US3308180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective hydrogenation
Assignee: CATALYSTS and CHEM Inc
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Filing: 1964-04-27
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Granted: 1967-03-07
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Expires: 1984-04-27
Abstract
No abstract record available.
Inventors
- 👤 Harold W Fleming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:27
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/163; C07C7/167
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN THE PROCESS FOR SEPARATING ACETYLENE FROM A GAS STREAM CONTAINING BOTH ACETYLENE AND ETHYLENE BY SELECTIVE HYDROGENATION WHEREIN AT A GIVEN SPACE VELOCITY IN THE RANGE OF 500 TO 7000 VOLUMES OF GAS PER VOLUME OF CATALYST PER HOUR AND USING A CATALYST CONTAINING 0.01 TO 0.1 WEIGHT PERCENT PALLADIUM SUPPORTED ON ALUMINA, AND WHEREIN A NARROW HYDROGENATION TEMPERATURE RANGE $T MUST BE MAINTAINED IN THE REGION OF 100*F.$$T$$400*F. FOR MAXIMUM SELECTIVITY, THE STEP OF BROADENING THE $T RANGE CONSISTING ESSENTIALLY OF MAINTAINING CARBON MONOXIDE IN SAID GAS STREAM IN AN AMOUNT OF 5 TO 400 PARTS PER MILLION BASED ON THE GAS STREAM DURING THE HYDROGENATION.
Claim 2
Dependent Claim
108 words
IN THE PROCESS FOR SEPARATING ACETYLENE FROM A GAS STREAM CONTAINING BOTH ACETYLENE AND ETHYLENE BY SELECTIVE HYDROGENATION WHEREIN AT A GIVEN SPACE VELOCITY IN THE RANGE OF 500 TO 7000 VOLUMES OF GAS PER VOLUME OF CATALYST PER HOUR AND USING A CATALYST CONTAINING 0.01 TO 0.1 WEIGHT PERCENT PALLADIUM SUPPORTED ON ALUMINA, AND WHEREIN A NARROW HYDROGENATION TEMPERATURE RANGE $T MUST BE MAINTAINED IN THE REGION OF 100*F.$$T$$400*F. FOR MAXIMUM SELECTIVITY, THE STEP OF BROADENING THE $T RANGE CONSISTING ESSENTIALLY OF MAINTAINING CARBON MONOXIDE IN SAID GAS STREAM IN AN AMOUNT OF 5 TO 400 PARTS PER MILLION BASED ON THE GAS STREAM DURING THE HYDROGENATION.
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |