US4753909A
Expired / Lapsed
US
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Bridged clays of improved thermal stability process for their preparation and utilization as catalysts
Assignee: Elf Antar France
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Filing: 1986-10-17
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Granted: 1988-06-28
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Expires: 2006-10-17
Abstract
Abstract There are provided clays of laminated structure bridged by metallic oxides selected from oxides of aluminum and zirconium and containing from 10 to 50% and preferably from 20 to 40% of an oxide of the metal of the group of the lanthanides, preferably of cerium. The presence of cerium improves the thermal resistance during a dry calcination or even under humid air. The clays can be used as catalysts during the conversion of hydrocarbons.
Inventors
- 👤 Jacques Bousquet
- 👤 Francois Fajula
- 👤 Francois Figueras
- 👤 Claude Gueguen
- 👤 Abbas Mattrod-Bashi
- 👤 Didier Tichit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:26
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/049
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
37 words
A bridged clay or laminated structure having between the layers bridges of at least one metallic oxide selected from the group consisting of oxides of aluminum and zirconium, wherein said bridged clay contains an oxide of cerium.
Claim 2
Dependent Claim
37 words
A bridged clay or laminated structure having between the layers bridges of at least one metallic oxide selected from the group consisting of oxides of aluminum and zirconium, wherein said bridged clay contains an oxide of cerium.
Claim 3
Dependent Claim
17 words
A clay according to claim 1, wherein said bridges of metallic oxides contains an oxide of cerium.
Claim 4
Dependent Claim
22 words
A clay according to claim 2 wherein said bridges of metallic oxide comprise from 10 to 50% of an oxide of cerium.
Claim 5
Dependent Claim
22 words
A clay according to claim 2 wherein said bridges of metallic oxide comprise from 20 to 40% of an oxide of cerium.
Claim 6
Dependent Claim
66 words
A clay according to claim 1 prepared by a process which comprises contacting a clay of layered structure with a composition prepared by cohydrolysis of a solution containing from 10 to 50 mole %, of a cerium salt and from 50 to 90 mole %, of an aluminum and/or zirconium salt, said mole percentage based on the moles of cerium, aluminum and zirconium in the solution.
Claim 7
Dependent Claim
63 words
A clay according to claim 2 prepared by contacting a clay of a layered structure of a composition prepared by cohydrolysis of a solution containing from 10 to 50 mole %, of a cerium salt and from 50 to 90 mole %, of an aluminum and/or zirconium salt, said mole percent based on the moles of cerium, aluminum and/or zirconium in the solution.
Claim 8
Dependent Claim
34 words
A clay according to claim 5 prepared by contacting the clay of a layered structure with a composition prepared by cohydrolysis of a solution containing 20 to 40 mole % of a cerium salt.
Claim 9
Dependent Claim
16 words
A clay according to claim 1 wherein the clay of laminated structure is a smectite type.
Claim 10
Dependent Claim
17 words
A clay according to claim 8 selected from the group consisting of bentonite, montmorillonite, beidellite and hectorite.
Claim 11
Dependent Claim
21 words
A clay according to claim 9, wherein the clay is selected from the group consisting of bentonite, montmorillonite, beidellite and hectorite.
References Cited (Backward Citations)
US3803026A
Cited
US4075126A
Cited
US4271043A
Cited
US4436832A
Cited
US4515901A
Cited
US4629713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-28 | 1991-12-28 | 1992-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-28 | 1995-12-28 | 1996-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-28 | 1999-12-28 | 2000-06-28 | $7700.00 | Window Closed / Lapsed |