US3332886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of transition metal-fluoro-alumino-silicate catalysts
Assignee: Shell USA Inc
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Filing: 1963-10-21
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Granted: 1967-07-25
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Expires: 1983-10-21
Abstract
No abstract record available.
Inventors
- 👤 William B Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:26
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/30; B01J23/00; B01J23/70; B01J23/74; B01J37/22; B01J37/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A PROCESS FOR THE PREPARATION OF A TRANSITION METALFLUORO-ALUMINOSILICATE CATALYST, SAID METAL HAVING AN ATOMIC NUMBER LESS THAN 79, COMPRISING THE FORMATION OF A SILICA-ALUMINA HYDROGEL, WASHING THE HYDROGEL TO REMOVE UNDESIRABLE CATIONS FROM THE HYDROGEL, EXCHANGING TRANSITION METAL IONS ONTO THE SURFACE OF THE HYDROGEL IN THE PRESENCE OF FLUORIDE IONS, AND REMOVING WATER FROM THE ION-EXCHANGED HYDROGEL, THE IMPROVEMENT WHICH COMPRISES TREATING THE WASHED HYDROGEL, PRIOR TO EXCHANGE OF TRANSITION METAL IONS THEREON, WITH SUFFICIENT DILUTE AMMONIUM HYDROXIDE TO PROVIDE A PH OF 7-9, THEREBY INCREASING THE AMOUNT OF TRANSITION METAL EXCHANGED ONTO THE HYDROGEL.
Claim 2
Dependent Claim
98 words
IN A PROCESS FOR THE PREPARATION OF A TRANSITION METALFLUORO-ALUMINOSILICATE CATALYST, SAID METAL HAVING AN ATOMIC NUMBER LESS THAN 79, COMPRISING THE FORMATION OF A SILICA-ALUMINA HYDROGEL, WASHING THE HYDROGEL TO REMOVE UNDESIRABLE CATIONS FROM THE HYDROGEL, EXCHANGING TRANSITION METAL IONS ONTO THE SURFACE OF THE HYDROGEL IN THE PRESENCE OF FLUORIDE IONS, AND REMOVING WATER FROM THE ION-EXCHANGED HYDROGEL, THE IMPROVEMENT WHICH COMPRISES TREATING THE WASHED HYDROGEL, PRIOR TO EXCHANGE OF TRANSITION METAL IONS THEREON, WITH SUFFICIENT DILUTE AMMONIUM HYDROXIDE TO PROVIDE A PH OF 7-9, THEREBY INCREASING THE AMOUNT OF TRANSITION METAL EXCHANGED ONTO THE HYDROGEL.
References Cited (Backward Citations)
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US2477695A
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US2623860A
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US2917466A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |