US4264474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ammoniated silica-alumina gel and catalyst containing the same and processes for producing same
Assignee: HARSHAW/FILTROL PARTNERSHIP A PARTNERSHIP OF
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Filing: 1979-06-01
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Granted: 1981-04-28
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Expires: 1999-06-01
Abstract
Abstract This invention relates to hydrothermal treatment of silica-alumina cogels resulting in a reduction in the NH 4 content of the gel and the generation of a beta crystal phase and the employent of such gels as cracking catalysts.
Inventors
- 👤 Hamid Alafandi
- 👤 Dennis Stamires
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:31
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; B; B01; B01J; B01J21/00; B01J21/12; B01J23/00; B01J23/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
56 words
An ammoniated silica-alumina gel having an SiO 2 /Al 2 O 3 molar ratio more than 1 and less than 3, and containing less than 0.3 equivalents of NH 4 cations per mole of Al 2 O 3 in the gel and rare earth cations and a crystalline phase having "d" spacings according to Table 2.
Claim 2
Dependent Claim
56 words
An ammoniated silica-alumina gel having an SiO 2 /Al 2 O 3 molar ratio more than 1 and less than 3, and containing less than 0.3 equivalents of NH 4 cations per mole of Al 2 O 3 in the gel and rare earth cations and a crystalline phase having "d" spacings according to Table 2.
Claim 3
Dependent Claim
79 words
An ammoniated silica-alumina gel having an SiO 2 /Al 2 O 3 molar ratio in the range of in excess of 1 and less than about 2.5 and containing ammonium cation in amount substantially less than 0.3 equivalents per mole of Al 2 O 3 and sodium expressed as Na 2 O of less than about 1% by weight of the exchanged gel on a volatile free basis and a crystalline phase having "d" spacings according to Table 2.
Claim 4
Dependent Claim
79 words
An ammoniated silica-alumina gel having an SiO 2 /Al 2 O 3 molar ratio in the range of in excess of 1 and less than about 2.5 and containing ammonium cation in amount substantially less than 0.3 equivalents per mole of Al 2 O 3 and sodium expressed as Na 2 O of less than about 1% by weight of the exchanged gel on a volatile free basis and a crystalline phase having "d" spacings according to Table 2.
Claim 5
Dependent Claim
67 words
An ammoniate silica-alumina gel of SiO 2 /Al 2 O 3 ratio or more than 1 and less than 3 and containing less than 0.3 equivalents of NH 4 cations and from about 0.1 more than 0.4 equivalents of rare earth cations expressed as ReO cations per mole of Al 2 O 3 in the gel and a crystalline phase having "d" spacings according to Table 2.
Claim 6
Dependent Claim
67 words
An ammoniate silica-alumina gel of SiO 2 /Al 2 O 3 ratio or more than 1 and less than 3 and containing less than 0.3 equivalents of NH 4 cations and from about 0.1 more than 0.4 equivalents of rare earth cations expressed as ReO cations per mole of Al 2 O 3 in the gel and a crystalline phase having "d" spacings according to Table 2.
Claim 7
Dependent Claim
96 words
An ammoniated silica-alumina gel having an SiO 2 /Al 2 O 3 molar ratio in the range of more than 1 and up to about 2 and containing less than about 1.5 equivalents of ammonium cation per mole Al 2 O 3 in the gel and from about 0.1 to more than 0.4 equivalents of ReO per mole of Al 2 O 3 and sodium expressed as Na 2 O of less than about 0.5% by weight of the gel on a volatile free basis and a crystalline phase having "d" spacings according to Table 2.
Claim 8
Dependent Claim
96 words
An ammoniated silica-alumina gel having an SiO 2 /Al 2 O 3 molar ratio in the range of more than 1 and up to about 2 and containing less than about 1.5 equivalents of ammonium cation per mole Al 2 O 3 in the gel and from about 0.1 to more than 0.4 equivalents of ReO per mole of Al 2 O 3 and sodium expressed as Na 2 O of less than about 0.5% by weight of the gel on a volatile free basis and a crystalline phase having "d" spacings according to Table 2.
Claim 9
Dependent Claim
46 words
The gel of claims 1, 2, 3, or 4, in which the NH 4 content is less than about 0.15 and the rare earth cations are in the range of about 0.5 to about 5 equivalents per mole of Al 2 O 3 in the gel.
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) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |