Patent US4544718A successfully refreshed from Google Patents.
US4544718A
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US
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Olefin polymerization
Assignee: Phillips Petroleum Co
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Filing: 1984-09-13
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Granted: 1985-10-01
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Expires: 2004-09-13
Abstract
Abstract A process for producing a novel-highly active lanthanide containing catalyst comprising the product formed by admixing a lanthanide hydroxyhalide and an electron donor bidentate organic ligand chosen from among diamines, dihydric alcohols, and diketones with an organoaluminum cocatalyst component and its use in the polymerization of olefins, especially olefins such as ethylene and 1,3-butadiene.
Inventors
- 👤 Gene H. C. Yeh
- 👤 Joel L. Martin
- 👤 Henry L. Hsieh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:40
CPC Classifications
C; C08; C08F; C08F10/00; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
64 words
A process for the polymerization of olefins which comprises contacting at least one olefin under polymerization conditions with a catalyst composition comprising a component A formed by admixing a rare earth metal hydroxyhalide and an electron donor bidentate organic ligand having from 2 to about 20 carbon atoms selected from among diamines, dihydric alcohols, and diketones, and a component B comprising an organoaluminum compound.
Claim 2
Dependent Claim
64 words
A process for the polymerization of olefins which comprises contacting at least one olefin under polymerization conditions with a catalyst composition comprising a component A formed by admixing a rare earth metal hydroxyhalide and an electron donor bidentate organic ligand having from 2 to about 20 carbon atoms selected from among diamines, dihydric alcohols, and diketones, and a component B comprising an organoaluminum compound.
Claim 3
Dependent Claim
13 words
A process according to claim 1 wherein the olefin comprises a conjugated diene.
Claim 4
Dependent Claim
16 words
A process according to claim 2 wherein the conjugated diene comprises 1,3-butadiene, isoprene, trans-1,3-pentadiene, or 2,3-dimethylbutadiene.
Claim 5
Dependent Claim
11 words
A process according to claim 1 wherein the olefin comprises ethylene.
Claim 6
Dependent Claim
53 words
A process according to claim 1 wherein said component A is formed by admixing a rare earth metal hydroxyhalide compound having the formula Ln(OH).sub.a X.sub.3-a wherein Ln is a rare earth metal, X is a halogen and a ranges from about 0.1 to about 2.9 with an aliphatic or aromatic polyamine bidentate ligand.
Claim 7
Dependent Claim
26 words
A process according to claim 5 wherein said hydroxyhalide is neodymium hydroxychloride of the formula Nd(OH) 2 .4 Cl 0 .6 and said amine is ethylenediamine.
Claim 8
Dependent Claim
18 words
A process according to claim 6 wherein said organoaluminum cocatalyst is diethylaluminum hydride, diisobutylaluminum hydride, triethylaluminum, or triisobutylaluminum.
Claim 9
Dependent Claim
13 words
A process according to claim 7 wherein said olefin is 1,3-butadiene or ethylene.
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) | 1988-09-30 | 1989-04-01 | 1989-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-30 | 1993-04-01 | 1993-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-30 | 1997-04-01 | 1997-10-01 | $7700.00 | Window Closed / Lapsed |