Patent US4664780A successfully refreshed from Google Patents.
US4664780A
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Hydrocarbon cracking with yttrium exchanged zeolite Y catalyst
Assignee: Ashland LLC
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Filing: 1985-11-01
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Granted: 1987-05-12
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Expires: 2005-11-01
Abstract
Abstract A hydrocarbon cracking catalyst comprises rare earth exchanged "Y" zeolite which has been further ion exchanged to enhance the yttrium content. The catalyst is employed in a fluid catalytic cracking process to maximize gasoline.
Inventors
- 👤 Charles F. Lochow
- 👤 Daniel B. Kovacs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:28
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/084; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
118 words
A process for cracking a gas oil boiling range hydrocarbon feedstock comprising the step of contacting the feedstock in a catalytic cracking zone under catalytic cracking conditions to produce convulsion products comprising gasoline with a catalyst composition comprising: A. a Y crystalline aluminosilicate zeolite, having the structure of faujasite and having uniform pore diameters and a silica to alumina mole ratio of at least about 5; B. an inorganic oxide matrix; and C. said zeolite having been ion exchanged with a mixture of rare earths prior to compositing with said matrix; and D. said zeolite having been subsequently further ion exchanged with yttrium following compositing with said matrix, whereby the catalyst composition contains 0.30 to 3.0 wt.% yttrium.
Claim 2
Dependent Claim
118 words
A process for cracking a gas oil boiling range hydrocarbon feedstock comprising the step of contacting the feedstock in a catalytic cracking zone under catalytic cracking conditions to produce convulsion products comprising gasoline with a catalyst composition comprising: A. a Y crystalline aluminosilicate zeolite, having the structure of faujasite and having uniform pore diameters and a silica to alumina mole ratio of at least about 5; B. an inorganic oxide matrix; and C. said zeolite having been ion exchanged with a mixture of rare earths prior to compositing with said matrix; and D. said zeolite having been subsequently further ion exchanged with yttrium following compositing with said matrix, whereby the catalyst composition contains 0.30 to 3.0 wt.% yttrium.
Claim 3
Dependent Claim
28 words
Process according to claim 1 wherein said catalytic cracking conditions include a temperature ranging from 900° to 1000° F. and a pressure ranging from 12 to 20 psig.
Claim 4
Dependent Claim
28 words
Process according to claim 1 in which said conversion products comprise liquids and gases and said gasoline produced comprises at least 50 wt.% of the liquid conversion products.
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) | 1990-05-11 | 1990-11-10 | 1991-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-11 | 1994-11-10 | 1995-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-11 | 1998-11-10 | 1999-05-12 | $7700.00 | Window Closed / Lapsed |