US3959239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of nickel cyclooctadiene as a hydrogenation catalyst
Assignee: Mobil Oil AS
•
Filing: 1975-05-05
•
Granted: 1976-05-25
•
Expires: 1995-05-05
Abstract
Abstract A process for the hydrogenation of hydrocarbon materials having olefinic unsaturation and/or olefinic-aromatic unsaturation, and particularly wherein hydrogenation is carried out at relatively low catalyst levels and mild reaction conditions whereby olefinic bonds are reduced and, when components of the reaction mixture contain aromatic unsaturation, to effect selective hydrogenation of olefinic bonds, without substantial, if any, hydrogenation of aromatic unsaturation; said process comprising contacting such hydrocarbon materials under hydrogenation reaction conditions of temperature and pressure in the presence of bis(1,5-cyclooctadiene) nickel as the hydrogenation catalyst.
Inventors
- 👤 Stephen A. Butter
- 👤 James G. Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:24
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/02; C07; C07C; C07C5/00; C07C5/02; C07C5/03; C08F; C08F8/00; C08F8/04; C07C2531/00; C07C2531/16; C07C2531/22
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
67 words
A process for hydrogenating hydrocarbon materials having olefinic unsaturation and/or olefinic-aromatic unsaturation whereby olefinic bonds are reduced and when components of the reaction mixture contain aromatic unsaturation selective hydrogenation of olefinic bonds is effected without substantial, if any, hydrogenation of aromatic unsaturation; said process comprising contacting such hydrocarbon materials under hydrogenation reaction conditions of temperature and pressure in the presence of bis (1,5-cyclooctadiene) nickel as hydrogenation catalyst.
Claim 2
Dependent Claim
67 words
A process for hydrogenating hydrocarbon materials having olefinic unsaturation and/or olefinic-aromatic unsaturation whereby olefinic bonds are reduced and when components of the reaction mixture contain aromatic unsaturation selective hydrogenation of olefinic bonds is effected without substantial, if any, hydrogenation of aromatic unsaturation; said process comprising contacting such hydrocarbon materials under hydrogenation reaction conditions of temperature and pressure in the presence of bis (1,5-cyclooctadiene) nickel as hydrogenation catalyst.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein the hydrocarbon material is a copolymer derived from styrene and butadiene.
Claim 4
Dependent Claim
25 words
The process of claim 2 wherein that portion of the copolymer attributable to butadiene is reduced while that portion attributable to styrene is substantially unhydrogenated.
Claim 5
Dependent Claim
14 words
The process of claim 1 wherein the hydrocarbon material has alpha- or internal-olefinic unsaturation.
Claim 6
Dependent Claim
27 words
The process of claim 1 wherein the reaction temperature is from about 50° to about 65°C and the pressure is from about atmospheric to about 500 psig.
Claim 7
Dependent Claim
20 words
The process of claim 5 wherein the reaction temperature is from about 55°-60°C and the pressure is about 400 psig.
Claim 8
Dependent Claim
17 words
The process of claim 1 wherein the nickel catalyst is stabilized by minor amounts of triphenyl phosphine.
Claim 9
Dependent Claim
22 words
The process of claim 7 wherein the nickel catalyst is stabilized by from about 0.1:1-0.1:0.5 mole of phosphine per mole of catalyst.
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) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |