US3867307A
Expired / Lapsed
US
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Exchanged faujasite
Assignee: WR Grace and Co
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Filing: 1972-01-05
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Granted: 1975-02-18
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Expires: 1992-01-05
Abstract
Abstract Synthetic faujasite is exchanged with a combination of rare earth and transition metal ions. The resulting exchanged faujasites possess high thermal and steam stabilities and find utility as hydrocarbon conversion catalysts.
Inventors
- 👤 Julius Scherzer
- 👤 Edwin W Albers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:47
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
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
131 words
A MIXED RARE EARTH-TRANSITION METAL EXCHANGED FAUJASITE WHICH CONTAINS 10 TO 13% BY WEIGHT RARE EARTH ION EXPRESSED AS RE2O3; 0.5 TO 5% BY WEIGHT TRANSITION METAL ION EXPRESSED AS M2/NO WHEREIN M IS SELECTED FROM THE GROUP CONSISTING OF ZINC, CADMIUM, THALLIUM, ZIRCONIUM, MANGANESE, COBALT, NICKEL, AND COPPER AND N IS THE VALANCE OF M; AND LESS THAN 3% BY WEIGHT ALAKI METAL MEASURED AS NA2O3 CONTENT; PROCESS WHICH COMPRISES: A. EXCHANGING A SODIUM FUAJASITE WITH A RARE EARTH METAL ION SOLUTION TO IMPART THE RE2O3 CONTENT; B. CALCINING THE FAUJASITE AT A TEMPERATURE OF FROM ABOUT 400* TO 600*C; C. EXCHANGING THE FAUJASITE WITH AMMONIUM ION SOLUTION TO LOWER THE NA2O CONTENT; AND D. EXCHANGING THE FAUJASITE WITH A SOLUTION OF TRANSITION METAL ION TO IMPART THE M2O CONTENT.
Claim 2
Dependent Claim
131 words
A MIXED RARE EARTH-TRANSITION METAL EXCHANGED FAUJASITE WHICH CONTAINS 10 TO 13% BY WEIGHT RARE EARTH ION EXPRESSED AS RE2O3; 0.5 TO 5% BY WEIGHT TRANSITION METAL ION EXPRESSED AS M2/NO WHEREIN M IS SELECTED FROM THE GROUP CONSISTING OF ZINC, CADMIUM, THALLIUM, ZIRCONIUM, MANGANESE, COBALT, NICKEL, AND COPPER AND N IS THE VALANCE OF M; AND LESS THAN 3% BY WEIGHT ALAKI METAL MEASURED AS NA2O3 CONTENT; PROCESS WHICH COMPRISES: A. EXCHANGING A SODIUM FUAJASITE WITH A RARE EARTH METAL ION SOLUTION TO IMPART THE RE2O3 CONTENT; B. CALCINING THE FAUJASITE AT A TEMPERATURE OF FROM ABOUT 400* TO 600*C; C. EXCHANGING THE FAUJASITE WITH AMMONIUM ION SOLUTION TO LOWER THE NA2O CONTENT; AND D. EXCHANGING THE FAUJASITE WITH A SOLUTION OF TRANSITION METAL ION TO IMPART THE M2O CONTENT.
Claim 3
Dependent Claim
23 words
The product of claim 1 wherein the rare earth exchange step (a) is conducted at a pH of from about 3 to 3.5.
Claim 4
Dependent Claim
17 words
The product of claim 1 wherein the transition metal ion content is 1 to 2.5% by weight.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |