US4631315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation of nitrile group-containing unsaturated polymers
Assignee: Bayer AG
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Filing: 1985-09-03
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Granted: 1986-12-23
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Expires: 2005-09-03
Abstract
Abstract Nitrile group-containing polymers are hydrogenated in a homogeneous phase with preservation of the nitrile groups in a low molecular weight ketone as a solvent and with a compound corresponding to formula RuX[(L.sub.1)(L.sub.2).sub.n ] as a catalyst, wherein X represents hydrogen, halogen L 1 represents hydrogen, halogen, optionally substituted cyclopentadienyl, L 2 represents a phosphane, bisphosphane or arsane and n is 1, 2 or 3 and [(L 1 )(L 2 ) n ] represents a cyclopentadienyl bisphosphane.
Inventors
- 👤 Hartmuth Buding
- 👤 Paul Fiedler
- 👤 Heinrich Konigshofen
- 👤 Joachim Thormer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:32
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
163 words
In a process for the hydrogenation of at least 80% of olefinic bonds contained in an unsaturated copolymer derived from: 85 to 50%, by weight, conjugated diene, 15 to 50%, by weight, unsaturated nitrile, 0 to 10%, by weight, of a monomer copolymerizable with the conjugated diene and the unsaturated nitrile, with preservation of the nitrile groups, the improvement comprising, hydrogenating in the presence of a low molecular weight ketone solvent with a catalyst of the formula RuX[(L.sub.1)(L.sub.2).sub.n ] wherein X is hydrogen or halogen, L 1 is hydrogen, halogen, cyclopentadienyl, or methyl, ethyl or phenyl substituted cyclopentadienyl, L 2 is a phosphane, bisphosphane or arsane, n is 1, 2 or 3, or [(L 1 )(L 2 ) n ] is a cyclopentadienyl-bisphosphane, where the concentration of the catalyst, calculated as Ruthenium and based on the unsaturated polymer, is from 10 to 1000 ppm and the concentration of the unsaturated copolymer, based on the total solution, is from 1 to 99% by weight.
Claim 2
Dependent Claim
163 words
In a process for the hydrogenation of at least 80% of olefinic bonds contained in an unsaturated copolymer derived from: 85 to 50%, by weight, conjugated diene, 15 to 50%, by weight, unsaturated nitrile, 0 to 10%, by weight, of a monomer copolymerizable with the conjugated diene and the unsaturated nitrile, with preservation of the nitrile groups, the improvement comprising, hydrogenating in the presence of a low molecular weight ketone solvent with a catalyst of the formula RuX[(L.sub.1)(L.sub.2).sub.n ] wherein X is hydrogen or halogen, L 1 is hydrogen, halogen, cyclopentadienyl, or methyl, ethyl or phenyl substituted cyclopentadienyl, L 2 is a phosphane, bisphosphane or arsane, n is 1, 2 or 3, or [(L 1 )(L 2 ) n ] is a cyclopentadienyl-bisphosphane, where the concentration of the catalyst, calculated as Ruthenium and based on the unsaturated polymer, is from 10 to 1000 ppm and the concentration of the unsaturated copolymer, based on the total solution, is from 1 to 99% by weight.
Claim 3
Dependent Claim
22 words
A process according to claim 1, wherein X is chlorine, L 1 is hydrogen or chlorine and L 2 is a triarylphosphane.
Claim 4
Dependent Claim
21 words
A process according to claim 1, wherein X is hydrogen or chlorine, L 1 is cyclopentadienyl and L 2 is triarylphosphane.
Claim 5
Dependent Claim
14 words
A process according to claim 1, where 100% of the olefinic bonds are hydrogenated.
Claim 6
Dependent Claim
31 words
A process according to claim 1, wherein the hydrogenation is carried out at a temperature of from 80° to 200° C. and a pressure of from 20 to 350 bar hydrogen.
References Cited (Backward Citations)
US2585583A
Cited
US3366646A
Cited
US3766300A
Cited
US3898208A
Cited
US3994868A
Cited
US4486480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |