Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
289 words
A method of oxidizing gaseous substances, comprising: contacting the gaseous substances, at a relative humidity in the range 0 to. 100%, with a catalyst assembly at a temperature in the range -50 to 250°, the gaseous substance being at least one substance selected from the group consisting of carbon monoxide, aldehydes having carbon atoms in the range 1 to 5, ketones having carbon atoms in the range 3 to 5, and alcohols having carbon atoms in the range 1 to 5, the gaseous substance being contacted with the catalyst assembly in the form of a minor amount of a gaseous mixture comprising the gaseous substance, an inert gas therefor and an oxidizing gas therefor, the catalyst assembly comprising a) a hydrophobic, porous support of at least one substance having a surface area in the range 50 to 1000 m 2 /g and selected from the group consisting of carbons having a contact angle of at least 50° at a temperature of 25°C in an aqueous environment, crystalline silica (Sio 2 ) lattice essentially free of aluminum oxide in the SiO 2 lattice, silylated silica and styrene divinylbenzene polymers wherein the styrene monomers are of the formula in which A to E are at least one substituent selected from the group consisting of hydrogen and lower alkyl (C l to C 4 ) groups, and b) catalytically active metal on the support, the catalytically active metal consisting of at ' least one metal selected from the group consisting of.chromium, molybdenum, tungsten, manganese, rhenium, iron, ruthenium, osmium, cobalt, rhodium, iridium,nickel, palladium, platinum, copper, and silver, the amount of catalytically active metal being in the range 0.1 to 22 wt % of the total weight of the support and catalytically active metal.
Claim 2
Independent Claim
289 words
A method of oxidizing gaseous substances, comprising: contacting the gaseous substances, at a relative humidity in the range 0 to. 100%, with a catalyst assembly at a temperature in the range -50 to 250°, the gaseous substance being at least one substance selected from the group consisting of carbon monoxide, aldehydes having carbon atoms in the range 1 to 5, ketones having carbon atoms in the range 3 to 5, and alcohols having carbon atoms in the range 1 to 5, the gaseous substance being contacted with the catalyst assembly in the form of a minor amount of a gaseous mixture comprising the gaseous substance, an inert gas therefor and an oxidizing gas therefor, the catalyst assembly comprising a) a hydrophobic, porous support of at least one substance having a surface area in the range 50 to 1000 m 2 /g and selected from the group consisting of carbons having a contact angle of at least 50° at a temperature of 25°C in an aqueous environment, crystalline silica (Sio 2 ) lattice essentially free of aluminum oxide in the SiO 2 lattice, silylated silica and styrene divinylbenzene polymers wherein the styrene monomers are of the formula in which A to E are at least one substituent selected from the group consisting of hydrogen and lower alkyl (C l to C 4 ) groups, and b) catalytically active metal on the support, the catalytically active metal consisting of at ' least one metal selected from the group consisting of.chromium, molybdenum, tungsten, manganese, rhenium, iron, ruthenium, osmium, cobalt, rhodium, iridium,nickel, palladium, platinum, copper, and silver, the amount of catalytically active metal being in the range 0.1 to 22 wt % of the total weight of the support and catalytically active metal.
Claim 3
Dependent Claim
28 words
A method according to claim 1, wherein the gaseous substance is at least one substance selected from the group consisting of carbon monoxide, ethanol, methanol, 2-propanone and formaldehyde.
Claim 4
Dependent Claim
23 words
A method according to claim 1, wherein the surface area of the support is in the range 200 to 600 m 2 /g.
Claim 5
Dependent Claim
15 words
A method according to claim 1, wherein the support is of porous copolymerized styrene divinylbenzene.
Claim 6
Dependent Claim
54 words
A method according to claim 1, wherein the catalytically active metal comprises at least two metals selected from the group consisting of platinum, palladium, rhenium, osmium, iridium, cerium, nickel, rhodium and ruthenium, and one of the metals is present in the range 1:1 to 40:1 to that of the other metal or metals present.
Claim 7
Dependent Claim
49 words
A method according to claim 1, wherein the catalytically active metal is platinum and at least one metal selected from the group consisting of iridium and rhodium, one of the metals being present in the range 1:1 to 40:1 to that of the other catalytically active metal or metals.
Claim 8
Dependent Claim
17 words
A method according to claim 5, wherein platinum comprises one of the said at least two metals.