Patent US2645104A successfully refreshed from Google Patents.
US2645104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractional distillation
Assignee: Lummus Technology LLC
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Filing: 1951-02-17
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Granted: 1953-07-14
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Expires: 1971-02-17
Abstract
No abstract record available.
Inventors
- 👤 Kniel Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:48
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
THE METHOD OF RECOVERING THE SEPARATE COMPONENTS OF A HYDROCARBON GAS MIXTURE CONTAINING ETHANE, ETHYLENE, PROPANE AND PROPYLENE WHICH COMPRISES FRACTIONALLY DISTILLING THE ETHYLENE AND ETHANE AS OVERHEAD FROM SAID PROPANE AND PROPYLENE AS BOTTOMS IN A DEETHANIZER TOWER, FRACTIONALLY DISTILLING THE ETHYLENE FROM THE ETHANE IN AN ETHYLENE TOWER, FRACTIONALLY DISTILLING A GASEOUS PROPYLENE OVERHEAD FROM A PROPANE BOTTOMS IN A PROPYLENE TOWER, COMPRESSING THE PROPYLENE OVERHEAD, REBOILING SAID PROPYLENE TOWER WITH A FIRST PART OF THE COMPRESSED PROPYLENE, REBOILING SAID ETHYLENE TOWER WITH A SECOND PART OF THE COMPESSED PROPYLENE, CONDENSING A PART OF THE COMPRESSED PROPYLENE, EXPANDING A PORTION OF SAID CONDENSED PROPYLENE, INDIRECTLY CONDENSING SAID DEETHANIZER TOWER OVERHEAD AND SAID ETHYLENE TOWER OVERHEAD WITH SAID EXPANDED PORTION OF PROPYLENE DIRECTLY INTRODUCING A FURTHER PORTION OF PROPYLENE CONDENSATE, INTO SAID PROPYLENE TOWER AS REFLUX, WITHDRAWING A PORTION OF PROPYLENE AS NET PROPYLENE PRODUCT AND REMOVING THE ETHYLENE PRODUCT AS THE OVERHEAD FROM THE ETHYLENE TOWER.
Claim 2
Independent Claim
158 words
THE METHOD OF RECOVERING THE SEPARATE COMPONENTS OF A HYDROCARBON GAS MIXTURE CONTAINING ETHANE, ETHYLENE, PROPANE AND PROPYLENE WHICH COMPRISES FRACTIONALLY DISTILLING THE ETHYLENE AND ETHANE AS OVERHEAD FROM SAID PROPANE AND PROPYLENE AS BOTTOMS IN A DEETHANIZER TOWER, FRACTIONALLY DISTILLING THE ETHYLENE FROM THE ETHANE IN AN ETHYLENE TOWER, FRACTIONALLY DISTILLING A GASEOUS PROPYLENE OVERHEAD FROM A PROPANE BOTTOMS IN A PROPYLENE TOWER, COMPRESSING THE PROPYLENE OVERHEAD, REBOILING SAID PROPYLENE TOWER WITH A FIRST PART OF THE COMPRESSED PROPYLENE, REBOILING SAID ETHYLENE TOWER WITH A SECOND PART OF THE COMPESSED PROPYLENE, CONDENSING A PART OF THE COMPRESSED PROPYLENE, EXPANDING A PORTION OF SAID CONDENSED PROPYLENE, INDIRECTLY CONDENSING SAID DEETHANIZER TOWER OVERHEAD AND SAID ETHYLENE TOWER OVERHEAD WITH SAID EXPANDED PORTION OF PROPYLENE DIRECTLY INTRODUCING A FURTHER PORTION OF PROPYLENE CONDENSATE, INTO SAID PROPYLENE TOWER AS REFLUX, WITHDRAWING A PORTION OF PROPYLENE AS NET PROPYLENE PRODUCT AND REMOVING THE ETHYLENE PRODUCT AS THE OVERHEAD FROM THE ETHYLENE TOWER.
References Cited (Backward Citations)
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US2355589A
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US2409459A
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US2482304A
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US2500353A
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US2564200A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |