Patent US3674888A successfully refreshed from Google Patents.
US3674888A
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Process for selectively hydrogenating unsaturated hydrocarbons
Assignee: IFP Energies nouvelles
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Filing: 1970-12-08
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Granted: 1972-07-04
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Expires: 1990-12-08
Abstract
Abstract This invention relates to a process for selectively hydrogenating unsaturated hydrocarbons in the liquid phase, in the presence of a catalyst comprising palladium on an alumina carrier, said catalyst resulting from contacting alumina agglomerates of at least a 120 m2/g specific surface with steam at 110* - 300* C. for at least 15 minutes, drying the resulting agglomerates, heating them to a temperature from 500* to 1,200* C., so as to obtain alumina agglomerates of a 40 - 100 m2/g specific surface, admixing said agglomerates with a palladium compound and heating up the resulting mixture to 300* - 600* C.
Inventors
- 👤 Michel Derrien
- 👤 Jean Francois Le Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:07
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/02; C07C5/08; B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/44; B01J21/00; B01J21/02; B01J21/04; B01J37/00; B01J37/02; B01J37/03; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/44
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
17 words
A process according to claim 1, further comprising contacting the resulting catalyst with hydrogen at 20*-200* C.
Claim 2
Dependent Claim
28 words
A process according to claim 1, wherein the initial alumina agglomerates have a specific surface of 120 to 400 m2/g and sizes ranging from 0.5 to 20 mm.
Claim 3
Dependent Claim
19 words
A process according to claim 1 wherein said alumina agglomerates are contacted with steam for 0.25 to 24 hours.
Claim 4
Dependent Claim
22 words
A process according to claim 1 wherein said resulting agglomerates are heated to 500* - 1,200* C. for 0.25 to 24 hours.
Claim 5
Dependent Claim
24 words
A process according to claim 1, wherein the palladium is used in a proportion from 0.1 to 10 g per 100 g of alumina.
Claim 6
Dependent Claim
25 words
A process according to claim 1, wherein the heating to 300* -600* C. is carried out in the presence of a molecular oxygen-containing gas .
References Cited (Backward Citations)
US3116342A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |