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US4522705A
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Octane enhancement and total liquid product yield improvements in catalytic cracking using in-situ crystallized ZSM-5 clay aggregates
Assignee: Mobil Oil AS
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Filing: 1984-06-13
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Granted: 1985-06-11
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Expires: 2004-06-13
Abstract
Abstract Octane and total yield improvement in catalytic cracking of petroleum fractions under cracking conditions can be obtained by adding to conventional cracking catalysts small amounts of an additive catalyst comprising a class of zeolites characterized by a silica to alumina mole ratio greater than 5 and a Constraint Index of 1 to 12 wherein the zeolite additive catalyst is prepared via in-situ crystallization of preformed aggregates.
Inventors
- 👤 Pochen Chu
- 👤 Gary M. Pasquale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:03
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/42; B01J29/44; B01J29/80; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/36; B01J2229/42; B01J29/65; B01J29/70
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
107 words
In a process for catalytic cracking of a petroleum fraction under cracking conditions in the presence of a conventional cracking catalyst comprising a large pore crystalline zeolite and a matrix and an additive catalyst comprising a zeolite characterized by a Constraint Index of about 1-12 and a silica to alumina mole ratio greater than about 5 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, said catalysts coming into contact with steam at elevated temperatures, the improvement wherein said additive catalyst is prepared by in-situ crystallization of a clay aggregate.
Claim 2
Dependent Claim
107 words
In a process for catalytic cracking of a petroleum fraction under cracking conditions in the presence of a conventional cracking catalyst comprising a large pore crystalline zeolite and a matrix and an additive catalyst comprising a zeolite characterized by a Constraint Index of about 1-12 and a silica to alumina mole ratio greater than about 5 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, said catalysts coming into contact with steam at elevated temperatures, the improvement wherein said additive catalyst is prepared by in-situ crystallization of a clay aggregate.
Claim 3
Dependent Claim
39 words
The process of claim 1 wherein said additive catalyst is added in an amount which provides the zeolite component of said additive catalyst at from about 0.1 weight percent to about 20 weight percent of the conventional cracking catalyst.
Claim 4
Dependent Claim
31 words
The process of claim 1 wherein said zeolite of the additive catalyst 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 5
Dependent Claim
12 words
The process of claim 1 wherein said zeolite additive catalyst is ZSM-5.
Claim 6
Dependent Claim
29 words
The process of claim 4 wherein said crystalline zeolite of said conventional cracking catalyst is selected from the group consisting of zeolite X, Zeolite Y, and naturally occurring faujasite.
Claim 7
Dependent Claim
17 words
The process of claim 5 wherein said crystalline zeolite of said conventional cracking catalyst is zeolite Y.
Claim 8
Dependent Claim
18 words
The process of claim 6 wherein said crystalline zeolite of said conventional catalyst is rare earth exchanged Y.
Claim 9
Dependent Claim
17 words
The process of claim 6 wherein said crystalline zeolite of said conventional catalyst is hydrogen exchanged Y.
Claim 10
Dependent Claim
16 words
The process of claim 6 wherein said crystalline zeolite of said conventional catalyst is ultrastable Y.
Claim 11
Dependent Claim
18 words
The process of claim 5 wherein said crystalline zeolite of said conventional catalyst is rare earth exchanged X.
Claim 12
Dependent Claim
49 words
The process of claim 1 wherein a metal selected from the group consisting of platinum, palladium, irridium, osmium, rhodium, ruthenium, and rhenium is added in an amount of from about 0.01 ppm to about 100 ppm, based on the total catalyst inventory, in order to enhance carbon monoxide conversion.
Claim 13
Dependent Claim
13 words
The process of claim 6 wherein said catalytic cracking is fluid catalytic cracking.
Claim 14
Dependent Claim
13 words
The process of claim 6 wherein said catalytic cracking is thermofor catalytic cracking.
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) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |