Patent US4820802A successfully refreshed from Google Patents.
US4820802A
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Improved process of preparing carbon monoxide/olefin copolymer with ortho substituted phosphine catalyst composition.
Assignee: Shell USA Inc
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Filing: 1987-12-21
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Granted: 1989-04-11
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Expires: 2007-12-21
Abstract
Abstract Linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon are produced in the presence of a novel catalyst composition formed from a palladium compound, the anion of a non-hydrohalogenic acid having a pKa less about 4 and an orthosubstitued phenyl phosphine.
Inventors
- 👤 Eit Drent
- 👤 Richard L. Wife
- 👤 Petrus W. N. M. VAN Leeuwen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:18
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/24; B01J31/2404; B01J31/2442; B01J31/2447; B01J31/02; B01J31/0215; B01J31/0225; B01J31/04; C; C08; C08G; C08G67/00; C08G67/02; B01J2231/00; B01J2231/10; B01J2231/12; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/824
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
In the process of producing a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon in the presence of a catalyst composition formed from a palladium compound and a phosphine ligand, the improvement which comprises employing in the catalyst composition the anion of a non-hydrohalogenic acid having a pKa less than about 4 and an ortho-substituted triphenylphosphine.
Claim 2
Dependent Claim
61 words
In the process of producing a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon in the presence of a catalyst composition formed from a palladium compound and a phosphine ligand, the improvement which comprises employing in the catalyst composition the anion of a non-hydrohalogenic acid having a pKa less than about 4 and an ortho-substituted triphenylphosphine.
Claim 3
Dependent Claim
45 words
The process of claim 1 wherein the ortho-substituted triphenylphosphine is represented by the formula ##STR2## wherein R is alkyl, halo, cyano, hydroxy, alkoxy or carbalkoxy and R' is hydrogen or taken together with R form a hydrocarbon bridge of from 2 to 4 carbons inclusive.
Claim 4
Dependent Claim
17 words
The process of claim 2 wherein the anion is the anion of trifluoroacetic acid or p-toluenesulfonic acid.
Claim 5
Dependent Claim
10 words
The process of claim 2 wherein the phosphine is tri(o-tolyl)phosphine.
Claim 6
Dependent Claim
10 words
The process of claim 2 wherein the phosphine is tri(2-methoxyphenyl)phosphine.
Claim 7
Dependent Claim
10 words
The process of claim 2 wherein the phosphine is tri(1-naphthyl)phosphine.
Claim 8
Dependent Claim
14 words
The process of claim 6 wherein the anion is the anion of p-toluenesulfonic acid.
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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) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |