US2939834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractionation and absorption process
Assignee: Shell USA Inc
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Filing: 1957-08-26
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Granted: 1960-06-07
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Expires: 1977-08-26
Abstract
No abstract record available.
Inventors
- 👤 Harry D Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:45
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/143; C; C10; C10G; C10G7/00; C10G7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
A PROCESS FOR RECOVERING CATALYTICALLY-CRACKED GASOLINE HAVING A RELATIVELY LOW END POINT WHICH COMPRISES FRACTIONALLY DISTILLING THE PRODUCT FROM CONVENTIONAL CATALYTIC CRACKING OF HYDROCARBONS, TAKING OVERHEAD A VAPOR FRACTION COMPRISING GASOLINE BOILING RANGE AND LIGHTER HYDROCARBONS, PARTIALLY CONDENSING SAID OVERHEAD FRACTION TO PRODUCE AT LEAST ONE LIQUID PARTIAL CONDENSATE FRACTION COMPRISING GASOLINE AND SUBSTANTIALLY EXCLUDING HYDROCARBONS IN THE BOILING RANGE OF HEAVY CATALYTICALLYCRACKED NAPHTHA, PARTIALLY CONDENSING THE REMAINING VAPOR FRACTION TO PRODUCE AT LEAST A SECOND, LIGHTER LIQUID PARTIAL CONDENSATE FRACTION AND AN UNCONDENSED GAS FRACTION, COMPRESSING SAID UNCONDENSED GAS FRACTION AND COOLING THE COMPRESSED GAS TO PRODUCE AT LEAST ONE LIQUID COMPRESSOR CONDENSATE FRACTION AND A COMPRESSED GAS FRACTION, CHARGING SAID LIQUID COMPRESSOR CONDENSATE FRACTION AND SAID COMPRESSED GAS FRACTION TO THE LOWER SECTION OF A RECTIFIED ABSORBER, CHARGING AT LEAST PART OF SAID FIRST-MENTIONED PARTIAL CONDENSATE FRACTION TO THE UPPER SECTION OF SAID ABSORBER AS LEAN OIL, CAUSING GAS TO FLOW UPWARDLY IN SAID ABSORBER IN COUNTERCURRENT CONTACT WITH SAID LEAN OIL AND WITHDRAWING FROM SAID ABSORBER AS OVERHEAD A LEAN RESIDUE GAS AND AS BOTTOMS UNSTABLE CATALYTICALLY-CRACKED GASOLINE.
Claim 2
Dependent Claim
181 words
A PROCESS FOR RECOVERING CATALYTICALLY-CRACKED GASOLINE HAVING A RELATIVELY LOW END POINT WHICH COMPRISES FRACTIONALLY DISTILLING THE PRODUCT FROM CONVENTIONAL CATALYTIC CRACKING OF HYDROCARBONS, TAKING OVERHEAD A VAPOR FRACTION COMPRISING GASOLINE BOILING RANGE AND LIGHTER HYDROCARBONS, PARTIALLY CONDENSING SAID OVERHEAD FRACTION TO PRODUCE AT LEAST ONE LIQUID PARTIAL CONDENSATE FRACTION COMPRISING GASOLINE AND SUBSTANTIALLY EXCLUDING HYDROCARBONS IN THE BOILING RANGE OF HEAVY CATALYTICALLYCRACKED NAPHTHA, PARTIALLY CONDENSING THE REMAINING VAPOR FRACTION TO PRODUCE AT LEAST A SECOND, LIGHTER LIQUID PARTIAL CONDENSATE FRACTION AND AN UNCONDENSED GAS FRACTION, COMPRESSING SAID UNCONDENSED GAS FRACTION AND COOLING THE COMPRESSED GAS TO PRODUCE AT LEAST ONE LIQUID COMPRESSOR CONDENSATE FRACTION AND A COMPRESSED GAS FRACTION, CHARGING SAID LIQUID COMPRESSOR CONDENSATE FRACTION AND SAID COMPRESSED GAS FRACTION TO THE LOWER SECTION OF A RECTIFIED ABSORBER, CHARGING AT LEAST PART OF SAID FIRST-MENTIONED PARTIAL CONDENSATE FRACTION TO THE UPPER SECTION OF SAID ABSORBER AS LEAN OIL, CAUSING GAS TO FLOW UPWARDLY IN SAID ABSORBER IN COUNTERCURRENT CONTACT WITH SAID LEAN OIL AND WITHDRAWING FROM SAID ABSORBER AS OVERHEAD A LEAN RESIDUE GAS AND AS BOTTOMS UNSTABLE CATALYTICALLY-CRACKED GASOLINE.
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) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |