US3670041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation process
Assignee: CAIN CHEMICAL Inc
•
Filing: 1970-06-10
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Granted: 1972-06-13
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Expires: 1990-06-10
Abstract
Abstract An improved method for the selective hydrogenation of olefinic unsaturated impurities present in an aromatic hydrocarbon feed which comprises contacting the aromatic hydrocarbon feed with a suitable selective hydrogenation catalyst and hydrogen under hydrogenation conditions until the activity of the catalyst is diminished, subsequently rejuvenating the catalyst with hydrogen and a hydrocarbon liquid at elevated temperatures and thereafter contacting the regenerated catalyst with additional quantities of the aromatic hydrocarbon feed.
Inventors
- 👤 William G Juhl
- 👤 Roland Libers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:26
CPC Classifications
C; C10; C10G; C10G45/00; C07; C07C; C07C7/00; C07C7/148; C07C7/163; C10G2400/00; C10G2400/02; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
28 words
The process of claim 1 wherein said catalyst comprises a metal of Group VIII of the Periodic Table of Elements having an atomic number of at least 27.
Claim 2
Dependent Claim
13 words
The process of claim 2 wherein said catalyst comprises palladium supported on alumina.
Claim 3
Dependent Claim
15 words
The process of claim 3 wherein said aromatic hydrocarbon feed comprises a C6-C9 cracked-oil fraction.
Claim 4
Dependent Claim
20 words
The process of claim 4 wherein said hydrocarbon liquid comprises the product from the hydrogenation of a C6-C9 cracked-oil fraction.
Claim 5
Dependent Claim
15 words
The process of claim 3 wherein said aromatic hydrocarbon feed comprises a naphthalene concentrate feed.
Claim 6
Dependent Claim
20 words
The process of claim 6 wherein said hydrocarbon liquid comprises the product from the hydrogenation of a naphthalene concentrate feed.
Claim 7
Dependent Claim
14 words
The process of claim 1 wherein said catalyst comprises a cobalt oxide-molybdenum oxide catalyst.
Claim 8
Dependent Claim
57 words
The process of claim 8 wherein said cobalt oxide-molybdenum oxide catalyst is one comprising from about 1% to 5% by weight cobalt and from about 5% to about 20% by weight molybdenum and is on a support selected from the group consisting of alumina and silica alumina in which the silica is present in a minor amount.
Claim 9
Dependent Claim
24 words
The process of claim 9 wherein said aromatic hydrocarbon feedstock comprises a C6-C9 feed obtained from the cracking of petroleum condensates and the like.
Claim 10
Dependent Claim
15 words
The process of claim 10 wherein said hydrocarbon liquid comprises a hydrogenated C6-C9 cracked-oil fraction.
Claim 11
Dependent Claim
15 words
The process of claim 9 wherein said aromatic hydrocarbon feed comprises a naphthalene concentrate feed.
Claim 12
Dependent Claim
20 words
The process of claim 12 wherein said hydrocarbon liquid comprises the product from the hydrogenation of a naphthalene concentrate feed.
References Cited (Backward Citations)
US1955253A
Cited
US3113097A
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US3277199A
Cited
US3429804A
Cited
US3505206A
Cited
US3505207A
Cited
US3565820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |