Patent US3904552A successfully refreshed from Google Patents.
US3904552A
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US
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Dehyrogenation catalyst
Assignee: Girdler Chemical Inc
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Filing: 1973-03-08
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Granted: 1975-09-09
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Expires: 1993-03-08
Abstract
Abstract A molybdenum and cerium promoted iron oxide catalyst is unexpectedly superior in promoting the dehydrogenation of ethylbenzene to styrene.
Inventors
- 👤 Francis Joseph O'hara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:27
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8871; B01J37/00; B01J37/0009; B01J37/08; B01J37/10; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3332; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/745; C07C2523/76; C07C2523/83; C07C2523/84; C07C2523/85; C07C2523/88; C07C2523/881
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
75 words
A CATALYST FOR THE PRODUCTION OF AN OLEFINICALLY UNSATURATED HYDROCARBON OR PYRIDINE BY DEHYYDROGENATION OF THE CORRESPONDING MORE SATURATED COMPOUND CONSISTING ESSENTIALLY OF FROM ABOUT 30 TO ABOUT 90% OF IRON OXIDE, FROM ABOUT 1% TO ABOUT 40% OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE OXIDES, HYDROXIDES, CARBONATES AND BICARBONATES OF AN ALKALI METAL, FROM ABOUT 0.5% TO ABOUUT OF MOLYBDENIUM OXIDE AND FROM ABOUT 0.5 TO ABOUT 10% OF CERIUM OXIDE.
Claim 2
Dependent Claim
75 words
A CATALYST FOR THE PRODUCTION OF AN OLEFINICALLY UNSATURATED HYDROCARBON OR PYRIDINE BY DEHYYDROGENATION OF THE CORRESPONDING MORE SATURATED COMPOUND CONSISTING ESSENTIALLY OF FROM ABOUT 30 TO ABOUT 90% OF IRON OXIDE, FROM ABOUT 1% TO ABOUT 40% OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE OXIDES, HYDROXIDES, CARBONATES AND BICARBONATES OF AN ALKALI METAL, FROM ABOUT 0.5% TO ABOUUT OF MOLYBDENIUM OXIDE AND FROM ABOUT 0.5 TO ABOUT 10% OF CERIUM OXIDE.
Claim 3
Dependent Claim
20 words
The catalyst of claim 1 wherein the iron oxide constitutes from about 40% to about 90% of the total weight.
Claim 4
Dependent Claim
20 words
The catalyst of claim 1 wherein the cerium oxide is from about 2% to about 8% of the total weight.
Claim 5
Dependent Claim
20 words
The catalyst of claim 1 wherein the cerium oxide is from about 4% to about 6% of the total weight.
Claim 6
Dependent Claim
86 words
A catalyst for the production of an olefinically unsaturated hydrocarbon or pyridine by dehydrogenation of the corresponding more saturated compound consisting essentially of from about 30% to about 90% of iron oxide, from about 1% to about 40% of a compound selected from the group consisting of the oxides, hydroxides, carbonates, and bicarbonates of an alkali metal, from about 0.5% to about 5% of molybdenum oxide, and from about 0.5% to about 10% cerium oxide and from about 5% to about 30% of a binding agent.
Claim 7
Dependent Claim
86 words
A catalyst for the production of an olefinically unsaturated hydrocarbon or pyridine by dehydrogenation of the corresponding more saturated compound consisting essentially of from about 30% to about 90% of iron oxide, from about 1% to about 40% of a compound selected from the group consisting of the oxides, hydroxides, carbonates, and bicarbonates of an alkali metal, from about 0.5% to about 5% of molybdenum oxide, and from about 0.5% to about 10% cerium oxide and from about 5% to about 30% of a binding agent.
Claim 8
Dependent Claim
20 words
The catalyst of claim 1 wherein the molybdenum oxide is from about 2% to about 4% of the total weight.
Claim 9
Dependent Claim
20 words
The catalyst of claim 4 wherein the molybdenum oxide is from about 2% to about 4% of the total weight.
Claim 10
Dependent Claim
34 words
The catalyst of claim 5 wherein the cerium oxide is from about 2% to about 4% of the total weight and the binding agent includes from about 5% to about 30% of Portland cement.
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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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |