US3947510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation of linear hydrocarbon diolefins to linear hydrocarbon olefins
Assignee: SnamProgetti SpA
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Filing: 1974-12-30
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Granted: 1976-03-30
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Expires: 1994-12-30
Abstract
Abstract A process is described whereby a linear hydrocarbon diolefin is selectively hydrogenated to a linear hydrocarbon olefin in the presence of a palladium base catalyst by adding to the reaction mixture an aqueous solution of a zinc salt such as zinc acetate wherein the ratio of water/zinc is at least 1/1 by weight.
Inventors
- 👤 Morello Morelli
- 👤 Fortunato De Marco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:02
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/02; C07C5/03; C07C5/05; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/44; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/06; C07C2527/138; C07C2527/24; C07C2527/25; C07C2531/00; C07C2531/02; C07C2531/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
67 words
A process of hydrogenating a linear hydrocarbon diolefin by contacting said linear hydrocarbon diolefin with hydrogen in the presence of a palladium base catalyst, wherein the improvement comprises increasing the selectivity of the hydrogenation of said linear hydrocarbon diolefin to linear hydrocarbon olefin by adding to the hydrogenation mixture an aqueous solution of a zinc salt having a ratio of water/zinc of at least 1/1 by weight.
Claim 2
Dependent Claim
67 words
A process of hydrogenating a linear hydrocarbon diolefin by contacting said linear hydrocarbon diolefin with hydrogen in the presence of a palladium base catalyst, wherein the improvement comprises increasing the selectivity of the hydrogenation of said linear hydrocarbon diolefin to linear hydrocarbon olefin by adding to the hydrogenation mixture an aqueous solution of a zinc salt having a ratio of water/zinc of at least 1/1 by weight.
Claim 3
Dependent Claim
30 words
A process of hydrogenating a linear hydrocarbon diolefin according to claim 1, wherein the amount of said zinc salt is from 0.01 to 5% by weight of the linear diolefin.
Claim 4
Dependent Claim
33 words
A process of hydrogenating a linear hydrocarbon diolefin according to claim 1, wherein the hydrogenation is carried out at temperatures ranging from 20° to 60°C and at pressures between 1 and 50 atmospheres.
Claim 5
Dependent Claim
40 words
A process of hydrogenating a linear hydrocarbon diolefin according to claim 1, wherein the hydrogenation is carried out in the presence of an amine compound in the amount of not more than 0.5% by weight of the linear hydrocarbon diolefin.
Claim 6
Dependent Claim
18 words
A process of hydrogenating a linear hydrocarbon diolefin according to claim 4, wherein the amine compound is ammonia.
Claim 7
Dependent Claim
35 words
A process of hydrogenating a linear hydrocarbon diolefin according to claim 1, wherein the zinc salt is a member of the group consisting of zinc chloride, zinc sulfate, zinc nitrate, zinc acetate and zinc oxalate.
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) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |