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US4456693A
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Hydrocracking catalyst
Assignee: WR Grace and Co Conn
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Filing: 1983-04-18
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Granted: 1984-06-26
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Expires: 2003-04-18
Abstract
Abstract A stable, highly active hydrocracking catalyst which contains a rare earth/noble metal exchanged ultrastable type Y zeolite dispersed in an inorganic oxide matrix. The catalyst is hydrated to a moisture level of from about 5 to 30 percent by weight H2O prior to activation and use in a hydrocracking process.
Inventors
- 👤 William A. Welsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:53
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/10; B01J29/12; B01J29/126
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
115 words
A process for preparing hydrocracking catalyst which contains: (1) a palladium/rare earth ultrastable type Y zeolite which contains from about 0.1 to 2 weight percent Pd and 0.5 to 8 weight percent RE 2 O 3 , (2) an inorganic oxide matrix and (3) from about 5 to 30 weight percent H 2 O comprising the steps: (a) forming said zeolite and matrix into catalyst particles; (b) drying said catalyst particles at a temperature of from about 400° to 600° C. to obtain particles having a moisture content below about 3 weight percent; and (c) rehydrating the catalyst particles prior to use in a hydrocracking process to obtain the moisture level set forth at (3).
Claim 2
Dependent Claim
115 words
A process for preparing hydrocracking catalyst which contains: (1) a palladium/rare earth ultrastable type Y zeolite which contains from about 0.1 to 2 weight percent Pd and 0.5 to 8 weight percent RE 2 O 3 , (2) an inorganic oxide matrix and (3) from about 5 to 30 weight percent H 2 O comprising the steps: (a) forming said zeolite and matrix into catalyst particles; (b) drying said catalyst particles at a temperature of from about 400° to 600° C. to obtain particles having a moisture content below about 3 weight percent; and (c) rehydrating the catalyst particles prior to use in a hydrocracking process to obtain the moisture level set forth at (3).
Claim 3
Dependent Claim
10 words
A hydrocracking catalyst obtained by the process of claim 1.
Claim 4
Dependent Claim
19 words
The composition of claim 2 wherein said zeolite possesses a unit cell of from about 24.45 to 24.55 A°.
Claim 5
Dependent Claim
53 words
The catalyst of claim 2 which is further characterized by the ability to retain a unit cell size of at least 24.30 A° for a period of at least 8 hours when exposed to a temperature of 732° C. in the presence of 100 percent steam maintained at a pressure of two atmospheres.
Claim 6
Dependent Claim
18 words
The catalyst of claim 2 which contains from about 60 to 90 weight percent of said zeolite component.
Claim 7
Dependent Claim
43 words
The catalyst of claim 2 which is activated prior to use in a hydrocracking process by drying said rehydrated catalyst at a temperature of about 25° to 400° C. to a moisture level of about 0.5 to 2.5 weight percent H 2 O.
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) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |