US4588495A
Expired / Lapsed
US
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Catalytic reforming process
Assignee: IFP Energies nouvelles
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Filing: 1985-02-22
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Granted: 1986-05-13
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Expires: 2005-02-22
Abstract
Abstract In a catalytic reforming process wherein a charge is circulated successively through a first catalyst bed and then at least one further catalyst bed, the improvement wherein the catalyst of the first bed comprises a carrier of alumina base and, by weight in proportion to the carrier, 0.05-0.6% of platinum, 0.005-3% of rhenium and 0.1-15% of at least one halogen and wherein each catalyst of the other beds contains a carrier of alumina base and, by weight with respect to the carrier, 0.05-0.6% of platinum, 0.05-3% of at least one metal promoter selected from the group consisting of tin, thallium and indium and 0.1-15% of at least one halogen, the proportion by weight of the catalyst containing platinum and rhenium ranging from 8 to 40% with respect to the total catalyst mass used in all the catalyst beds.
Inventors
- 👤 Jean-Pierre Franck
- 👤 Jean-Paul Bournonville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:42
CPC Classifications
C; C10; C10G; C10G59/00; C10G59/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
138 words
In a catalytic reforming process wherein a charge is circulated successively through a first catalyst bed and then at least one further catalyst bed, the improvement wherein the catalyst of the first bed comprises a carrier of alumina base and, by weight in proportion to the carrier, 0.05-0.6% of platinum, 0.005-3% of rhenium and 0.1-15% of at least one halogen and wherein each catalyst of the other beds contains a carrier of alumina base and, by weight with respect to the carrier, 0.05-0.6% of platinum, 0.05-3% of at least one metal promoter selected from the group consisting of tin, thallium and indium and 0.1-15% of at least one halogen, the proportion by weight of the catalyst containing platinum and rhenium ranging from 8 to 40% with respect to the total catalyst mass used in all the catalyst beds.
Claim 2
Dependent Claim
138 words
In a catalytic reforming process wherein a charge is circulated successively through a first catalyst bed and then at least one further catalyst bed, the improvement wherein the catalyst of the first bed comprises a carrier of alumina base and, by weight in proportion to the carrier, 0.05-0.6% of platinum, 0.005-3% of rhenium and 0.1-15% of at least one halogen and wherein each catalyst of the other beds contains a carrier of alumina base and, by weight with respect to the carrier, 0.05-0.6% of platinum, 0.05-3% of at least one metal promoter selected from the group consisting of tin, thallium and indium and 0.1-15% of at least one halogen, the proportion by weight of the catalyst containing platinum and rhenium ranging from 8 to 40% with respect to the total catalyst mass used in all the catalyst beds.
Claim 3
Dependent Claim
34 words
A process according to claim 1, wherein the catalyst of the first catalyst bed wherethrough passes the charge contains, in proportion by weight to the alumina carrier, 0.1-0.5% of platinum and 0.07-2% of rhenium.
Claim 4
Dependent Claim
36 words
A process according to claim 1, wherein the catalyst other than that of the first catalyst bed contains, in proportion by weight to the carrier, 0.1-0.5% of platinum and 0.07-2% of at least one metal promoter.
Claim 5
Dependent Claim
29 words
A process according to claim 1, wherein the proportion by weight of the catalyst of the first catalyst bed ranges from 10 to 20% of the total catalyst mass.
Claim 6
Dependent Claim
22 words
A process according to claims 1, wherein the catalyst containing platinum and at least one metal promoter, further contains 0.005-0.3% of iridium.
Claim 7
Dependent Claim
12 words
A process according to claim 1, wherein said metal promoter is tin.
Claim 8
Dependent Claim
12 words
A process according to claim 1, wherein said metal promoter is indium.
Claim 9
Dependent Claim
12 words
A process according to claim 1, wherein said metal promoter is thallium.
Claim 10
Dependent Claim
25 words
A process according to claim 2, wherein rhenium is present in an amount of 0.1 to 0.5% in proportion by weight to the alumina carrier.
Claim 11
Dependent Claim
25 words
A process according to claim 3, wherein the promoter is present in an amount of 0.1 to 0.6% in proportion by weight to the carrier.
Claim 12
Dependent Claim
10 words
A process according to claim 1 comprising three catalyst beds.
Claim 13
Dependent Claim
10 words
A process according to claim 1 comprising two catalyst beds.
Claim 14
Dependent Claim
142 words
In a catalytic reforming process wherein a charge is circulated successively through a first catalyst bed and then at least one further catalyst bed, the improvement wherein the catalyst of the first bed consists essentially of a carrier of alumina base and, by weight in proportion to the carrier, 0.05-0.6% of platinum, 0.005-3% of rhenium and 0.1-15% of at least one halogen and wherein each catalyst of the other beds consists essentially of a carrier of alumina base and, by weight with respect to the carrier, 0.05-0.6% of platinum, 0.05-3% of at least one metal promoter selected from the group consisting of tin, thallium and indium and 0.1-15% of at least one halogen, the proportion by weight of the catalyst containing platinum and rhenium ranging from 8 to 40% with respect to the total catalyst mass used in all the catalyst beds.
Claim 15
Dependent Claim
142 words
In a catalytic reforming process wherein a charge is circulated successively through a first catalyst bed and then at least one further catalyst bed, the improvement wherein the catalyst of the first bed consists essentially of a carrier of alumina base and, by weight in proportion to the carrier, 0.05-0.6% of platinum, 0.005-3% of rhenium and 0.1-15% of at least one halogen and wherein each catalyst of the other beds consists essentially of a carrier of alumina base and, by weight with respect to the carrier, 0.05-0.6% of platinum, 0.05-3% of at least one metal promoter selected from the group consisting of tin, thallium and indium and 0.1-15% of at least one halogen, the proportion by weight of the catalyst containing platinum and rhenium ranging from 8 to 40% with respect to the total catalyst mass used in all the catalyst beds.
References Cited (Backward Citations)
US3669875A
Cited
US4401557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-12 | 1989-11-11 | 1990-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-12 | 1993-11-11 | 1994-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-12 | 1997-11-11 | 1998-05-13 | $7700.00 | Window Closed / Lapsed |