US4524140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrothermal zeolite activation
Assignee: Mobil Oil AS
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Filing: 1984-07-16
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Granted: 1985-06-18
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Expires: 2004-07-16
Abstract
Abstract Substitution of aluminum or gallium for boron or iron contained in the framework of a high silica content zeolite is effected by treating the zeolite in liquid water in the presence of a compound of aluminum or gallium.
Inventors
- 👤 Clarence D. Chang
- 👤 Joseph N. Miale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:02
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/70; B01J29/7007; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/36; B01J2229/42
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
52 words
A method for substituting aluminum or gallium for boron or iron contained in the robust framework of a high silica content crystalline zeolite, which method comprises: hydrothermally treating said zeolite in the presence of a compound of said alumina or gallium, said hydrothermal treatment being under conditions effective to induce said substitution.
Claim 2
Independent Claim
52 words
A method for substituting aluminum or gallium for boron or iron contained in the robust framework of a high silica content crystalline zeolite, which method comprises: hydrothermally treating said zeolite in the presence of a compound of said alumina or gallium, said hydrothermal treatment being under conditions effective to induce said substitution.
Claim 3
Dependent Claim
16 words
The method described in claim 1 wherein said compound of aluminum or gallium is water soluble.
Claim 4
Dependent Claim
16 words
The method described in claim 1 wherein said compound of aluminum or gallium is an oxide.
Claim 5
Dependent Claim
17 words
The method described in claim 3 wherein said aluminum is an oxide binder composited with said zeolite.
Claim 6
Independent Claim
53 words
A method for substituting aluminum for boron or iron contained in the robust framework of a crystalline zeolite of the ZSM-5 type, which method comprises: hydrothermally treating the ammonium form or the hydrogen form of said zeolite in the presence of a reactive aluminum oxide and under conditions effective to induce said substitution.
Claim 7
Independent Claim
53 words
A method for substituting aluminum for boron or iron contained in the robust framework of a crystalline zeolite of the ZSM-5 type, which method comprises: hydrothermally treating the ammonium form or the hydrogen form of said zeolite in the presence of a reactive aluminum oxide and under conditions effective to induce said substitution.
Claim 8
Dependent Claim
19 words
The method described in claim 5 wherein said crystalline zeolite is ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35, ZSM-38 or ZSM-48.
Claim 9
Independent Claim
68 words
A method for increasing the catalytic acid activity of a high silica content crystalline zeolite that contains tenaciously held boron or iron which method comprises: contacting said zeolite with a compound of aluminum or gallium under hydrothermal conditions, which conditions include a temperature of 50° C. to 375° C. for from 0.25 hour to 350 hours whereby enhancing said catalytic acid activity as determined by the alpha test.
Claim 10
Independent Claim
68 words
A method for increasing the catalytic acid activity of a high silica content crystalline zeolite that contains tenaciously held boron or iron which method comprises: contacting said zeolite with a compound of aluminum or gallium under hydrothermal conditions, which conditions include a temperature of 50° C. to 375° C. for from 0.25 hour to 350 hours whereby enhancing said catalytic acid activity as determined by the alpha test.
Claim 11
Dependent Claim
21 words
The product formed by the method of claim 1 or 2 or 3 or 4 or 5 or 6 or 7.
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) | 1988-06-17 | 1988-12-17 | 1989-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-17 | 1992-12-17 | 1993-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-17 | 1996-12-17 | 1997-06-18 | $7700.00 | Window Closed / Lapsed |