US4787969A
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Reforming with polymetallic catalysts
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1987-05-04
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Granted: 1988-11-29
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Expires: 2007-05-04
Abstract
Abstract A process for reforming a naphtha feed at reforming conditions by contacting said feed, and hydrogen, with a halogenated, supported platinum-rhenium catalyst promoted with an agglomerated iridium component. The iridium component is agglomerated sufficient to exhibit a crystallinity greater than 50 percent, preferably greater than 75 percent, and more preferably 100 percent, as measured by X-ray.
Inventors
- 👤 William C. Baird, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:30
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/085; C10G35/09; B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/46
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
46 words
In a process for catalytically reforming, with hydrogen, a hydrocarbon naphtha feed at reforming conditions, the improvement comprising contacting said naphtha feed, and hydrogen, with a halogenated, supported platinum-rhenium catalyst promoted with iridium agglomerated to exhibit a crystallinity greater than 50 percent, as measured by X-ray.
Claim 2
Dependent Claim
46 words
In a process for catalytically reforming, with hydrogen, a hydrocarbon naphtha feed at reforming conditions, the improvement comprising contacting said naphtha feed, and hydrogen, with a halogenated, supported platinum-rhenium catalyst promoted with iridium agglomerated to exhibit a crystallinity greater than 50 percent, as measured by X-ray.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein the crystallinity of the agglomerated iridium is greater than about 75 percent.
Claim 4
Dependent Claim
16 words
The process of claim 1 wherein the crystallinity of the agglomerated iridium is about 100 percent.
Claim 5
Dependent Claim
21 words
The process of claim 1 wherein the crystallinity of the agglomerated iridium ranges from about 60 percent to about 100 percent.
Claim 6
Dependent Claim
21 words
The process of claim 1 wherein the crystallinity of the agglomerated iridium ranges from about 75 percent to about 100 percent.
Claim 7
Dependent Claim
45 words
The process of claim 1 wherein the catalyst contains from about 0.05 percent to about 1 percent platinum, from about 0.05 percent to about 1 percent rhenium, and from about 0.01 percent to about 1 percent iridium, based on the weight of the total catalyst.
Claim 8
Dependent Claim
37 words
The process of claim 6 wherein the catalyst contains from about 0.3 percent to about 0.7 percent platinum, from about 0.3 percent to about 0.7 percent rhenium, and from about 0.1 percent to about 0.7 percent iridium.
Claim 9
Dependent Claim
25 words
The process of claim 1 wherein the catalyst contains from about 0.1 percent to about 2.5 percent halogen, based on the weight of the catalyst.
Claim 10
Dependent Claim
18 words
The process of claim 8 wherein the catalyst contains from about 0.7 percent to about 1.2 percent halogen.
Claim 11
Dependent Claim
10 words
The process of claim 8 wherein the halogen is chlorine.
Claim 12
Dependent Claim
10 words
The process of claim 1 wherein the catalyst is sulfided.
Claim 13
Dependent Claim
22 words
The process of claim 1 wherein the catalyst contains up to about 0.2 percent sulfur, based on the weight of the catalyst.
Claim 14
Dependent Claim
18 words
The process of claim 12 wherein the catalyst contains from about 0.05 percent to about 0.1 percent sulfur.
Claim 15
Dependent Claim
16 words
The process of claim 1 wherein the platinum, rhenium, and iridium metals are supported upon alumina.
Claim 16
Dependent Claim
92 words
In a process for catalytically reforming, with hydrogen, a naphtha feed at reforming conditions by contacting said naphtha feed with a reforming catalyst which contains from about 0.05 percent to about 1 percent platinum, from about 0.05 percent to about 1 percent rhenium, from about 0.01 to about 1 percent iridium, from about 0.1 to about 2.5 percent halogen, and sulfur in concentrations ranging up to about 0.2 percent, the improvement wherein the iridium component of said catalyst is agglomerated to exhibit a crystallinity greater than 50 percent, as measured by X-ray.
Claim 17
Dependent Claim
92 words
In a process for catalytically reforming, with hydrogen, a naphtha feed at reforming conditions by contacting said naphtha feed with a reforming catalyst which contains from about 0.05 percent to about 1 percent platinum, from about 0.05 percent to about 1 percent rhenium, from about 0.01 to about 1 percent iridium, from about 0.1 to about 2.5 percent halogen, and sulfur in concentrations ranging up to about 0.2 percent, the improvement wherein the iridium component of said catalyst is agglomerated to exhibit a crystallinity greater than 50 percent, as measured by X-ray.
Claim 18
Dependent Claim
18 words
The process of claim 15 wherein the crystallinity of the agglomerated iridium is greater than about 75 percent.
Claim 19
Dependent Claim
18 words
The process of claim 15 wherein the crystallinity of the agglomerated iridium is greater than about 100 percent.
Claim 20
Dependent Claim
21 words
The process of claim 15 wherein the crystallinity of the agglomerated iridium ranges from about 60 percent to about 100 percent.
References Cited (Backward Citations)
US4172817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-29 | 1992-05-30 | 1992-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-29 | 1996-05-30 | 1996-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-29 | 2000-05-30 | 2000-11-29 | $7700.00 | Window Closed / Lapsed |