Patent US4291184A successfully refreshed from Google Patents.
US4291184A
Expired / Lapsed
US
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Process for producing tertiary-butylstyrene
Assignee: El Paso Products Co
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Filing: 1980-01-29
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Granted: 1981-09-22
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Expires: 2000-01-29
Abstract
Abstract This invention provides an improved oxydehydrogenation process for the production of tertiary-butylstyrene which involves the contacting of a vapor phase mixture of tertiary-butylethylbenzene and oxygen with a novel coprecipitated nickel-zirconium phosphate or nickel-zirconium-cerium phosphate catalyst composition. The tertiary-butylstyrene is produced with a high conversion selectivity, and concomitantly there is little or no dialkenylbenzene byproducts produced.
Inventors
- 👤 Glen F. Crum
- 👤 Samuel J. Paton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:58
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/185; B01J27/1853; C; C07; C07C; C07C5/00; C07C5/42; C07C5/48
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
101 words
A process for the production of tertiary-butylstyrene under moderate oxydehydrogenation conditions which comprises contacting a feed mixture of tertiary-butylethylbenzene and oxygen with a coprecipitated nickel-zirconium-cerium phosphate catalyst, wherein the cerium metal is in the plus three valence state, and the nickel, zirconium and cerium metal elements, respectively, are present in the catalyst in an atomic ratio of about 5-20:1:1 and the phosphate component is present in a sufficient quantity to satisfy the valences of the metal elements, and wherein the conversion selectivity to tertiary-butylstyrene is at least 80 mole percent, and the conversion selectivity to divinylbenzene is essentially zero mole percent.
Claim 2
Dependent Claim
101 words
A process for the production of tertiary-butylstyrene under moderate oxydehydrogenation conditions which comprises contacting a feed mixture of tertiary-butylethylbenzene and oxygen with a coprecipitated nickel-zirconium-cerium phosphate catalyst, wherein the cerium metal is in the plus three valence state, and the nickel, zirconium and cerium metal elements, respectively, are present in the catalyst in an atomic ratio of about 5-20:1:1 and the phosphate component is present in a sufficient quantity to satisfy the valences of the metal elements, and wherein the conversion selectivity to tertiary-butylstyrene is at least 80 mole percent, and the conversion selectivity to divinylbenzene is essentially zero mole percent.
Claim 3
Dependent Claim
23 words
A process in accordance with claim 1 wherein the feed mixture contains between about 0.2-5 moles of molecular oxygen per mole of tertiary-butylethylbenzene.
Claim 4
Dependent Claim
16 words
A process in accordance with claim 1 wherein the feed mixture contains a gaseous inert diluent.
Claim 5
Dependent Claim
23 words
A process in accordance with claim 1 wherein the feed mixture contains nitrogen and/or carbon dioxide and/or steam as a gaseous inert diluent.
Claim 6
Dependent Claim
28 words
A process in accordance with claim 1 wherein the contact time between the feed stream and the catalyst is in the range between about 0.5 and 20 seconds.
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) | 1984-09-21 | 1985-03-23 | 1985-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-21 | 1989-03-23 | 1989-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-21 | 1993-03-23 | 1993-09-22 | $7700.00 | Window Closed / Lapsed |