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US4251391A
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Reforming with multimetallic catalysts
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1979-04-13
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Granted: 1981-02-17
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Expires: 1999-04-13
Abstract
Abstract A catalyst constituted of a composite which includes hydrogenation-dehydrogenation components comprised of platinum and rhenium to which a small amount of copper is added to suppress hydrogenolysis, which is particularly acute in reforming during the early period of operation when the catalyst is placed on stream, i.e., at the startup of a reactor; and process of employing such catalyst in reforming.
Inventors
- 👤 Charles H. Mauldin
- 👤 William C. Baird, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:51
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/89; B01J23/8933; B01J23/8986; C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/085; C10G35/09
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
38 words
A reforming catalyst which consists essentially of from about 0.1 to about 2 percent platinum, from about 0.1 to about 2 percent rhenium, and from about 0.01 to about 0.1 percent copper composited with an inorganic oxide support.
Claim 2
Dependent Claim
38 words
A reforming catalyst which consists essentially of from about 0.1 to about 2 percent platinum, from about 0.1 to about 2 percent rhenium, and from about 0.01 to about 0.1 percent copper composited with an inorganic oxide support.
Claim 3
Dependent Claim
17 words
The composition of claim 1 wherein the catalyst contains from about 0.2 to about 0.6 percent platinum.
Claim 4
Dependent Claim
17 words
The composition of claim 1 wherein the catalyst contains from about 0.2 to about 0.6 percent rhenium.
Claim 5
Dependent Claim
17 words
The composition of claim 1 wherein the catalyst contains from about 0.025 to about 0.08 percent copper.
Claim 6
Dependent Claim
61 words
The composition of claim 1 wherein the catalyst contains from about 0.2 to about 0.6 percent platinum, from about 0.2 to about 0.6 percent rhenium, from about 0.025 to about 0.08 percent copper, and wherein the copper is composited with the catalyst in amount sufficient to provide a molar ratio of copper:(platinum plus rhenium) ranging from about 0.02:1 to about 0.25:1.
Claim 7
Dependent Claim
17 words
The composition of claim 1 wherein the catalyst contains from about 0.1 to about 2.5 percent halogen.
Claim 8
Dependent Claim
17 words
The composition of claim 6 wherein the catalyst contains from about 0.7 to about 1.2 percent halogen.
Claim 9
Dependent Claim
17 words
The composition of claim 1 wherein the catalyst is sulfided, and contains to about 0.2 percent sulfur.
Claim 10
Dependent Claim
17 words
The composition of claim 8 wherein the catalyst contains from about 0.05 to about 0.1 percent sulfur.
Claim 11
Dependent Claim
34 words
The composition of claim 1 wherein the catalyst contains from about 0.2 to about 0.6 percent platinum, from about 0.2 to about 0.6 percent rhenium, and from about 0.025 to about 0.08 percent copper.
Claim 12
Dependent Claim
17 words
The composition of claim 10 wherein the catalyst contains from about 0.7 to about 1.2 percent halogen.
Claim 13
Dependent Claim
20 words
The composition of claim 10 wherein the catalyst is sulfided, and contains from about 0.05 to about 0.1 percent sulfur.
Claim 14
Dependent Claim
23 words
The composition of claim 10 wherein the catalyst contains platinum and rhenium in weight ratio platinum:rhenium ranging from about 0.25:1 to about 3:1.
Claim 15
Dependent Claim
23 words
The composition of claim 13 wherein the catalyst contains platinum and rhenium in weight ratio platinum:rhenium ranging from about 0.75:1 to about 1.25:1.
Claim 16
Dependent Claim
24 words
The composition of claim 1 wherein the catalyst contains copper in molar ratio of copper:(platinum plus rhenium) ranging from about 0.02:1 to about 0.25:1.
Claim 17
Dependent Claim
20 words
The composition of claim 15 wherein the molar ratio of copper:(platinum plus rhenium) ranges from about 0.04:1 to about 0.20:1.
Claim 18
Dependent Claim
20 words
The composition of claim 5 wherein the molar ratio of copper:(platinum plus rhenium) ranges from about 0.04:1 to about 0.20:1.
Claim 19
Dependent Claim
18 words
The composition of claim 5 wherein the catalyst is sulfided, and contains up to about 0.2 percent sulfur.
Claim 20
Dependent Claim
17 words
The composition of claim 18 wherein the catalyst contains from about 0.05 to about 0.1 percent sulfur.
Claim 21
Dependent Claim
78 words
The composition of claim 1 wherein the catalyst contains from about 0.2 to about 0.6 percent platinum, from about 0.2 to about 0.6 percent rhenium, from about 0.025 to about 0.08 percent copper and the copper is composited with the catalyst in amount sufficient to provide a molar ratio of copper:(platinum plus rhenium) ranges from about 0.02:1 to about 0.25:1, the catalyst contains from about 0.1 to about 2.5 percent halogen, and up to about 0.2 percent sulfur.
Claim 22
Dependent Claim
26 words
The composition of claim 20 wherein the catalyst contains from about 0.7 to about 1.2 percent halogen, and from about 0.05 to about 0.1 percent sulfur.
Claim 23
Dependent Claim
23 words
The composition of claim 20 wherein the catalyst contains platinum and rhenium in weight ratio platinum:rhenium ranging from about 0.25:1 to about 3:1.
Claim 24
Dependent Claim
23 words
The composition of claim 22 wherein the catalyst contains platinum and rhenium in weight ratio platinum:rhenium ranging from about 0.75:1 to about 1.25:1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |