US4547600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for selectively hydrogenating acetylenic hydrocarbons of a C4 hydrocarbon cut containing butadiene
Assignee: Pro Catalyse SA
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Filing: 1983-11-23
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Granted: 1985-10-15
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Expires: 2003-11-23
Abstract
Abstract Process for the selective hydrogenation of the acetylenic hydrocarbons of a C 4 hydrocarbons cut, containing butadiene and at least 1% by weight of acetylenic hydrocarbons, without substantial hydrogenation of butadiene, wherein said hydrocarbons cut in liquid phase and hydrogen are contacted with a supported catalyst containing 0.05 to 0.5% by weight of palladium and 0.05 to 1% by weight of silver, the Ag/Pd ratio by weight being at least 0.7.
Inventors
- 👤 Jean Cosyns
- 👤 Jean-Paul Boitiaux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:12
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/02; C07C5/08; B; B01; B01J; B01J23/00; B01J23/38; B01J23/48; B01J23/50; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/44; C07C2523/48; C07C2523/50; C10; C10G; C10G2400/00; C10G2400/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
In a process for the selective catalytic hydrogenation of the acetylenic hydrocarbons of a C 4 hydrocarbon cut containing a substantial quantity of butadiene and at least 1% by weight of acetylenic hydrocarbons, without substantial hydrogenation of butadiene, wherein said hydrocarbon cut in the liquid phase and hydrogen are contacted with a supported catalyst under hydrogenation conditions selective for hydrogenating said acetylenic hydrocarbons without substantial hydrogenation of butadiene, the improvement wherein said supported catalyst consists essentially of a carrier, 0.05 to 0.5% by weight of palladium and 0.05 to 1% by weight of silver, with the further provision that the Ag/Pd ratio by weight is at least 0.7, thus increasing the life of the selectivity of the catalyst.
Claim 2
Dependent Claim
118 words
In a process for the selective catalytic hydrogenation of the acetylenic hydrocarbons of a C 4 hydrocarbon cut containing a substantial quantity of butadiene and at least 1% by weight of acetylenic hydrocarbons, without substantial hydrogenation of butadiene, wherein said hydrocarbon cut in the liquid phase and hydrogen are contacted with a supported catalyst under hydrogenation conditions selective for hydrogenating said acetylenic hydrocarbons without substantial hydrogenation of butadiene, the improvement wherein said supported catalyst consists essentially of a carrier, 0.05 to 0.5% by weight of palladium and 0.05 to 1% by weight of silver, with the further provision that the Ag/Pd ratio by weight is at least 0.7, thus increasing the life of the selectivity of the catalyst.
Claim 3
Dependent Claim
15 words
A process according to claim 1 wherein said Ag/Pd ratio is from 0.8 to 5.
Claim 4
Dependent Claim
23 words
A process according to claim 1 or 2, wherein the catalyst carrier is an alumina of a surface from 1 to 50 m2/g.
Claim 5
Dependent Claim
31 words
A process according to claim 1 or 2, wherein the C 4 cut contains from 30 to 70% by weight of 1,3-butadiene and from 1 to 10% by weight of vinylacetylene.
Claim 6
Dependent Claim
29 words
A process according to claims 1 or 2, wherein the palladium content by weight is from 0.1 to 0.5% and the silver content by weight from 0.1 to 0.5%.
Claim 7
Dependent Claim
44 words
A process according to claim 1, wherein the hydrogenation conditions are: a temperature of 0° to 80° C., a pressure of 3 to 20 bars, and a flow rate of 2 to 50 volumes of C 4 cut per volume of catalyst per hour.
Claim 8
Dependent Claim
21 words
A process according to claim 1 or claim 6, wherein the molar ratio of hydrogen:acetylenic hydrocarbons is 1:1 to 5:1, respectively.
Claim 9
Dependent Claim
14 words
A process according to claim 1, wherein said Ag/Pd ratio is at least 1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-14 | 1989-04-15 | 1989-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-14 | 1993-04-15 | 1993-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-14 | 1997-04-15 | 1997-10-15 | $7700.00 | Window Closed / Lapsed |