US5314854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable, high-yield reforming catalyst
Assignee: Honeywell UOP LLC
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Filing: 1992-11-12
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Granted: 1994-05-24
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Expires: 2012-11-12
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
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:31
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
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
36 words
A bed of catalyst particles for the conversion of hydrocarbons comprising: (a) a multigradient noble-metal component consisting essentially of uniformly dispersed platinum and surface-layer palladium; (b) a nonacidic large-pore molecular sieve; and, (c) an inorganic-oxide binder.
Claim 2
Dependent Claim
36 words
A bed of catalyst particles for the conversion of hydrocarbons comprising: (a) a multigradient noble-metal component consisting essentially of uniformly dispersed platinum and surface-layer palladium; (b) a nonacidic large-pore molecular sieve; and, (c) an inorganic-oxide binder.
Claim 3
Dependent Claim
38 words
The bed of catalyst particles of claim 1 wherein the concentration of surface-layer palladium 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 4
Dependent Claim
39 words
The bed of catalyst particles of claim 2 wherein the concentration of surface-layer palladium 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 5
Dependent Claim
17 words
The bed of catalyst particles of claim 1 wherein the nonacidic large-pore molecular sieve comprises nonacidic L-zeolite.
Claim 6
Dependent Claim
15 words
The bed of catalyst particles of claim 4 wherein the nonacidic L-zeolite comprises potassium-form L-zeolite.
Claim 7
Dependent Claim
13 words
The bed of catalyst particles of claim 1 wherein the binder comprises silica.
Claim 8
Dependent Claim
31 words
A bed of catalyst particles for the conversion of hydrocarbons comprising: (a) a uniformly dispersed platinum component and a surface-layer palladium component; (b) a nonacidic L-zeolite; and, (c) a silica binder.
Claim 9
Dependent Claim
31 words
A bed of catalyst particles for the conversion of hydrocarbons comprising: (a) a uniformly dispersed platinum component and a surface-layer palladium 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) | 1997-05-23 | 1997-11-22 | 1998-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-23 | 2001-11-22 | 2002-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-23 | 2005-11-22 | 2006-05-24 | $7700.00 | Window Closed / Lapsed |