US4263129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrotreating/hydrocracking process with low acidity catalyst
Assignee: Mobil Oil AS
•
Filing: 1979-09-04
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Granted: 1981-04-21
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Expires: 1999-09-04
Abstract
Abstract Conversion of hydrocarbons is conducted over low acidity zeolites such as the sodium form of zeolite ZSM-5 to yield products like those produced by hydrocracking but with substantially decreased proportion of light hydrocarbons having one to four carbon atoms. (Sulfiding of sodium zeolites activates such sodium zeolites for the present purpose.) The hydrocarbon conversion is conducted with mixed-phase charge (Trickle mode) under hydrogen pressure or with liquid-phase charge in a liquid-full reactor.
Inventors
- 👤 Nai Y. Chen
- 👤 David S. Shihabi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:15
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/405; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; C10G47/00; C10G47/02; C10G47/10; C10G47/12; C10G47/16; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42; Y; Y10; Y10S; Y10S208/00; Y10S208/02
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
81 words
A process for converting a high boiling hydrocarbon charge fraction to liquid products of lower boiling range which comprises contacting said charge fraction with a crystalline zeolite characterized by a silica/alumina ratio greater than 12, a constraint index between about 1 and about 12 and an acid activity measured by the alpha scale less than 10, said contacting being conducted at 650° to 850° F., space velocity of 0.1 to 5.0 LHSV and a pressure not less than about 200 psi.
Claim 2
Dependent Claim
81 words
A process for converting a high boiling hydrocarbon charge fraction to liquid products of lower boiling range which comprises contacting said charge fraction with a crystalline zeolite characterized by a silica/alumina ratio greater than 12, a constraint index between about 1 and about 12 and an acid activity measured by the alpha scale less than 10, said contacting being conducted at 650° to 850° F., space velocity of 0.1 to 5.0 LHSV and a pressure not less than about 200 psi.
Claim 3
Dependent Claim
21 words
A process according to claim 1 wherein the ion exchange sites of said zeolite are essentially occupied by alkali metal cations.
Claim 4
Dependent Claim
23 words
A process according to claim 2 wherein at least 0.5 weight percent of sulfur is included in the charge supplied to said contacting.
Claim 5
Dependent Claim
14 words
A process according to claims 2 or 3 wherein said alkali metal is sodium.
Claim 6
Dependent Claim
14 words
A process according to claims 2 or 3 wherein said alkali metal is cesium.
Claim 7
Dependent Claim
16 words
A process according to claim 1 wherein hydrogen is supplied with said charge to said contacting.
Claim 8
Dependent Claim
19 words
A process according to claims 1, 2 or 3 conducted at a temperature of about 700° to 800° F.
Claim 9
Dependent Claim
15 words
A process according to claims 1, 2 or 3 wherein said zeolite is zeolite ZSM-5.
Claim 10
Dependent Claim
22 words
A process according to claim 1 wherein said zeolite is in admixture with a metallic hydrogenation catalyst on a porous refractory support.
Claim 11
Dependent Claim
72 words
A process for converting a high boiling hydrocarbon charge fraction to liquid products of lower boiling range which comprises contacting said charge fraction with a crystalline zeolite characterized by a silica/alumina ratio greater than 12 and an acid activity measured by the alpha scale less than 10, said contacting being conducted at 650° to 850° F., space velocity of 0.1 to 5.0 LHSV and a pressure not less than about 200 psi.
Claim 12
Dependent Claim
72 words
A process for converting a high boiling hydrocarbon charge fraction to liquid products of lower boiling range which comprises contacting said charge fraction with a crystalline zeolite characterized by a silica/alumina ratio greater than 12 and an acid activity measured by the alpha scale less than 10, said contacting being conducted at 650° to 850° F., space velocity of 0.1 to 5.0 LHSV and a pressure not less than about 200 psi.
Claim 13
Dependent Claim
21 words
A process according to claim 10 wherein the ion exchange sites of said zeolite are essentially occupied by alkali metal cations.
Claim 14
Dependent Claim
23 words
A process according to claim 11 wherein at least 0.5 weight percent of sulfur is included in the charge supplied to said contacting.
Claim 15
Dependent Claim
14 words
A process according to claims 11 or 12 wherein said alkali metal is sodium.
Claim 16
Dependent Claim
14 words
A process according to claims 11 or 12 wherein said alkali metal is cesium.
Claim 17
Dependent Claim
16 words
A process according to claim 10 wherein hydrogen is supplied with said charge to said contacting.
Claim 18
Dependent Claim
19 words
A process according to claims 10, 11 or 12 conducted at a temperature of about 700° to 800° F.
Claim 19
Dependent Claim
15 words
A process according to claims 10, 11 or 12 wherein said zeolite is zeolite ZSM-5.
Claim 20
Dependent Claim
22 words
A process according to claim 10 wherein said zeolite is in admixture with a metallic hydrogenation catalyst on a porous refractory support.
Claim 21
Dependent Claim
18 words
A process according to claim 1 or 10 wherein elemental hydrogen is admixed with said hydrocarbon charge fraction.
References Cited (Backward Citations)
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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) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |