US3696160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective hydrogenation of diolefins
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1970-03-26
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Granted: 1972-10-03
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Expires: 1990-03-26
Abstract
Abstract Diolefins, present in minor amounts, in gaseous feed streams, particularly those to be used in alkylation reactions are selectively converted to mono-olefins by hydrogenation over sulfided nickel-tungsten catalyst.
Inventors
- 👤 Karl D Chomyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:22
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/02; C07C5/03; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/755; C07C2523/76; C07C2523/84; C07C2523/85; C07C2523/888
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
15 words
The process of claim 1 in which the feed stream contains C3 and C4 diolefins.
Claim 2
Dependent Claim
19 words
The process of claim 1 in which the diolefin content of the feed stream is less than 2 percent.
Claim 3
Dependent Claim
19 words
The process of claim 1 in which the tungsten-to-nickel ratio is said catalyst is between about 4/1 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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |