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US5017541A
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Catalyst for the isomerization of alkanes
Assignee: Honeywell UOP LLC
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Filing: 1990-06-27
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Granted: 1991-05-21
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Expires: 2010-06-27
Abstract
Abstract An improved catalyst particle is disclosed for the conversion of hydrocarbons which comprises a refractory inorganic-oxide support, a Friedel-Crafts metal halide, and a surface-layer platinum-group metal component, wherein the concentration of platinum-group metal component on the surface layer of each catalyst particle is at least 1.5 times the concentration in the central core of the catalyst particle. An isomerization process also is disclosed which is particularly effective for the conversion of C 4 -C 7 alkanes.
Inventors
- 👤 Robert J. Schmidt
- 👤 Robert S. Haizmann
- 👤 Mark R. Ford
- 👤 C. David Low
- 👤 Frank H. Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:10
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01J27/00; B01J27/06; B01J27/08; C; C07; C07C; C07C5/00; C07C5/22; C07C5/2206; C07C5/226; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/085; C07C2523/00; C07C2523/38; C07C2523/40; C07C2527/00; C07C2527/06; C07C2527/08
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
75 words
A catalyst particle comprising a refractory inorganic-oxide support, from about 1 to 15 mass % of a Friedel-Crafts metal halide and from about 0.01 to 2 mass % on an elemental basis of a surface-layer platinum-group metal component, wherein the concentration of platinum-group metal component on the surface layer of the catalyst particle is at least 1.5 times the magnitude of the concentration of platinum-group metal component in the central core of the catalyst particle.
Claim 2
Dependent Claim
75 words
A catalyst particle comprising a refractory inorganic-oxide support, from about 1 to 15 mass % of a Friedel-Crafts metal halide and from about 0.01 to 2 mass % on an elemental basis of a surface-layer platinum-group metal component, wherein the concentration of platinum-group metal component on the surface layer of the catalyst particle is at least 1.5 times the magnitude of the concentration of platinum-group metal component in the central core of the catalyst particle.
Claim 3
Dependent Claim
16 words
The catalyst particle of claim 1 wherein the surface layer is about 100 microns in depth.
Claim 4
Dependent Claim
16 words
The catalyst particle of claim 1 wherein the surface layer is about 150 microns in depth.
Claim 5
Dependent Claim
24 words
The catalyst particle of claim 1 wherein the diameter of the central core is about 50% of the volume diameter of the catalyst particle.
Claim 6
Dependent Claim
23 words
The catalyst particle of claim 1 wherein the diameter of the central core is about 50% of the diameter of the catalyst particle.
Claim 7
Dependent Claim
13 words
The catalyst particle of claim 1 wherein the refractory inorganic oxide comprises alumina.
Claim 8
Dependent Claim
14 words
The catalyst particle of claim 1 wherein the Friedel-Crafts metal halide comprises aluminum chloride.
Claim 9
Dependent Claim
15 words
The catalyst particle of claim 1 wherein the platinum-group metal component comprises a platinum component.
Claim 10
Dependent Claim
27 words
The catalyst particle of claim 1 further comprising an organic polyhalo component in an amount to add at least 0.1 mass % combined halogen to the catalyst.
Claim 11
Dependent Claim
13 words
The catalyst particle of claim 9 wherein the polyhalo component is carbon tetrachloride.
Claim 12
Dependent Claim
65 words
A catalyst particle comprising alumina, from about 1 to 15 mass % of aluminum chloride and from about 0.01 to 2 mass % on an elemental basis of a surface-layer platinum component, wherein the concentration of platinum on the surface layer of the catalyst particle is at least 1.5 times the magnitude of the concentration of platinum in the central core of the catalyst particle.
Claim 13
Dependent Claim
65 words
A catalyst particle comprising alumina, from about 1 to 15 mass % of aluminum chloride and from about 0.01 to 2 mass % on an elemental basis of a surface-layer platinum component, wherein the concentration of platinum on the surface layer of the catalyst particle is at least 1.5 times the magnitude of the concentration of platinum in the central core of the catalyst particle.
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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) | 1994-05-20 | 1994-11-19 | 1995-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-20 | 1998-11-19 | 1999-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-20 | 2002-11-19 | 2003-05-21 | $7700.00 | Window Closed / Lapsed |