US3004629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removing acetylene from ethylene
Assignee: Phillips Petroleum Co
•
Filing: 1959-09-25
•
Granted: 1961-10-17
•
Expires: 1979-09-25
Abstract
No abstract record available.
Inventors
- 👤 John E Cottle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:56
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A METHOD FOR THE PURIFICATION OF AN ETHYLENE STREAM ALSO CONTAINING ACETYLENE WHICH COMPRISES CONTACTING SAID STREAM WITH A STREAM OF DRY DIMETHYLFORMAMIDE, FLOWING THE STREAMS COUNTERCURRENTLY TO EACH OTHER, INTRODUCING WATER TO THE THUS CONTACTED STREAMS AFTER SUBSTANTIAL CONTACT OF THEM HAS BEEN OBTAINED SO AS TO RELEAST ETHYLENE FROM THE SOLVENT PHASE, THUS REMOVING FROM THE CONTACTING OPERATION A SOLVENT ENRICHED WITH ACETYLENE AND AN ESSENTIALLY DRY EHTYLENE GAS SUBSTANTIALLY FREE FROM ACETYLENE, THE QUANTITY OF WATER INTRODUCED BEING SUFFICIENT TO REDUCE THE SOLUBILITY OF ETHYLENE IN THE DIMETHYLFORMAMIDE SOLVENT BUT INSUFFICIENT TO CAUSE WATER VAPOR TO BE PRESENT IN THE PURIFIED ETHYLENE STREAM.
Claim 2
Independent Claim
106 words
A METHOD FOR THE PURIFICATION OF AN ETHYLENE STREAM ALSO CONTAINING ACETYLENE WHICH COMPRISES CONTACTING SAID STREAM WITH A STREAM OF DRY DIMETHYLFORMAMIDE, FLOWING THE STREAMS COUNTERCURRENTLY TO EACH OTHER, INTRODUCING WATER TO THE THUS CONTACTED STREAMS AFTER SUBSTANTIAL CONTACT OF THEM HAS BEEN OBTAINED SO AS TO RELEAST ETHYLENE FROM THE SOLVENT PHASE, THUS REMOVING FROM THE CONTACTING OPERATION A SOLVENT ENRICHED WITH ACETYLENE AND AN ESSENTIALLY DRY EHTYLENE GAS SUBSTANTIALLY FREE FROM ACETYLENE, THE QUANTITY OF WATER INTRODUCED BEING SUFFICIENT TO REDUCE THE SOLUBILITY OF ETHYLENE IN THE DIMETHYLFORMAMIDE SOLVENT BUT INSUFFICIENT TO CAUSE WATER VAPOR TO BE PRESENT IN THE PURIFIED ETHYLENE 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) | 1964-10-16 | 1965-04-17 | 1965-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-16 | 1969-04-17 | 1969-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-16 | 1973-04-17 | 1973-10-17 | $7700.00 | Window Closed / Lapsed |