US3595611A
Expired / Lapsed
US
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Cation and thermal stabilization of faujasite-type zeolites
Assignee: WR Grace and Co
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Filing: 1969-02-03
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Granted: 1971-07-27
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Expires: 1989-02-03
Abstract
Abstract A PROCESS FOR PREPARING A FAUJASITE TYPE ZEOLITE HAVING A SILICA TO ALUMINA RATIO OF AT LEAST 3.2 BY TREATING THE FAUJASITE WITH A COMBINATION AMMONIUM ION EXCHANGE AND METAL CATION EXCHANGE INCLUDING RARE EARTH TO REDUCE THE NA2O LEVEL IN THE PRODUCT TO BELOW 3% FOLLOWED BY THERMAL STABILIZATION AND A SUBSEQUENT AMMONIUM ION EXCHANGE. THE RESULTING ZEOLITE IS CHARACTERIZED BY HIGH THERMAL STABILITY AND HIGH CATALYTIC ACTIVITY AND SELECTIVITY, PARTICULARLY AS A COMPONENT IN A HYDROCARBON CRACKING CATALYST.
Inventors
- 👤 Carl Vance Mcdaniel
- 👤 Richard William Baker
- 👤 Clark Ace Rundell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:54
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186; B01J29/00; B01J29/04; B01J29/06; B01J29/08; Y; Y10; Y10S; Y10S423/00; Y10S423/21
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References Cited (Backward Citations)
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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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |