US4481104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of low acidity high silica to alumina ratio large pore zeolites for distillate production in catalytic cracking
Assignee: Mobil Oil AS
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Filing: 1984-02-14
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Granted: 1984-11-06
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Expires: 2004-02-14
Abstract
Abstract A process is disclosed for the production of distillate in the catalytic cracking of gas oils utilizing a low acidity high silica-to-alumina ratio large pore zeolite which has been subjected to exchange with alkali metal ions at pH ≦7.
Inventors
- 👤 Dennis E. Walsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:25
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/084; B01J29/70; B01J29/7007; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; B01J2229/00; B01J2229/10; B01J2229/16; B01J2229/26; B01J2229/30; B01J2229/36; B01J2229/42
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
117 words
In the process for the catalytic cracking of gas oil to produce products boiling in the naphtha and distillate fuel range wherein said gas oil is contacted at elevated temperatures over a catalyst comprising a zeolite, the improvement which comprises utilizing as a catalyst a composition comprising a matrix and a crystalline aluminosilicate zeolite, said crystalline aluminosilicate zeolite being characterized by (1) a framework silica-to-alumina ratio greater than ˜100; (2) a pore size greater than about at least 8 Angstrom units; (3) an alpha value no greater than 3 as a result of said zeolite having had its activity reduced by treatment of the same with alkali metal cations at a pH of from 4 to 6.
Claim 2
Dependent Claim
117 words
In the process for the catalytic cracking of gas oil to produce products boiling in the naphtha and distillate fuel range wherein said gas oil is contacted at elevated temperatures over a catalyst comprising a zeolite, the improvement which comprises utilizing as a catalyst a composition comprising a matrix and a crystalline aluminosilicate zeolite, said crystalline aluminosilicate zeolite being characterized by (1) a framework silica-to-alumina ratio greater than ˜100; (2) a pore size greater than about at least 8 Angstrom units; (3) an alpha value no greater than 3 as a result of said zeolite having had its activity reduced by treatment of the same with alkali metal cations at a pH of from 4 to 6.
Claim 3
Dependent Claim
26 words
The process of claim 1 wherein said large pore crystalline aluminosilicate zeolite is selected from the group consisting of zeolite Y, zeolite beta, and zeolite ZSM-20.
Claim 4
Dependent Claim
11 words
The process of claim 2 wherein said zeolite is zeolite Y.
Claim 5
Dependent Claim
18 words
The process of claim 3 wherein said zeolite Y has been treated with a solution of sodium nitrate.
Claim 6
Dependent Claim
13 words
The process of claim 1 wherein the pH is from 4 to 5.
References Cited (Backward Citations)
US3449070A
Cited
GB1059464A
Cited
US3354077A
Cited
US3493519A
Cited
US3506400A
Cited
US3939058A
Cited
GB1351035A
Cited
US3937791A
Cited
US3748251A
Cited
US4021331A
Cited
US4097410A
Cited
US4284529A
Cited
US4332699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-06 | 1988-05-07 | 1988-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-06 | 1992-05-07 | 1992-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-06 | 1996-05-07 | 1996-11-06 | $7700.00 | Window Closed / Lapsed |