US4415439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic cracking catalyst
Assignee: WR Grace and Co Conn
•
Filing: 1982-05-05
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Granted: 1983-11-15
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Expires: 2002-05-05
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
2026-10-28 07:32
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; Y; Y10; Y10S; Y10S208/00; Y10S208/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
146 words
In a method for catalytically cracking hydrocarbons to obtain high octane gasoline fractions wherein said hydrocarbons are reacted under catalytic cracking conditions with a catalyst which comprises a zeolite mixed with an inorganic oxide matrix, the improvement comprising using a catalyst prepared by the process comprising: (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
146 words
In a method for catalytically cracking hydrocarbons to obtain high octane gasoline fractions wherein said hydrocarbons are reacted under catalytic cracking conditions with a catalyst which comprises a zeolite mixed with an inorganic oxide matrix, the improvement comprising using a catalyst prepared by the process comprising: (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
13 words
The method of claim 1 wherein said catalyst is a fluid cracking catalyst.
Claim 4
Dependent Claim
16 words
The method of claim 1 wherein the aluminum salt used at step (e) is aluminum sulfate.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein said ammonium salt used at step (a) is ammonium sulfate.
Claim 6
Dependent Claim
20 words
The method of claim 1 wherein the zeolite comprises from about 30 to 40 percent by weight of said catalyst.
Claim 7
Dependent Claim
27 words
The method of claim 1 wherein the matrix comprises clay and an inorganic oxide binder selected from the group consisting of silica, alumina, silica-alumina sols and gels.
References Cited (Backward Citations)
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US3798177A
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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) | 1986-11-14 | 1987-05-16 | 1987-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-14 | 1991-05-16 | 1991-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-14 | 1995-05-16 | 1995-11-15 | $7700.00 | Window Closed / Lapsed |