Patent US3293869A successfully refreshed from Google Patents.
US3293869A
Expired / Lapsed
US
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Gas liquefaction with recombining of separated gas-liquid fractions
Assignee: Phillips Petroleum Co
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Filing: 1964-02-10
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Granted: 1966-12-27
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Expires: 1984-02-10
Abstract
No abstract record available.
Inventors
- 👤 Joseph T Karbosky
- 👤 Ernest A Harper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:59
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/028; F25J3/029; F25J3/0204; F25J3/0209; F25J3/0233; F25J3/0242; F25J3/0257; F25J3/06; F25J3/0605; F25J3/061; F25J3/063; F25J3/0635; F25J3/0645; F25J3/066; F25J3/0685; F25J3/069; F25J2205/00; F25J2205/02; F25J2205/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
324 words
IN A PROCESS WHICH COMPRISES PASSING A FEED GAS STREAM TO A FIRST INDIRECT HEAT EXCHANGE ZONE TO PARTIALLY LIQUEFY SAID FEED GAS STREAM IN SAID FIRST INDIRECT HEAT EXCHANGE ZONE, PASSING THE RESULTING VAPOR-LIQUID MIXTURE FROM SAID FIRST INDIRECT HEAT EXCHANGE ZONE TO A FIRST SEPARATION ZONE, PASSING A FIRST VAPOROUS STREAM FROM SAID FIRST SEPARATION ZONE TO A SECOND INDIRECT HEAT EXCHANGE ZONE TO PARTIALLY LIQUEFY SAID FIRST VAPOROUS STREAM, PASSING THE RESULTING VAPOR-LIQUID MIXTURE FROM SAID SECOND INDIRECT HEAT EXCHANGE ZONE TO A SECOND SEPARATION ZONE, WITHDRAWING A SECOND VAPOROUS STREAM FROM SAID SECOND SEPARATION ZONE, PASSING A LIQUID FROM SAID SECOND SEPARATION ZONE TO A FIRST VAPORIZATION ZONE, WITHDRAWING A VAPOR FROM SAID FIRST VAPORIZATION ZONE, WITHDRAWING A LIQUID FROM SAID FIRST VAPORIZATION ZONE, PASSING SAID VAPOR AND LIQUID WITHDRAWN FROM SAID FIRST VAPORIZATION ZONE IN ADMIXTURE THROUGH SAID SECOND INDIRECT HEAT EXCHANGE ZONE IN INDIRECT HEAT EXCHANGE WITH SAID FIRST VAPOROUS STREAM PASSED FROM SAID FIRST SEPARATION ZONE TO SAID SECOND SEPARATION ZONE, VAPORIZING IN SAID SECOND INDIRECT HEAT EXCHANGE ZONE SAID LIQUID CONTAINED IN SAID VAPOR-LIQUID MIXTURE PASSED TO SAID SECOND INDIRECT HEAT EXCHANGE ZONE FROM SAID FIRST VAPORIZATION ZONE, PASSING A PORTION OF THE RESULTANT VAPOR FROM SAID SECOND INDIRECT HEAT EXCHANGE ZONE THROUGH SAID FIRST INDIRECT HEAT EXCHANGE ZONE IN DIRECT HEAT EXCHANGE WITH SAID FEED GAS STREAM, PASSING A LIQUID FROM SAID FIRST SEPARATION ZONE TO A SECOND VAPORIZATION ZONE, WITHDRAWING A VAPOR FROM SAID SECOND VAPORIZATION ZONE, WITHDRAWING A LIQUID FROM SAID SECOND VAPORIZATION ZONE, COMBINING SAID VAPOR AND LIQUID WITHDRAWN FROM SAID SECOND VAPORIZATION ZONE PASSING SAID COMBINED LIQUID-VAPOR MIXTURE WITHDRAWN FROM SAID SECOND VAPORIZATION ZONE IN ADMIXTURE WITH THE REMAINDER OF SAID RESULTANT VAPOR THROUGH SAID FIRST INDIRECT HEAT EXCHANGE ZONE IN INDIRECT HEAT EXCHANGE WITH SAID FEED GAS STREAM, AND VAPORIZING WITHIN SAID FIRST INDIRECT HEAT EXCHANGE ZONE AT LEAST A PORTION OF SAID LIQUID WITHDRAWN FROM SAID SECOND VAPORIZATION ZONE.
Claim 2
Dependent Claim
324 words
IN A PROCESS WHICH COMPRISES PASSING A FEED GAS STREAM TO A FIRST INDIRECT HEAT EXCHANGE ZONE TO PARTIALLY LIQUEFY SAID FEED GAS STREAM IN SAID FIRST INDIRECT HEAT EXCHANGE ZONE, PASSING THE RESULTING VAPOR-LIQUID MIXTURE FROM SAID FIRST INDIRECT HEAT EXCHANGE ZONE TO A FIRST SEPARATION ZONE, PASSING A FIRST VAPOROUS STREAM FROM SAID FIRST SEPARATION ZONE TO A SECOND INDIRECT HEAT EXCHANGE ZONE TO PARTIALLY LIQUEFY SAID FIRST VAPOROUS STREAM, PASSING THE RESULTING VAPOR-LIQUID MIXTURE FROM SAID SECOND INDIRECT HEAT EXCHANGE ZONE TO A SECOND SEPARATION ZONE, WITHDRAWING A SECOND VAPOROUS STREAM FROM SAID SECOND SEPARATION ZONE, PASSING A LIQUID FROM SAID SECOND SEPARATION ZONE TO A FIRST VAPORIZATION ZONE, WITHDRAWING A VAPOR FROM SAID FIRST VAPORIZATION ZONE, WITHDRAWING A LIQUID FROM SAID FIRST VAPORIZATION ZONE, PASSING SAID VAPOR AND LIQUID WITHDRAWN FROM SAID FIRST VAPORIZATION ZONE IN ADMIXTURE THROUGH SAID SECOND INDIRECT HEAT EXCHANGE ZONE IN INDIRECT HEAT EXCHANGE WITH SAID FIRST VAPOROUS STREAM PASSED FROM SAID FIRST SEPARATION ZONE TO SAID SECOND SEPARATION ZONE, VAPORIZING IN SAID SECOND INDIRECT HEAT EXCHANGE ZONE SAID LIQUID CONTAINED IN SAID VAPOR-LIQUID MIXTURE PASSED TO SAID SECOND INDIRECT HEAT EXCHANGE ZONE FROM SAID FIRST VAPORIZATION ZONE, PASSING A PORTION OF THE RESULTANT VAPOR FROM SAID SECOND INDIRECT HEAT EXCHANGE ZONE THROUGH SAID FIRST INDIRECT HEAT EXCHANGE ZONE IN DIRECT HEAT EXCHANGE WITH SAID FEED GAS STREAM, PASSING A LIQUID FROM SAID FIRST SEPARATION ZONE TO A SECOND VAPORIZATION ZONE, WITHDRAWING A VAPOR FROM SAID SECOND VAPORIZATION ZONE, WITHDRAWING A LIQUID FROM SAID SECOND VAPORIZATION ZONE, COMBINING SAID VAPOR AND LIQUID WITHDRAWN FROM SAID SECOND VAPORIZATION ZONE PASSING SAID COMBINED LIQUID-VAPOR MIXTURE WITHDRAWN FROM SAID SECOND VAPORIZATION ZONE IN ADMIXTURE WITH THE REMAINDER OF SAID RESULTANT VAPOR THROUGH SAID FIRST INDIRECT HEAT EXCHANGE ZONE IN INDIRECT HEAT EXCHANGE WITH SAID FEED GAS STREAM, AND VAPORIZING WITHIN SAID FIRST INDIRECT HEAT EXCHANGE ZONE AT LEAST A PORTION OF SAID LIQUID WITHDRAWN FROM SAID SECOND VAPORIZATION ZONE.
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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |