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US4409410A
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Process for selectively hydrogenating a di-olefin in a mixture of hydrocarbons having at least 4 carbon atoms and comprising an α-olefin
Assignee: INSTTUT FRANCAIS DU PETROLE RUEIL-MALMAISON
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Filing: 1982-02-09
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Granted: 1983-10-11
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Expires: 2002-02-09
Abstract
Abstract Process for selectively hydrogenating a diolefin present in a mixture of hydrocarbons having at least 4 carbon atoms per molecule: the hydrocarbon mixture is reacted with hydrogen in contact with a catalyst comprising palladium and silver, the molar ratio of hydrogen to the diolefin being from 1:1 to 5:1.
Inventors
- 👤 Jean Cosyns
- 👤 Daniel Durand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:33
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/02; C07C11/08; C10; C10G; C10G45/00; C10G45/32; C10G45/34; C10G45/40; B; B01; B01J; B01J23/00; B01J23/38; B01J23/48; B01J23/50; C07C5/00; C07C5/02; C07C5/03; C07C7/00; C07C7/148; C07C7/163; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/44; C07C2523/48; C07C2523/50
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
104 words
In a process for selectively hydrogenating a diolefin present in a mixture of hydrocarbons having at least 4 carbon atoms and comprising an 1-olefin in addition to the diolefin, wherein said mixture is reacted with hydrogen in contact with a catalyst, the improvement wherein said catalyst is a supported catalyst comprising simultaneously palladium or a palladium compound and silver or a silver compound, the palladium content of the catalyst being from 0.05 to 0.5% by weight and the silver content from 0.05 to 1% by weight, the ##EQU1## being from 0.7:1 to 3:1 by weight, thereby avoiding substantial isomerization and hydrogenation of the 1-olefin.
Claim 2
Dependent Claim
104 words
In a process for selectively hydrogenating a diolefin present in a mixture of hydrocarbons having at least 4 carbon atoms and comprising an 1-olefin in addition to the diolefin, wherein said mixture is reacted with hydrogen in contact with a catalyst, the improvement wherein said catalyst is a supported catalyst comprising simultaneously palladium or a palladium compound and silver or a silver compound, the palladium content of the catalyst being from 0.05 to 0.5% by weight and the silver content from 0.05 to 1% by weight, the ##EQU1## being from 0.7:1 to 3:1 by weight, thereby avoiding substantial isomerization and hydrogenation of the 1-olefin.
Claim 3
Dependent Claim
16 words
A process according to claim 1, wherein the hydrogen/diolefin molar ratio is from 1/1 to 2/1.
Claim 4
Dependent Claim
16 words
A process according to claim 1 wherein the ##EQU2## is from 1:1 to 2.5:1 by weight.
Claim 5
Dependent Claim
20 words
A process according to claim 1, wherein the carrier is alumina of specific surface lower than 100 m 2 /g.
Claim 6
Dependent Claim
21 words
A process according to claim 1, wherein the carrier is silica of specific surface between 10 and 200 m 2 /g.
Claim 7
Dependent Claim
19 words
A process according to claim 1 wherein the hydrocarbon mixture is a C 4 cut comprising butadiene and 1-butene.
Claim 8
Dependent Claim
36 words
A process according to claim 1 wherein the operation is effected in liquid phase at 0°-80° C. under 3-20 bars at a liquid feed rate of 2 to 50 volumes per volume of catalyst per hour.
Claim 9
Dependent Claim
30 words
A process according to claim 1 wherein the catalyst is obtained by incorporating the palladium and silver catalytic metals to the carrier and then calcining in air at 200°-900° C.
Claim 10
Dependent Claim
17 words
A process according to claim 8, wherein calcining is followed with a hydrogen reduction at 0°-200° C.
Claim 11
Dependent Claim
16 words
A process according to claim 1, wherein the hydrogen/diolefin molar ratio is from 1/1 to 5/1.
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) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |