Patent US4285709A successfully refreshed from Google Patents.
Patent US2809710A successfully refreshed from Google Patents.
US2809710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the removal of acetylene from gases containing ethylene
Assignee: Phillips Petroleum Co
•
Filing: 1953-10-16
•
Granted: 1957-10-15
•
Expires: 1973-10-16
Abstract
No abstract record available.
Inventors
- 👤 Karl H Hachmuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:55
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/1487; C; C07; C07C; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN THE SEPARATION OF ACETYLENE FORM A GASEOUS MIXTURE CONTAINING THE SAME WHEREIN A A SELECTIVE SOLVENT IS EMPLOYED TO ABSORP ACETYLENE FROM SAID GASEOUS MIXTURE AND THERE IS UNAVOIDALY ABSORBED A SMALL PERCENTAGE OF THE OTHER GASES WHICH ARE LOWER BOILING THAN THE ACETYLENE, IN SAID MIXTURE, WHICH ARE STRIPPED FROM THE SOLVENT FOLLOWING THE ABSORPTION STEP BY ELEVATING THE TEMPERATURE OF THE SOLVENT CONTAINING THE ACETYLENE AND SAID GASES SUBSTANTIALLY AT THE PRESSURE AT WHICH SAID ACETYLENE AND SAID UNAVOIDABLY ABSORPTED GASES ARE ABSORPTED, THE IMPROVEMENT WHICH COMPRISES ADDING A THIRD COMPONENT WHICH IS OTHER THAN ANY OF SAID ACETYLENE, SAID GASES AND SAID SOLVENT DURING SAID TEMPERATURE ELEVATION EFFECTIVE TO REDUCE THE TEMPERATURE TO WHICH THE COMBINED MIXTURE
Claim 2
Dependent Claim
121 words
IN THE SEPARATION OF ACETYLENE FORM A GASEOUS MIXTURE CONTAINING THE SAME WHEREIN A A SELECTIVE SOLVENT IS EMPLOYED TO ABSORP ACETYLENE FROM SAID GASEOUS MIXTURE AND THERE IS UNAVOIDALY ABSORBED A SMALL PERCENTAGE OF THE OTHER GASES WHICH ARE LOWER BOILING THAN THE ACETYLENE, IN SAID MIXTURE, WHICH ARE STRIPPED FROM THE SOLVENT FOLLOWING THE ABSORPTION STEP BY ELEVATING THE TEMPERATURE OF THE SOLVENT CONTAINING THE ACETYLENE AND SAID GASES SUBSTANTIALLY AT THE PRESSURE AT WHICH SAID ACETYLENE AND SAID UNAVOIDABLY ABSORPTED GASES ARE ABSORPTED, THE IMPROVEMENT WHICH COMPRISES ADDING A THIRD COMPONENT WHICH IS OTHER THAN ANY OF SAID ACETYLENE, SAID GASES AND SAID SOLVENT DURING SAID TEMPERATURE ELEVATION EFFECTIVE TO REDUCE THE TEMPERATURE TO WHICH THE COMBINED MIXTURE
References Cited (Backward Citations)
US2405693A
Cited
US2522059A
Cited
US2587689A
Cited
US2659453A
Cited
US2661812A
Cited
US2715947A
Cited
US2670810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |