US5464800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable, high-yield reforming catalyst
Assignee: Honeywell UOP LLC
•
Filing: 1995-01-24
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Granted: 1995-11-07
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Expires: 2015-01-24
Abstract
Abstract A reforming process, selective for the dehydrocyclization of paraffins to aromatics, is effected using a bed of catalyst particles containing multiple Group VIII (8-10) noble metals having different gradients within the catalyst particles and a nonacidic large-pore molecular sieve. The use of this bed of catalyst particles results in greater selectivity of conversion of paraffins to aromatics and improved catalyst stability, particularly in the presence of small amounts of sulfur.
Inventors
- 👤 Leonid B. Galperin
- 👤 Paula L. Bogdan
- 👤 Edwin P. Boldingh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:50
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/095; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/064; B01J29/068; B01J29/60; B01J29/61; B01J29/62; B01J35/00; B01J35/19; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42; B01J35/30; B01J35/396; B01J35/397
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
29 words
A catalyst particle for the conversion of hydrocarbons comprising: (a) a multigradient noble-metal component comprising platinum and ruthenium; (b) a nonacidic large-pore molecular sieve; and, (c) an inorganic-oxide binder.
Claim 2
Dependent Claim
29 words
A catalyst particle for the conversion of hydrocarbons comprising: (a) a multigradient noble-metal component comprising platinum and ruthenium; (b) a nonacidic large-pore molecular sieve; and, (c) an inorganic-oxide binder.
Claim 3
Dependent Claim
16 words
The catalyst particle of claim 1 wherein the noble-metal component consists essentially of platinum and ruthenium.
Claim 4
Dependent Claim
17 words
The catalyst particle of claim 1 wherein the noble-metal component comprises uniformly dispersed platinum and surface-layer ruthenium.
Claim 5
Dependent Claim
17 words
The catalyst particle of claim 1 wherein the noble-metal component comprises uniformly dispersed ruthenium and surface-layer platinum.
Claim 6
Dependent Claim
37 words
The catalyst particle of claim 1 wherein the concentration of a surface-layer metal measured at the surface of the particles is at least twice the concentration of said metal in the central core of the catalyst particles.
Claim 7
Dependent Claim
38 words
The catalyst particle of claim 5 wherein the concentration of a surface-layer metal measured at the surface of the particles is at least three times the concentration of said metal in the central core of the catalyst particles.
Claim 8
Dependent Claim
15 words
The catalyst particle of claim 1 wherein the nonacidic large-pore molecular sieve comprises nonacidic L-zeolite.
Claim 9
Dependent Claim
13 words
The catalyst particle of claim 7 wherein the nonacidic L-zeolite comprises potassium-form L-zeolite.
Claim 10
Dependent Claim
11 words
The catalyst particle of claim 1 wherein the binder comprises silica.
Claim 11
Dependent Claim
29 words
A catalyst particle for the conversion of hydrocarbons comprising: (a) a uniformly dispersed platinum component and a surface-layer ruthenium component; (b) a nonacidic L-zeolite; and, (c) a silica binder.
Claim 12
Dependent Claim
29 words
A catalyst particle for the conversion of hydrocarbons comprising: (a) a uniformly dispersed platinum component and a surface-layer ruthenium component; (b) a nonacidic L-zeolite; and, (c) a silica binder.
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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) | 1998-11-06 | 1999-05-08 | 1999-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-06 | 2003-05-08 | 2003-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-06 | 2007-05-08 | 2007-11-07 | $7700.00 | Window Closed / Lapsed |