US3113983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective hydrogenation of diolefins
Assignee: Air Products and Chemicals Inc
•
Filing: 1959-04-07
•
Granted: 1963-12-10
•
Expires: 1979-04-07
Abstract
No abstract record available.
Inventors
- 👤 Kirsch Francis William
- 👤 Samuel E Shull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:32
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/02; C07C5/03; C07C2523/00; C07C2523/70; C07C2523/76; C07C2523/84; C07C2523/85; C07C2523/88; C07C2523/882
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
THE METHOD OF SELECTIVELY HYDROGENATING DIOLEFINS PRESENT IN MINOR QUANTITY IN A MIXED HYDROCARBON STREAM BOILING CHIEFLY IN THE C4 TO C5 RANGE AND ALSO CONTAINING MONOOLEFINS IN AN AMOUNT OF AT LEAST 5 TIMES THAT OF THE DIOLEFINS, WHICH METHOD COMPRISES PASSING SAID MIXED HYDROCARBON STREAM TOGETHER WITH HYDROGEN THROUGH A REACTION ZONE CONTAINING SULFIDED COBALT MOLYBDATE CATALYST, AT A TEMPERATURE IN THE RANGE OF 200-700*F., WHILE MAINTAINING IN SAID REACTION ZONE A PARTIAL PRESSURE OF HYDROGEN SULFIDE AT LEAST SUFFICIENT TO MAINTAIN THE CATALYST IN SULFIDED STAE AND NOT IN EXCESS OF 1% BY WEIGHT OF UNSATURATED HYDROCARBONS IN THE MIXED HYDROCARBON STREAM.
Claim 2
Independent Claim
105 words
THE METHOD OF SELECTIVELY HYDROGENATING DIOLEFINS PRESENT IN MINOR QUANTITY IN A MIXED HYDROCARBON STREAM BOILING CHIEFLY IN THE C4 TO C5 RANGE AND ALSO CONTAINING MONOOLEFINS IN AN AMOUNT OF AT LEAST 5 TIMES THAT OF THE DIOLEFINS, WHICH METHOD COMPRISES PASSING SAID MIXED HYDROCARBON STREAM TOGETHER WITH HYDROGEN THROUGH A REACTION ZONE CONTAINING SULFIDED COBALT MOLYBDATE CATALYST, AT A TEMPERATURE IN THE RANGE OF 200-700*F., WHILE MAINTAINING IN SAID REACTION ZONE A PARTIAL PRESSURE OF HYDROGEN SULFIDE AT LEAST SUFFICIENT TO MAINTAIN THE CATALYST IN SULFIDED STAE AND NOT IN EXCESS OF 1% BY WEIGHT OF UNSATURATED HYDROCARBONS IN THE MIXED HYDROCARBON STREAM.
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) | 1966-12-09 | 1967-06-10 | 1967-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-09 | 1971-06-10 | 1971-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-09 | 1975-06-10 | 1975-12-10 | $7700.00 | Window Closed / Lapsed |