Patent US2917563A successfully refreshed from Google Patents.
US2917563A
Expired / Lapsed
US
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Separation of alkynes from olefins
Assignee: Phillips Petroleum Co
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Filing: 1957-05-01
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Granted: 1959-12-15
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Expires: 1977-05-01
Abstract
No abstract record available.
Inventors
- 👤 Robert F Dye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:12
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/11; Y; Y10; Y10S; Y10S585/00; Y10S585/909; Y10S585/911; Y10S585/914
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A METHOD FOR REMOVING AN ALKYNE FROM A HYDROCARBON MIXTURE COMPRISING AN OLEFIN AND AN ALKYNE HAVING SIMILAR BOILING POINTS IN WHICH THE HYDROCARBON MIXTURE IS CONTACTED IN A CONTACTING ZONE WITH A SOLVENT WHICH COMPRISES EXPANDING AND VAPORIZING SAID MIXTURE IN INDIRECT HEAT EXCHANGE WITH DIMETHYLFORMAMIDE SOLVENT WHEREBY SAID SOLVENT IS REDUCED IN TEMPERATURE TO THE TEMPERATURE OF THE CONTACTING ZONE, SAID HYDROCARBON MIXTURE AND SAID SOLVENT BEING SUBSTANTIALLY AT THE SAME TEMPERATURE PRIOR TO SAID HEAT EXCHANGE HEATING THE VAPORIZED HYDROCARBON MIXTURE TO RAISE THE VAPORS TO THE TEMPERATURE IN THE CONTACTING ZONE, CONTACTING THE HYDROCARBON VAPORS WITH SAID SOLVENT IN SAID CONTACTING ZONE WHEREBY THE ALKYNE IS SELECTIVELY ABSORBED IN SAID SOLVENT AND RECOVERING SAID HYDROCARBON MIXTURE ESSENTIALLY FREE OF ALKYNE.
Claim 2
Independent Claim
124 words
A METHOD FOR REMOVING AN ALKYNE FROM A HYDROCARBON MIXTURE COMPRISING AN OLEFIN AND AN ALKYNE HAVING SIMILAR BOILING POINTS IN WHICH THE HYDROCARBON MIXTURE IS CONTACTED IN A CONTACTING ZONE WITH A SOLVENT WHICH COMPRISES EXPANDING AND VAPORIZING SAID MIXTURE IN INDIRECT HEAT EXCHANGE WITH DIMETHYLFORMAMIDE SOLVENT WHEREBY SAID SOLVENT IS REDUCED IN TEMPERATURE TO THE TEMPERATURE OF THE CONTACTING ZONE, SAID HYDROCARBON MIXTURE AND SAID SOLVENT BEING SUBSTANTIALLY AT THE SAME TEMPERATURE PRIOR TO SAID HEAT EXCHANGE HEATING THE VAPORIZED HYDROCARBON MIXTURE TO RAISE THE VAPORS TO THE TEMPERATURE IN THE CONTACTING ZONE, CONTACTING THE HYDROCARBON VAPORS WITH SAID SOLVENT IN SAID CONTACTING ZONE WHEREBY THE ALKYNE IS SELECTIVELY ABSORBED IN SAID SOLVENT AND RECOVERING SAID HYDROCARBON MIXTURE ESSENTIALLY FREE OF ALKYNE.
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) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |