US4882417A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of olefin/CO copolymer with controlled addition of catalyst composition
Assignee: Shell USA Inc
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Filing: 1989-02-09
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Granted: 1989-11-21
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Expires: 2009-02-09
Abstract
Abstract An improved process for the production of polyketone polymers in the presence of a catalyst composition formed from a palladium compound, the anion of certain strong acids and certain bidentate ligands comprises the provision of a controlled proportion of the catalyst composition at the outset of polymerization and providing the remainder of the catalyst composition only when the polymer concentration in the product-containing suspension has reached a minimum value.
Inventors
- 👤 Maarten M. Geuze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:28
CPC Classifications
C; C08; C08G; C08G67/00; C08G67/02; C08G85/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
127 words
In the process of producing a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon by contacting under polymerization conditions a reaction mixture of the carbon monoxide and hydrocarbon in the prsence of a catalyst composition formed from a palladium compound, the anion of a non-hydrohalogenic acid having a pKa below about 6 and a bidentate ligand of phosphorus and a polymerization diluent, the improvement which comprises providing to the reaction mixture from about 25% to about 85% of the catalyst composition at the outset of polymerization and subsequently providing the remainder of the catalyst composition when the concentration of polymer product has reached a value of at least 0.2 g per 100 g of the suspension of the polymer in the diluent.
Claim 2
Dependent Claim
127 words
In the process of producing a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon by contacting under polymerization conditions a reaction mixture of the carbon monoxide and hydrocarbon in the prsence of a catalyst composition formed from a palladium compound, the anion of a non-hydrohalogenic acid having a pKa below about 6 and a bidentate ligand of phosphorus and a polymerization diluent, the improvement which comprises providing to the reaction mixture from about 25% to about 85% of the catalyst composition at the outset of polymerization and subsequently providing the remainder of the catalyst composition when the concentration of polymer product has reached a value of at least 0.2 g per 100 g of the suspension of the polymer in the diluent.
Claim 3
Dependent Claim
37 words
The process of claim 1 wherein no more than 50% of the catalyst composition is provided at the outset of polymerization and the remainder of the catalyst composition is subsequently provided in at least two additional portions.
Claim 4
Dependent Claim
32 words
The process of claim 2 wherein the remainder of the catalyst composition is provided when the polymer concentration reaches a value of at least 1.0 g per 100 g of polymer-containing suspension.
Claim 5
Dependent Claim
29 words
The process of claim 2 wherein the amount of each subsequent catalyst composition addition is in an amount no more than half the amount of catalyst composition previously provided.
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) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-20 | 2001-05-22 | 2001-11-21 | $7700.00 | Window Closed / Lapsed |