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US4839319A
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Hydrocarbon cracking catalysts and processes for utilizing the same
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1987-08-17
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Granted: 1989-06-13
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Expires: 2007-08-17
Abstract
Abstract A catalyst is provided which comprises a phosphorus-treated ultrastable Y-type crystalline zeolite and a non-zeolitic inorganic oxide matrix. A catalytic cracking process utilizing the catalyst is also provided.
Inventors
- 👤 William L. Schuette
- 👤 Lloyd A. Pine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:36
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/084
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
66 words
A catalyst comprising: (a) a non-zeolitic inorganic oxide matrix, and (b) an ultrastable Y-type crystalline zeolite, said zeolite having been pretreated by contacting said zeolite with a phosphorus compound selected rom the group consisting of phosphoric acid, phosphorous acid, a salt of phosphoric acid, a salt of phosphorous acid, and mixtures thereof for a time sufficient to composite an effective amount of phosphorus with said zeolite.
Claim 2
Dependent Claim
66 words
A catalyst comprising: (a) a non-zeolitic inorganic oxide matrix, and (b) an ultrastable Y-type crystalline zeolite, said zeolite having been pretreated by contacting said zeolite with a phosphorus compound selected rom the group consisting of phosphoric acid, phosphorous acid, a salt of phosphoric acid, a salt of phosphorous acid, and mixtures thereof for a time sufficient to composite an effective amount of phosphorus with said zeolite.
Claim 3
Dependent Claim
19 words
The catalyst of claim 1 wherein said zeolite is contacted with steam before being contacted with said phosphorus compound.
Claim 4
Dependent Claim
36 words
The catalyst of claim 2 wherein said zeolite is subjected to an atmosphere comprising from about 5 mole percent to about 100 mole percent steam at a temperature ranging from about 1000° to about 1600° F.
Claim 5
Dependent Claim
31 words
The catalyst of claim 1 wherein said phosphorus compound is selected from the group consisting of an ammonium salt of phosphoric acid, an ammonium salt of phosphorous acid and mixtures thereof.
Claim 6
Dependent Claim
34 words
The catalyst of claim 1 wherein said phosphorus is composited with said zeolite in an amount of at least about 0.1 weight percent, based on the weight of the zeolite, calculated as elemental phosphorus.
Claim 7
Dependent Claim
22 words
The catalyst of claim 1 wherein said zeolite is an ultrastable Y zeolite having a unit cell size below about 24.5 Angstroms.
Claim 8
Dependent Claim
26 words
The catalyst of claim 1 wherein said matrix is selected from the group consisting of silica, alumina, silica-alumina, magnesia, zirconia, titania, boria, chromia and mixtures thereof.
Claim 9
Dependent Claim
12 words
The catalyst of claim 1 wherein said matrix comprises silica and alumina.
Claim 10
Dependent Claim
51 words
The catalyst of claim 1 wherein said zeolite is present in an amount ranging from about 1 to about 40 weight percent, and wherein said phosphorus is present in an amount ranging from about 0.5 to 5 weight percent based on said zeolite, and wherein said matrix comprises silica and alumina.
References Cited (Backward Citations)
US3354096A
Cited
US4454241A
Cited
US4650783A
Cited
US4605637A
Cited
US4567152A
Cited
US4584091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |