EP0306170A1
Expired / Lapsed
EP
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Process for dispersing or redispersing a group VIII noble metal species on a porous inorganic support
Assignee: Mobil Oil AS
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Filing: 1988-08-12
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Granted: —
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Expires: 2008-08-12
Abstract
Abstract In a process for dispersing or redispersing relatively large crystallites of Group VIII noble metal species on a porous inorganic support, the supported species is contacted with nitric oxide, either alone or in admixture with a source of halogen such as Cl₂, and thereafter any sorbed nitrogen oxide(s) and halogen are removed by purging with an inert gas. The treated metal-loaded catalyst demonstrates substantially increased benzene hydrogenation activity (BHA) compared to the same catalyst prior to treatment.
Inventors
- 👤 Yun-Yang Huang
- 👤 Rene Bernard Lapierre
- 👤 William Depaul Mchale
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 00:07
CPC Classifications
B; B01; B01J; B01J38/00; B01J38/04; B01J23/00; B01J23/38; B01J23/40; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/42; B01J29/44; B01J29/70; B01J29/72; B01J29/74; B01J29/7415; B01J29/90; B01J35/00; B01J35/30; B01J35/391; B01J35/393; B01J37/00; B01J37/12; B01J38/10; B01J2235/00; B01J2235/30
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
103 words
A process for dispersing or redispersing a Group VIII noble metal species present on a porous inorganic support which comprises: a) contacting a supported Group VIII noble metal species possessing an average crystallite diameter of at least about 25 Angstroms with nitric oxide at a temperature providing dispersion or redispersion of the noble metal species on the support, the support being a porous inorganic material from which at least a major amount of any carbonaceous matter which may have been present thereon has been removed prior to contacting with nitric oxide; and b) removing nitrogen oxide(s) from the supported dispersed/redispersed noble metal species.
Claim 2
Dependent Claim
103 words
A process for dispersing or redispersing a Group VIII noble metal species present on a porous inorganic support which comprises: a) contacting a supported Group VIII noble metal species possessing an average crystallite diameter of at least about 25 Angstroms with nitric oxide at a temperature providing dispersion or redispersion of the noble metal species on the support, the support being a porous inorganic material from which at least a major amount of any carbonaceous matter which may have been present thereon has been removed prior to contacting with nitric oxide; and b) removing nitrogen oxide(s) from the supported dispersed/redispersed noble metal species.
Claim 3
Dependent Claim
26 words
The process of Claim 1 wherein the noble metal species is at least one metal, oxide or sulfide of platinum, palladium, iridium, osmium, rhodium or ruthenium.
Claim 4
Dependent Claim
33 words
The process of Claim 2 wherein there is additionally present at least one non-noble metal selected from Group IB, Group IVB, Group VIIA or Group VIII of the Periodic Table of the Elements.
Claim 5
Dependent Claim
14 words
The process of any preceding claim wherein the porous inorganic support is a zeolite.
Claim 6
Dependent Claim
20 words
The process of Claim 4 wherein the zeolite is zeolite L, X, Y, Beta, ZSM-5 ZSM-11, ZSM-23, ZSM-35, or ZSM-48.
Claim 7
Dependent Claim
24 words
The process of any preceding claim wherein step(a) is effected with a mixture comprising nitric oxide and a minor amount of a gaseous halogen.
Claim 8
Dependent Claim
13 words
The process of Claim 6 wherein the mixture contains 0.01-5 volume percent chlorine.
Claim 9
Dependent Claim
13 words
The process of Claim 6 wherein the mixture contains 0.1-2 volume percent chlorine.
Claim 10
Dependent Claim
15 words
The process of any preceding claim wherein step(a) is effected at a temperature of 40-500°C.
Claim 11
Dependent Claim
10 words
The process of Claim 9 wherein said temperature is 200-400°C.
References Cited (Backward Citations)
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