Patent US4550092A successfully refreshed from Google Patents.
US4550092A
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Activity enhancement of high silica zeolites
Assignee: Mobil Oil AS
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Filing: 1983-11-25
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Granted: 1985-10-29
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Expires: 2003-11-25
Abstract
Abstract A crystalline high silica-containing zeolite such as ZSM-5 is treated with an ammoniacal alkali metal aluminate so as to enhance the catalytic activity thereof.
Inventors
- 👤 Clarence D. Chang
- 👤 Joseph N. Miale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:33
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/65; B01J29/70
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
55 words
The product produced by contacting a high silica containing crystalline zeolite having a silica-to-alumina ratio greater than 500 with an ammoniacal solution of an alkali metal aluminate for a period of time ranging from 1/2 hour to 5 days at a temperature of from 20° to 50° C. and at pH of at least 10.
Claim 2
Dependent Claim
55 words
The product produced by contacting a high silica containing crystalline zeolite having a silica-to-alumina ratio greater than 500 with an ammoniacal solution of an alkali metal aluminate for a period of time ranging from 1/2 hour to 5 days at a temperature of from 20° to 50° C. and at pH of at least 10.
Claim 3
Dependent Claim
13 words
The product of claim 1 wherein the alakali metal aluminate is sodium aluminate.
Claim 4
Dependent Claim
59 words
The product produced by contacting a high silica zeolite of the ZSM-5 type having a silica-to-alumina ratio of at least 500 with an ammoniacal solution of an alkali metal aluminate at a temperature of from 20° to 50° C. for a period of time ranging from 1/2 day to 5 days and at a pH of at least 10.
Claim 5
Dependent Claim
59 words
The product produced by contacting a high silica zeolite of the ZSM-5 type having a silica-to-alumina ratio of at least 500 with an ammoniacal solution of an alkali metal aluminate at a temperature of from 20° to 50° C. for a period of time ranging from 1/2 day to 5 days and at a pH of at least 10.
Claim 6
Dependent Claim
13 words
The product of claim 3 wherein the alkali metal aluminate is sodium aluminate.
Claim 7
Dependent Claim
13 words
The product of claim 3 wherein said zeolite has the structure of ZSM-5.
Claim 8
Dependent Claim
17 words
The product of claim 4 wherein the ZSM-5 zeolite has a silica-to-alumina ratio in excess of 1600.
Claim 9
Dependent Claim
15 words
The product of claim 4 wherein the ZSM-5 zeolite has a silica-to-alumina ratio approaching infinity.
Claim 10
Dependent Claim
16 words
The product of claim 3 wherein the ammoniacal alkali metal aluminate is applied by vacuum impregnation.
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) | 1988-10-28 | 1989-04-29 | 1989-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-28 | 1993-04-29 | 1993-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-28 | 1997-04-29 | 1997-10-29 | $7700.00 | Window Closed / Lapsed |