US3644564A
Expired / Lapsed
US
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Ethylene oligomerization in the presence of complex nickel-fluorine-containing catalysts
Assignee: Shell USA Inc
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Filing: 1969-12-19
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Granted: 1972-02-22
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Expires: 1989-12-19
Abstract
Abstract ETHYLENE IS OLIGOMERIZED TO A MIXTURE OF LINEAR OLEFINIC PRODUCTS IN THE PRESENCE OF AN ORGANOALUMINUM-FREE CATALYST WHICH IS THE PRODUCT OF THE REACTION OF A NICKEL COMPOUND WHICH IS AN ATOM OF NICKEL IN COMPLEX WITH AN OLEFINICALLY UNSATURATED COMPOUND WITH A FLUORINE-CONTAINING LIGAND. THE PREFERRED NICKEL COMPOUND IS BICYCLOOCTADIENE-1,5-NICKEL. THE FLUORINE-CONTAINING LIGANDS ARE SELECTED FROM THE GROUP CONSISTING OF TRIFLUOROACETIC ACID, 4,4,4RO-PROPENE, HEXAFLUOROACETYLACETONE AND TRIFLUOROACETYLACETONE.
Inventors
- 👤 Henry Van Zwet
- 👤 Ronald S Bauer
- 👤 Wilhelm Keim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:55
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2/32; C07C2/34; C07C2531/00; C07C2531/16; C07C2531/22
Claims Analysis
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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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |