US2964579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective hydrogenation of diolefins with copper chromite catalyst
Assignee: Houdry Process Corp
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Filing: 1958-10-09
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Granted: 1960-12-13
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Expires: 1978-10-09
Abstract
No abstract record available.
Inventors
- 👤 Kirsch Francis William
- 👤 Sol W Weller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:35
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/02; C07C5/03; C07C2523/00; C07C2523/70; C07C2523/72; C07C2523/76; C07C2523/84; C07C2523/85; C07C2523/86
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
THE METHOD OF SELECTIVELY HYDROGENATING DIOLEFINS PRESENT IN MINOR QUANTITY IN A MIXED HYDROCARBON STREAM COMPOSED ESSENTIALLY OF HYDROCARBONS IN THE RANGE OF 4-5 CARBON ATOMS, SAID STREAM ALSO CONTAINING MONOOLEFINS, WHICH METHOD COMPRISES SUBJECTING SUCH MIXED STREAM WITH ADDED HYDROGEN TO CONTACT WITH ACTIVE COPPER CHROMITE CATALYST HAVING AN INITIAL SURFACE AREA OF NOT LESS THAN 50 SQUARE METERS PER GRAM, SAID CONTACT BEING EFFECTED AT TEMPERATURES IN THE RANGE OF 125-250*F. AND AT A PRESSURE OF 1 TO 20 ATMOSPHERES.
Claim 2
Independent Claim
82 words
THE METHOD OF SELECTIVELY HYDROGENATING DIOLEFINS PRESENT IN MINOR QUANTITY IN A MIXED HYDROCARBON STREAM COMPOSED ESSENTIALLY OF HYDROCARBONS IN THE RANGE OF 4-5 CARBON ATOMS, SAID STREAM ALSO CONTAINING MONOOLEFINS, WHICH METHOD COMPRISES SUBJECTING SUCH MIXED STREAM WITH ADDED HYDROGEN TO CONTACT WITH ACTIVE COPPER CHROMITE CATALYST HAVING AN INITIAL SURFACE AREA OF NOT LESS THAN 50 SQUARE METERS PER GRAM, SAID CONTACT BEING EFFECTED AT TEMPERATURES IN THE RANGE OF 125-250*F. AND AT A PRESSURE OF 1 TO 20 ATMOSPHERES.
References Cited (Backward Citations)
US1889388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |