US4549956A
Expired / Lapsed
US
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Octane and total yield improvements in catalytic cracking
Assignee: Mobil Oil AS
•
Filing: 1985-03-05
•
Granted: 1985-10-29
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Expires: 2005-03-05
Abstract
Abstract Addition of AgHZSM-5 to conventional cracking catalysts results in a significant increase in gasoline octane without undue loss in gasoline yield. This octane increase is greater than could be achieved by adding HZSM-5.
Inventors
- 👤 Pochen Chu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:19
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/064; B01J29/068; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; B01J2229/00; B01J2229/10; B01J2229/24; B01J2229/30; B01J2229/40; B01J29/40; B01J29/42; B01J29/44; B01J29/70; B01J29/72; B01J29/74; B01J29/7415; Y; Y02; Y02P; Y02P30/00; Y02P30/20
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
138 words
In a process for catalytic cracking of a petroleum fraction having an initial boiling point of at least 400° F., a 50 percent boiling range of at least 500° F. and an end point range of at least 600° F. to produce motor fuels wherein said petroleum fraction is contacted at elevated temperatures of about 400° to about 1300° F. in the presence of a conventional cracking catalyst selected from a large pore size crystalline zeolite, silica-alumina, clays and mixtures thereof in admixture with an additive catalyst comprising a zeolite component characterized by a constraint index of about 1-12 and a silica to alumina mole ratio greater than about 12, said additive catalyst being subjected to hydrothermal deactivation, the improvement wherein said zeolite component contains about 0.05 to about 5 weight percent silver based on said zeolite component.
Claim 2
Dependent Claim
138 words
In a process for catalytic cracking of a petroleum fraction having an initial boiling point of at least 400° F., a 50 percent boiling range of at least 500° F. and an end point range of at least 600° F. to produce motor fuels wherein said petroleum fraction is contacted at elevated temperatures of about 400° to about 1300° F. in the presence of a conventional cracking catalyst selected from a large pore size crystalline zeolite, silica-alumina, clays and mixtures thereof in admixture with an additive catalyst comprising a zeolite component characterized by a constraint index of about 1-12 and a silica to alumina mole ratio greater than about 12, said additive catalyst being subjected to hydrothermal deactivation, the improvement wherein said zeolite component contains about 0.05 to about 5 weight percent silver based on said zeolite component.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein said silver is present in about 1 percent by weight of said zeolite component.
Claim 4
Dependent Claim
41 words
The process of claim 1 wherein said zeolite component is added in an amount which provides the zeolite component of said additive catalyst at from about 1 to about 50 wt percent of the conventional cracking catalyst in the cracking process.
Claim 5
Dependent Claim
28 words
The process of claim 3 wherein said zeolite component is at least one member selected from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35, ZSM-38 and ZSM-48.
Claim 6
Dependent Claim
15 words
The process of claim 4 wherein said zeolite component of said additive catalyst is ZSM-5.
Claim 7
Dependent Claim
26 words
The process of claim 1 wherein said crystalline zeolite of said conventional cracking catalyst is selected from the group consisting of zeolite X and zeolite Y.
Claim 8
Dependent Claim
17 words
The process of claim 6 wherein said crystalline zeolite of said conventional cracking catalyst is zeolite Y.
Claim 9
Dependent Claim
16 words
The process of claim 1 wherein the catalytic cracking takes place in fluid catalytic cracking process.
Claim 10
Dependent Claim
17 words
The process of claim 1 wherein catalytic cracking takes place in a moving bed catalytic cracking process.
Claim 11
Dependent Claim
18 words
The process of claim 1 wherein said zeolite component of the additive catalyst is incorporated in a matrix.
Claim 12
Dependent Claim
43 words
The process of claim 1 wherein at least one metal selected from the group consisting of platinum, palladium, iridium, osmium, rhodium, ruthenium and rhenium is added to the conventional cracking catalyst or to said zeolite component in order to enhance carbon monoxide conversion.
Claim 13
Dependent Claim
24 words
The process of claim 1 wherein said zeolite component is mixed with said conventional cracking catalyst during an on-stream operation of the cracking process.
Claim 14
Dependent Claim
20 words
The process of claim 4 wherein said additive catalyst and said conventional cracking catalyst are mixed in a single particle.
Claim 15
Dependent Claim
118 words
In a process for catalytic cracking of a petroleum fraction having an initial boiling point of at least 400° F., a 50 percent boiling range of at least 500° F. and an end point range of at least 600° F. to produce motor fuels wherein said petroleum fraction is contacted at elevated temperatures of about 400° to about 1300° F. in the presence of a cracking catalyst comprising zeolite Y in admixture with an additive catalyst comprising a zeolite component characterized by a constraint index of about 1-12 and silica to alumina mole ratio greater than about 12, the improvement wherein said zeolite component contains about 0.05 to about 5 weight percent silver based on said zeolite component.
Claim 16
Dependent Claim
118 words
In a process for catalytic cracking of a petroleum fraction having an initial boiling point of at least 400° F., a 50 percent boiling range of at least 500° F. and an end point range of at least 600° F. to produce motor fuels wherein said petroleum fraction is contacted at elevated temperatures of about 400° to about 1300° F. in the presence of a cracking catalyst comprising zeolite Y in admixture with an additive catalyst comprising a zeolite component characterized by a constraint index of about 1-12 and silica to alumina mole ratio greater than about 12, the improvement wherein said zeolite component contains about 0.05 to about 5 weight percent silver based on said zeolite component.
Claim 17
Dependent Claim
19 words
The process of claim 14 in which the zeolite Y cracking catalyst comprises zeolite Y in the ultrastable form.
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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) | 1988-10-28 | 1989-04-29 | 1989-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-28 | 1993-04-29 | 1993-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-28 | 1997-04-29 | 1997-10-29 | $7700.00 | Window Closed / Lapsed |