US2745889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of c2, c3 and c4 alkenes from highly cracked distillates
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1953-06-22
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Granted: 1956-05-15
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Expires: 1973-06-22
Abstract
No abstract record available.
Inventors
- 👤 Robert H Johnston
- 👤 George E Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:07
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
THE PROCESS OF SEPARATING A NARROW ETHENE-RICH FRACTION FROM HIGH-TEMPERATURE CRACKED LIGHT HYDROCARBON GASEOUS PRODUCTS STRIPPED FROM HIGHER-BOILING PRODUCTS IN A PRIMARY FRACTIONATOR AND SEPARATED FROM OVERHEAD DISTILLATE THEREOF, WHICH COMPRISES PASSING A STREAM OF SAID GASEOUS PRODUCTS FIRST THROUGH AN ABSORPTION ZONE WHERE SAID STREAM IS CONTACTED WITH A C5+ HYDROCARBON FRACTION TO REMOVE MOST OF THE C3 AND HIGHER COMPONENTS, SAID C5+ HYDROCARBON FRACTION BEING PASSED INTO SAID ABSORPTION ZONE AFTER BEING STRIPPED FREE OF C3 AND C4 COMPONENTS, THEN PASSING THE REMAINING ETHENE-RICH STREAM INTO CONTACT WITH A LIGHT GAS OIL FROM THE PRIMARY FRACTIONATOR TO REMOVE SUBSTANTIALLY ALL REMAINING C5 DIENE AND HIGHER COMPONENTS BY ABSORPTION IN SAID OIL,
Claim 2
Dependent Claim
113 words
THE PROCESS OF SEPARATING A NARROW ETHENE-RICH FRACTION FROM HIGH-TEMPERATURE CRACKED LIGHT HYDROCARBON GASEOUS PRODUCTS STRIPPED FROM HIGHER-BOILING PRODUCTS IN A PRIMARY FRACTIONATOR AND SEPARATED FROM OVERHEAD DISTILLATE THEREOF, WHICH COMPRISES PASSING A STREAM OF SAID GASEOUS PRODUCTS FIRST THROUGH AN ABSORPTION ZONE WHERE SAID STREAM IS CONTACTED WITH A C5+ HYDROCARBON FRACTION TO REMOVE MOST OF THE C3 AND HIGHER COMPONENTS, SAID C5+ HYDROCARBON FRACTION BEING PASSED INTO SAID ABSORPTION ZONE AFTER BEING STRIPPED FREE OF C3 AND C4 COMPONENTS, THEN PASSING THE REMAINING ETHENE-RICH STREAM INTO CONTACT WITH A LIGHT GAS OIL FROM THE PRIMARY FRACTIONATOR TO REMOVE SUBSTANTIALLY ALL REMAINING C5 DIENE AND HIGHER COMPONENTS BY ABSORPTION IN SAID OIL,
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) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |