US4357265A
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Catalytic cracking catalyst
Assignee: WR Grace and Co Conn
•
Filing: 1981-09-02
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Granted: 1982-11-02
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Expires: 2001-09-02
Abstract
Abstract Catalysts which produce cracked gasoline having high octane rating are produced by combining a thermally-stabilized/aluminum exchanged type Y zeolite with an inorganic oxide matrix.
Inventors
- 👤 Robert L. Chiang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:13
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: 12
Claim 1
Independent Claim
109 words
A process for preparing a cracking catalyst which comprises: (a) Exchanging a sodium type Y zeolite with an ammonium salt solution to lower the sodium content of said zeolite to below about 4 percent by weight Na 2 O; (b) calcining the ammonium exchanged zeolite at a temperature of from about 537° to 815° C.; (c) mixing said calcined zeolite with an inorganic oxide matrix and water; (d) spray drying said mixture; and (e) reacting said spray dried mixture with an acid aluminum salt solution having a pH of from about 2.0 to 3.7 to lower the sodium content to below about 1.0 percent by weight Na 2 O.
Claim 2
Dependent Claim
109 words
A process for preparing a cracking catalyst which comprises: (a) Exchanging a sodium type Y zeolite with an ammonium salt solution to lower the sodium content of said zeolite to below about 4 percent by weight Na 2 O; (b) calcining the ammonium exchanged zeolite at a temperature of from about 537° to 815° C.; (c) mixing said calcined zeolite with an inorganic oxide matrix and water; (d) spray drying said mixture; and (e) reacting said spray dried mixture with an acid aluminum salt solution having a pH of from about 2.0 to 3.7 to lower the sodium content to below about 1.0 percent by weight Na 2 O.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein said ammonium salt used at step (a) is ammonium sulfate.
Claim 4
Dependent Claim
16 words
The method of claim 1 wherein said aluminum salt used at step (e) is aluminum sulfate.
Claim 5
Dependent Claim
17 words
The process of claim 1 wherein the product of step (e) is treated with ammonium hydroxide solution.
Claim 6
Dependent Claim
18 words
The process of claim 1 wherein the product of step (e) is treated with an ammonium salt solution.
Claim 7
Dependent Claim
12 words
The process of claim 5 wherein said ammonium salt is ammonium sulfate.
Claim 8
Dependent Claim
23 words
The process of claim 6 wherein the sodium content of said catalyst is reduced to below 0.5 parts by weight Na 2 O.
Claim 9
Dependent Claim
10 words
A cracking catalyst prepared by the process of claim 1.
Claim 10
Dependent Claim
25 words
The catalyst of claim 8 wherein said matrix is selected form the group consisting of clay, silica, alumina, silica-alumina sols and gels, and mixtures thereof.
Claim 11
Dependent Claim
22 words
The catalyst of claim 8 wherein the silica to alumina ratio of said sodium Y zeolite ranges from about 4.7 to 5.2.
Claim 12
Dependent Claim
20 words
The catalyst of claim 8 wherein the zeolite comprises from about 30 to 40 percent by weight of said catalyst.
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) | 1985-11-01 | 1986-05-03 | 1986-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-01 | 1990-05-03 | 1990-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-01 | 1994-05-03 | 1994-11-02 | $7700.00 | Window Closed / Lapsed |