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US3966643A
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Rare earth transition metal exchanged faujasites and catalysts prepared therefrom
Assignee: WR Grace and Co
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Filing: 1974-02-15
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Granted: 1976-06-29
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Expires: 1994-02-15
Abstract
Abstract A novel mixed rare earth-transition metal exchanged faujasite is prepared by exchanging alkali metal faujasite with a mixture of rare earth and transition metal salts at a pH of about 3.5. The novel faujasite, which contains 0.2 to 3% transition metal and 2 to 14% rare earths, (both ranges expressed as oxides), is used as a hydrocarbon conversion catalyst or as a component in a zeolite promoted hydrocarbon conversion catayst.
Inventors
- 👤 Julius Scherzer
- 👤 Philip K. Maher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:54
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/10; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
122 words
A method for preparing the catalytically active faujasite which contains 0.2 to 3% by weight transition metal ions calculated as ##EQU1## wherein M is a transition metal ion selected from the group consisting of Cr, Fe and mixtures thereof, and n is the valence of M, and 2 to 15% by weight rare earth ions calculated as RE 2 O 3 which comprises: a. exchanging sodium faujasite with a mixture of chromium and rare earth ions in aqueous solution, said solution having a pH of 2 to 4 and from about 0.01 to 0.2 moles transition metal ions per liter and from 0.1 to 0.4 RE ions per liter; and b. calcining said exchanged faujasite at a temperature of 600° to 1500°F.
Claim 2
Independent Claim
122 words
A method for preparing the catalytically active faujasite which contains 0.2 to 3% by weight transition metal ions calculated as ##EQU1## wherein M is a transition metal ion selected from the group consisting of Cr, Fe and mixtures thereof, and n is the valence of M, and 2 to 15% by weight rare earth ions calculated as RE 2 O 3 which comprises: a. exchanging sodium faujasite with a mixture of chromium and rare earth ions in aqueous solution, said solution having a pH of 2 to 4 and from about 0.01 to 0.2 moles transition metal ions per liter and from 0.1 to 0.4 RE ions per liter; and b. calcining said exchanged faujasite at a temperature of 600° to 1500°F.
Claim 3
Dependent Claim
27 words
The process of claim 1 wherein said calcined faujasite is washed to lower the Na 2 O content thereof to from about 0.05 to 3.0% by weight.
Claim 4
Dependent Claim
17 words
The method of claim 1 wherein said exchange is conducted at a temperature of 80° to 105°C.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein said faujasite is washed with ammonium sulfate.
Claim 6
Dependent Claim
15 words
The method of claim 1 wherein said rare earth and transition metal salts are chlorides.
Claim 7
Dependent Claim
19 words
The method of claim 1 wherein said faujasite has a silica to alumina mole ratio of greater than 3.
Claim 8
Dependent Claim
17 words
The method of claim 1 wherein the silica to alumina ratio of said faujasite remains essentially constant.
References Cited (Backward Citations)
US3271418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |