US5883032A
Expired / Lapsed
US
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Selective multimetallic multigradient reforming catalyst
Assignee: Honeywell UOP LLC
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Filing: 1996-11-21
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Granted: 1999-03-16
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Expires: 2016-11-21
Abstract
Abstract A reforming process, selective for the dehydrocyclization of paraffins to aromatics, is effected using a catalyst containing a uniformly distributed platinum-group metal component, a surface-layer metal component comprising one one more of the Group IVA metals and indium and a nonacidic large-pore molecular sieve. The use of this bed of catalyst results in greater selectivity of conversion of paraffins to aromatics and in improved catalyst stability.
Inventors
- 👤 Paula L. Bogdan
- 👤 Qianjun Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:23
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/60; B01J29/61; B01J29/62; B01J29/064; B01J29/068; B01J35/00; B01J35/19; C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/095; B01J21/00; B01J21/12; B01J35/30; B01J35/396
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
71 words
A catalyst particle suitable for the reforming of hydrocarbons comprising: (a) a multigradient metal component comprising at least one uniformly distributed platinum-group metal and a surface-layer promoter-metal component selected from one or more of the group consisting of the Group IVA (IUPAC 14) metals and indium; (b) a nonacidic large-pore molecular sieve having a maximum free channel diameter of from 6 Å to about 8 Å; and, (c) an inorganic-oxide binder.
Claim 2
Dependent Claim
71 words
A catalyst particle suitable for the reforming of hydrocarbons comprising: (a) a multigradient metal component comprising at least one uniformly distributed platinum-group metal and a surface-layer promoter-metal component selected from one or more of the group consisting of the Group IVA (IUPAC 14) metals and indium; (b) a nonacidic large-pore molecular sieve having a maximum free channel diameter of from 6 Å to about 8 Å; and, (c) an inorganic-oxide binder.
Claim 3
Dependent Claim
42 words
The catalyst particle of claim 1 wherein the concentration of the promoter metal in the 100-micron surface layer of particles of the catalyst is at least about twice the concentration of said metal in the central core of particles of the catalyst.
Claim 4
Dependent Claim
42 words
The catalyst particle of claim 2 wherein the concentration of promoter metal in the 100-micron surface layer of particles of the catalyst is at least about three times the concentration of said metal in the central core of particles of the catalyst.
Claim 5
Dependent Claim
14 words
The catalyst particle of claim 1 wherein the noble-metal component consists essentially of platinum.
Claim 6
Dependent Claim
18 words
The catalyst particle of claim 1 wherein the multigradient metal component comprises uniformly distributed platinum and surface-layer tin.
Claim 7
Dependent Claim
19 words
The catalyst particle of claim 1 wherein the multigradient metal component consists essentially of distributed platinum and surface-layer tin.
Claim 8
Dependent Claim
18 words
The catalyst particle of claim 1 wherein the multigradient metal component comprises uniformly distributed platinum and surface-layer indium.
Claim 9
Dependent Claim
15 words
The catalyst particle of claim 1 wherein the nonacidic large-pore molecular sieve comprises nonacidic L-zeolite.
Claim 10
Dependent Claim
13 words
The catalyst particle of claim 8 wherein the nonacidic L-zeolite comprises potassium-form L-zeolite.
Claim 11
Dependent Claim
17 words
The catalyst particle of claim 1 wherein the binder comprises one or both of silica and alumina.
Claim 12
Dependent Claim
23 words
The catalyst particle of claim 1 contained in a bed of catalyst particles further comprising acidic catalyst particles in a physical particle-form mixture.
Claim 13
Dependent Claim
41 words
A catalyst particle suitable for the reforming of hydrocarbons comprising: (a) a multigradient metal component comprising uniformly distributed platinum and a surface-layer metal component selected from one or both of tin and indium; (b) potassium-form L-zeolite; and, (c) an inorganic-oxide binder.
Claim 14
Dependent Claim
41 words
A catalyst particle suitable for the reforming of hydrocarbons comprising: (a) a multigradient metal component comprising uniformly distributed platinum and a surface-layer metal component selected from one or both of tin and indium; (b) potassium-form L-zeolite; and, (c) an inorganic-oxide binder.
Claim 15
Independent Claim
102 words
A method of preparing a catalyst particle suitable for the reforming of hydrocarbons comprising: (a) compositing a nonacidic large-pore molecular sieve having a maximum free channel diameter of from 6 Å to about 8 Å and an inorganic binder to form a catalyst support; (b) incorporating a uniformly distributed platinum-group metal component and a surface-layer metal component selected from components of one or more of the group consisting of the Group IVA (IUPAC 14) metals and indium into the support to form a composite; and, (c) finishing the composite to form a catalyst particle by one or both of calcination and reduction.
Claim 16
Independent Claim
102 words
A method of preparing a catalyst particle suitable for the reforming of hydrocarbons comprising: (a) compositing a nonacidic large-pore molecular sieve having a maximum free channel diameter of from 6 Å to about 8 Å and an inorganic binder to form a catalyst support; (b) incorporating a uniformly distributed platinum-group metal component and a surface-layer metal component selected from components of one or more of the group consisting of the Group IVA (IUPAC 14) metals and indium into the support to form a composite; and, (c) finishing the composite to form a catalyst particle by one or both of calcination and reduction.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-03-15 | 2002-09-14 | 2003-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-15 | 2006-09-14 | 2007-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-15 | 2010-09-14 | 2011-03-16 | $7700.00 | Window Closed / Lapsed |