydrocarbon with CO at 75-250°C and 800-3000 p.s.i. in the presence of a catalyst consisting of Co, Ru, Rh and Ir in complex combination with Co and trialkyl phosphine.
sinclair research inc. U.S. Patent 3,168,587
4-8 C aliphatic hydrocarbons are dehydrogenated at 800-1300°F and 0.05-100 p.s.i.g. by introducing into the reaction vessel 0.01-10 mol.% O and a catalyst comprising a non-acidic refractory support carrying a minor proportion of a Pt group metal.
socony mobil oil co. inc. U.S. Patent 3,169,107
A hydrocarbon charge is subjected to hydro-cracking by contacting it under the usual conditions and in the presence of H with a catalyst comprising 25-75 wt.% SiO2, 0.05-10 wt.% Pt or Pd and the balance A12O3.
shell internationale research mij. n.v. French Patent 1,370,507
Ketenes are polymerised at 10-50°C by being contacted with a catalyst selected from PdCl2 or (Ar3X)2PdCl2, where Ar is an aryl, in particular phenyl, and X is P, As or Sb.
imperial chemical industries ltd. French Patent 1,372,516
Hydrocarbons boiling at 30-350°C are subjected to hydro-reforming at 470-700°C and 1-50 atm in the presence of a catalyst comprising a refractory metal oxide support, 3-80 wt.% Ni or Co and 0.001-0.5 wt.% Pt, Rh or Ru.
societa farmaceutici italia French Patent 1,372,742
(Dimethoxy- 3,4- phenyl) -1 -tert -butyl-2-amino-ethanol is produced by hydrogenating t-butyl-amine-ω-dimethoxy-3,4-acetophenone in aqueous solution, at 2-5 atm, at ambient temperature and in the presence of Pd/C catalyst.
Exhaust Gas Purifiers
deutsche gold- und silber-scheideanstalt French Patent 1,373,299
A purifier for combustion engine exhaust gases contains a first thin layer composed mainly of a noble metal, in particular Pt or Pd and a second thick, fluidised layer containing only a minor amount of such metal.
imperial chemical industries ltd. French Patent 1,375,869
Elastomeric compositions comprise 100 wt. parts diorgano-polysiloxane, 0.1-100 wt. parts another organosilicon compound, 0-10 wt. parts structure controlling agent, 0-150 wt. parts reinforcing filler, 0-200 wt. parts semi- or non-reinforcing filler and up to 0.2 wt. % Pt, Ru, Rh, Pd, Os or Ir.
Hydrocarbon Conversion Cataylsts
institut francais du petrole, des carburants et lubrifiants. French Patent 1,376,480
5-6C paraffins are converted to 3-4C paraffins by hydrogenating them at 350-450°C, 10-250 atm and in the presence of a Pt group metal catalyst, preferably Pt or Pd.
institut francais du petrole, des carburants et lubrifiants. French Patent 1,376,483
3-4C paraffins are obtained by subjecting 5-6 C paraffins to hydrocracking at 350-550°C, 10-250 atm and in the presence of a molecular sieve of about 6 Å pore size activated by 0.2-1 wt.% Pt group metal, preferably Pt or Pd.
Hydrogenation of Organic Compounds
union carbide corp. French Patent 1,376,744
Organic compounds are hydrogenated by contacting them with H2 and a catalyst obtained by reacting, at elevated temperature and in an inert liquid, Ru, Rh, Pd, Os, Ir or Pt with 10-20 molar excess of organosilicon possessing Si-H bonds, whereby the precious metal component is reduced to lower valency state, preferably zero.
Production of Enolic Ethers of 3-Keto-5α-androstanes
francesco vismara s.p.a. French Patent 1,377,260
Enolic ethers of 3-keto-5α-androstanes are produced by the hydrogenation of ethers of 3-hydroxy-androsta-3,5-dienes at 5-30°C, in an inert organic solvent and in the presence of a Pt or Pd catalyst on an inert support, preferably Pd/CaCo3.
Catalysts for Exhaust Gas Filters
w. r. grace & co. French Patent 1,377,737
Catalyst for the oxidative purification of exhaust gases of internal combustion engines are produced by impregnating a high specific surface area refractory oxide support, e.g. A12O3, to provide 3-15 wt.% CoO and 0.01-0.1 wt.% Pd, drying the material at I27°C and then calcining for 3-19 h at about 760°C.
Catalysts for Exhaust Gas Purification
w. r. grace & co. French Patent 1,377,776
Catalysts for the oxidative purification of exhaust gases of internal combustion engines are produced by impregnating a high surface area refractory metal oxide with solutions of Mn and Pd salts so that after 3-9 h calcination at 538-760° the catalyst contains 5-20 wt.% MnO2 and 0.01-0.1 wt.% Pd.
Vinyl Acetate Production
farbenfabriken bayer a.g. German Patent 1,185,604
The reaction of C2H4 and O2 is catalysed by a Pd catalyst on a macroporous support having an internal surface of less than 50 m2/g.
Tritium Introduction Catalyst
u.k. atomic energy authority German Patent 1,187,235
Tritium is introduced into tetrasodium-1,4-dihydroxy - 2 - methyl -1, - 4 - dihydronaphthalene -(l,4)-diphosphate using Pt or Pd hydrogenation catalysts.
Organosilicon Compound Production
imperial chemical industries ltd. German Patent 1,187,240
The reaction of silanes with organic compounds is catalysed by a Pt (II) salt complex with an olefine.
e. i. du pont de nemours & co. German Patent 1,187,243
Amines are produced from nitroaromatic compounds by reduction in the presence of a Pt catalyst and a cycloaliphatic N base.
Production of Dihydrotriazine
vitamins ltd. German Patent 1,187,626
4,6 - Diamino -1,2 - dihydro - 2,2 -dimethyl -1 -hydroxy-1,3,5-triazine is produced by hydrogenation of the corresponding unsaturated compound in the presence of a Pd catalyst.
sun oil co. German Patent 1,188,063
The aromatisation of methylcyclopentane is catalysed by a Pt catalyst, on an A12O3 support containing a halide, in the presence of NH3 or an amine.
RHONE-poulenc s.a. German Patent 1,188,069
The oxidation of hydroxybenzyl alcohols to the corresponding aldehydes is effected by O in aqueous-alkaline medium in the presence of a Pd catalyst.
Selective Acetylene Hydrogenation
snam s.p.a. Dutch Application 64.05,225
Water-miscible acetylenic compounds are hydrogenated selectively in an aqueous Zn salt solution in the presence of a Pd catalyst.
Production of Halohydrocarbons
imperial chemical industries ltd. Dutch Application 64.06,346
The reaction of alkenes with a halogen acid is catalysed by a mixture of a Pt metal and one of its compounds, e.g. Pt and chloroplatinic acid.
f. hoffmann-la roche & co. a.g. Dutch Application 64.07,001
A catalyst for ketone production consists of a Pd-Fe compound mixture.
Carboxylic Acid Production
leesona corp. British Patent 986,837
A porous reducing electrode for fuel cells is formed of 1-100μ particle size powder of a Pd alloy containing 0.25-10 wt.% Ag.
Precious Metal Fuel Cell Electrodes
shell research ltd. French Patent 1,374,387
Improved microporous electrodes for fuel cells may consist of a microporous substrate which has been coated with a thick film of Pd, Pt, Os, Ir, Rh or their alloys, which may be further thickened by application over almost the entire surface of another metal selected from the same group.
Fuel Cell Electrode
siemens-schuckertwerke a.g. Dutch Application 64.06,694
A porous ferromagnetic electrode core is used and the catalytic metal, e.g. Pt, is introduced by magnetic forces.