US2509136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for concentrating dilute solutions
Assignee: Gulf Oil Corp
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Filing: 1949-06-17
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Granted: 1950-05-23
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Expires: 1969-06-17
Abstract
No abstract record available.
Inventors
- 👤 Paul W Cornell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:50
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/28; B01D1/289; B01D1/284; B01D1/2856
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A PROCESS OF RECOVERING VOLATILE ORGANIC COMPOUNDS FROM DILUTE SOLUTION IN A SOLVENT HAVING A BOILING POINT ABOVE THE BOILING POINTS OF SAID COMPOUNDS WHICH COMPRISES FRACTIONATING SAID DILUTE SOLUTION IN A FIRST FRACTIONATION ZONE INTO A VAPOR OVERHEAD FRACTION CONTAINING SOLVENT AND RICH IN SAID VOLATILE ORGANIC COMPOUNDS AND A BOTTOMS FRACTION CONSISTING ESSENTIALLY OF SAID SOLVENT, COMPRESSING SAID VAPOR OVERHEAD FRACTION, PASSING THE RESULTING COMPRESSED VAPORS INTO INDIRECT HEAT EXCHANGE RELATIONSHIP WITH SOLUTION OF SAID FIRST FRACTIONATION ZONE UNDER CONDITIONS TO SUPPLY HEAT OF VAPORIZATION OF SAID COMPRESSED VAPORS TO SAID LAST-MENTIONED SOLUTION AND TO CONDENSE SAID COMPRESSED VAPORS TO THE LIQUID PHASE, FRACTIONATING THE RESULTING LIQUID PHASE MATERIAL IN A SECOND FRACTIONATION ZONE INTO AN OVERHEAD FRACTION CONSISTING PRINCIPALLY OF SAID VOLATILE ORGANIC COMPOUNDS AND A BOTTOMS FRACTION CONSISTING ESSENTIALLY OF SAID SOLVENT, AND VARYING THE EXTENT OF COMPRESSION OF THE VAPOR OVERHEAD FRACTION FROM SAID FIRST FRACTIONATION ZONE IN ACCORDANCE WITH CHANGES IN THE COMPOSITION OF LIQUID PHASE MATERIAL EXISTING AT AN INTERMEDIATE POINT IN SAID SECOND FRACTIONATION ZONE.
Claim 2
Dependent Claim
173 words
A PROCESS OF RECOVERING VOLATILE ORGANIC COMPOUNDS FROM DILUTE SOLUTION IN A SOLVENT HAVING A BOILING POINT ABOVE THE BOILING POINTS OF SAID COMPOUNDS WHICH COMPRISES FRACTIONATING SAID DILUTE SOLUTION IN A FIRST FRACTIONATION ZONE INTO A VAPOR OVERHEAD FRACTION CONTAINING SOLVENT AND RICH IN SAID VOLATILE ORGANIC COMPOUNDS AND A BOTTOMS FRACTION CONSISTING ESSENTIALLY OF SAID SOLVENT, COMPRESSING SAID VAPOR OVERHEAD FRACTION, PASSING THE RESULTING COMPRESSED VAPORS INTO INDIRECT HEAT EXCHANGE RELATIONSHIP WITH SOLUTION OF SAID FIRST FRACTIONATION ZONE UNDER CONDITIONS TO SUPPLY HEAT OF VAPORIZATION OF SAID COMPRESSED VAPORS TO SAID LAST-MENTIONED SOLUTION AND TO CONDENSE SAID COMPRESSED VAPORS TO THE LIQUID PHASE, FRACTIONATING THE RESULTING LIQUID PHASE MATERIAL IN A SECOND FRACTIONATION ZONE INTO AN OVERHEAD FRACTION CONSISTING PRINCIPALLY OF SAID VOLATILE ORGANIC COMPOUNDS AND A BOTTOMS FRACTION CONSISTING ESSENTIALLY OF SAID SOLVENT, AND VARYING THE EXTENT OF COMPRESSION OF THE VAPOR OVERHEAD FRACTION FROM SAID FIRST FRACTIONATION ZONE IN ACCORDANCE WITH CHANGES IN THE COMPOSITION OF LIQUID PHASE MATERIAL EXISTING AT AN INTERMEDIATE POINT IN SAID SECOND FRACTIONATION 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) | 1953-05-22 | 1953-11-21 | 1954-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-22 | 1957-11-21 | 1958-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-22 | 1961-11-21 | 1962-05-23 | $7700.00 | Window Closed / Lapsed |