US4467046A
Expired / Lapsed
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Dehydrogenation catalyst
Assignee: Sued Chemie Inc
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Filing: 1982-01-07
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Granted: 1984-08-21
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Expires: 2002-01-07
Abstract
Abstract Catalysts found to be particularly effective in the dehydrogenation of alkyl aromatics, for example ethylbenzene to styrene, where the catalysts include iron oxide, 12 to 30% of an alkali metal compound, 3 to 7% of a cerium compound, 1.5 to 6.0% of a molybdenum compound and 1 to 8% of a calcium compound. Catalyst can also include 0 to 8.0% of a chromium compound.
Inventors
- 👤 James L. Smith
- 👤 Bill S. Masters
- 👤 Dennis J. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:54
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8872; C; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3332
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
79 words
A dehydrogenation catalyst including 15 to 30% by weight of a compound selected from the group consisting of the oxide and carbonate of an alkali metal 2% to 8% by weight of cerium oxide, 1.5 to 6.0% by weight of molybdenum oxide, 1 to 8% by weight of a compound selected from the group consisting of the oxide and carbonate of calcium and the balance iron oxide for the dehydrogenation of organic alkyl materials to correspondingly less saturated materials.
Claim 2
Dependent Claim
79 words
A dehydrogenation catalyst including 15 to 30% by weight of a compound selected from the group consisting of the oxide and carbonate of an alkali metal 2% to 8% by weight of cerium oxide, 1.5 to 6.0% by weight of molybdenum oxide, 1 to 8% by weight of a compound selected from the group consisting of the oxide and carbonate of calcium and the balance iron oxide for the dehydrogenation of organic alkyl materials to correspondingly less saturated materials.
Claim 3
Dependent Claim
15 words
The catalyst of claim 1 including 2 to 8.0% by weight of a chromium oxide.
Claim 4
Dependent Claim
12 words
The catalyst of claim 1 wherein the alkali metal is potassium carbonate.
Claim 5
Dependent Claim
12 words
The catalyst of claim 1 wherein the calcium compound is calcium carbonate.
Claim 6
Dependent Claim
12 words
The catalyst of claim 1 wherein the calcium compound is calcium oxide.
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) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |