US4456527A
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Hydrocarbon conversion process
Assignee: Chevron USA Inc
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Filing: 1983-03-21
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Granted: 1984-06-26
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Expires: 2003-03-21
Abstract
Abstract A hydrocarbon conversion process is disclosed having a very high selectivity for dehydrocyclization. In one aspect of this process, a hydrocarbon feed is subjected to hydrotreating, then the hydrocarbon feed is passed through a sulfur removal system which reduces the sulfur concentration of the hydrocarbon feed to below 500 ppb, and then the hydrocarbon feed is reformed over a dehydrocyclization catalyst comprising a large pore zeolite containing at least one Group VIII metal to produce aromatics and hydrogen.
Inventors
- 👤 Waldeen C. Buss
- 👤 Leslie A. Field
- 👤 Richard C. Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:38
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/095
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
36 words
A hydrocarbon conversion process comprising reforming a hydrocarbon feed having a sulfur concentration of below 100 ppb over a catalyst comprising a large-pore zeolite containing at least one Group VIII metal to produce aromatics and hydrogen.
Claim 2
Dependent Claim
36 words
A hydrocarbon conversion process comprising reforming a hydrocarbon feed having a sulfur concentration of below 100 ppb over a catalyst comprising a large-pore zeolite containing at least one Group VIII metal to produce aromatics and hydrogen.
Claim 3
Dependent Claim
17 words
A hydrocarbon conversion process according to claim 1 wherein said large-pore zeolite is a type L zeolite.
Claim 4
Dependent Claim
73 words
A hydrocarbon conversion process comprising: (a) subjecting a hydrocarbon feed to hydrotreating; (b) passing said hydrotreated hydrocarbon feed through a sulfur removal system to reduce the sulfur concentration of said hydrotreated hydrocarbon feed to below 100 ppb; and (c) reforming said hydrotreated hydrocarbon feed having a sulfur concentration of below 100 ppb over a dehydrocyclization catalyst comprising a type L zeolite containing at least one Group VIII metal to produce aromatics and hydrogen.
Claim 5
Dependent Claim
73 words
A hydrocarbon conversion process comprising: (a) subjecting a hydrocarbon feed to hydrotreating; (b) passing said hydrotreated hydrocarbon feed through a sulfur removal system to reduce the sulfur concentration of said hydrotreated hydrocarbon feed to below 100 ppb; and (c) reforming said hydrotreated hydrocarbon feed having a sulfur concentration of below 100 ppb over a dehydrocyclization catalyst comprising a type L zeolite containing at least one Group VIII metal to produce aromatics and hydrogen.
Claim 6
Dependent Claim
21 words
A hydrocarbon conversion process according to claim 3 wherein said sulfur concentration in steps (b) and (c) is below 50 ppb.
Claim 7
Dependent Claim
27 words
A hydrocarbon conversion process according to claim 3 wherein said dehydrocyclization catalyst contains an alkaline earth metal selected from the group consisting of barium, strontium, and calcium.
Claim 8
Dependent Claim
23 words
A hydrocarbon conversion process according to claim 5 wherein said alkaline earth metal is barium and wherein said Group VIII metal is platinum.
Claim 9
Dependent Claim
28 words
A hydrocarbon conversion process according to claim 6 wherein said dehydrocyclization catalyst has from 0.1% to 35% by weight barium and from 0.1% to 5% by weight platinum.
Claim 10
Dependent Claim
28 words
A hydrocarbon conversion process according to claim 7 wherein said dehydrocyclization catalyst has from 5% to 15% by weight barium and from 0.1% to 1.5% by weight platinum.
Claim 11
Dependent Claim
24 words
A hydrocarbon conversion process according to claim 3 wherein the majority of the crystals of said type L zeolite are larger than 500 Angstroms.
Claim 12
Dependent Claim
24 words
A hydrocarbon conversion process according to claim 9 wherein the majority of the crystals of said type L zeolite are larger than 1000 Angstroms.
Claim 13
Dependent Claim
25 words
A hydrocarbon conversion process according to claim 10 wherein at least 80% of the crystals of said type L zeolite are larger than 1000 Angstroms.
Claim 14
Dependent Claim
24 words
A hydrocarbon conversion process according to claim 1 wherein said dehydrocyclization catalyst comprises: (a) a large-pore zeolite containing platinum; and (b) an inorganic binder.
Claim 15
Dependent Claim
23 words
A hydrocarbon conversion process according to claim 12 wherein said inorganic binder is selected from the group consisting of silica, alumina, and aluminosilicates.
Claim 16
Dependent Claim
74 words
A hydrocarbon conversion process comprising reforming a hydrocarbon feed over a catalyst comprising a type L zeolite containing at least one Group VIII metal to produce aromatics and hydrogen, wherein said hydrocarbon feed has a sulfur concentration of below x ppb, wherein x is determined from the formula ##EQU3## where WHSV is the weight of feed per hour per weight of catalyst, hour -1 , and θ is the desired run length in days.
Claim 17
Dependent Claim
74 words
A hydrocarbon conversion process comprising reforming a hydrocarbon feed over a catalyst comprising a type L zeolite containing at least one Group VIII metal to produce aromatics and hydrogen, wherein said hydrocarbon feed has a sulfur concentration of below x ppb, wherein x is determined from the formula ##EQU3## where WHSV is the weight of feed per hour per weight of catalyst, hour -1 , and θ is the desired run length in days.
References Cited (Backward Citations)
US3783123A
Cited
US3884797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |