Patent US2798031A successfully refreshed from Google Patents.
US2798031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for controlling steam distillation of petroleum
Assignee: Gulf Oil Corp
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Filing: 1954-04-29
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Granted: 1957-07-02
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Expires: 1974-04-29
Abstract
No abstract record available.
Inventors
- 👤 Robert L Irvine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:09
CPC Classifications
C; C10; C10G; C10G7/00; C10G7/12; B; B01; B01D; B01D3/00; B01D3/42; B01D3/4211; B01D3/4261
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
219 words
IN THE STEAM STRIPPING OF A PETROLEUM OIL STREAM FROM A FRACTIONATING COLUMN WHEREIN THE OIL IS INTRODUCED INTO THE STRIPPING COLUMN AT ABOUT THE TEMPERATURE AT WHICH IS A WITHDRAWN FROM THE FRACTIONATING COLUMN, OPEN STEAM BEING INTRODUCED AT THE LOWER END OF THE COLUMN PRIMARILY TO REDUCE THE PARTIAL VAPOR PRESSURE OF THE LIGHT ENDS OF THE OIL, AND IN WHICH, EXCEPT FOR A MINOR AMOUNT OF HEAT TRANSFER AT A SUBSTANTIALLY CONSTANT RATE THROUGH THE WALLS OF THE COLUMN, HEAT IS PUT INTO COLUMN ONLY BY THE OIL FEED AND THE STEAM, AND HEAT IS TAKEN OUT OF THE COLUMN ONLY BY THE VAPOR WITHDRAWN OVERHEAD FROM THE COLUMN AND BY THE STRIPPED LIQUID WITHDRAWN FROM THE BOTTOM OF THE COLUMN, THE IMPROVEMENT WHICH COMPRISES MEASURING THE DIFFERENCE BETWEEN THE TEMPERATURE OF THE STREAM OF PETROLEUM OIL BEING FED TO THE STRIPPING COLUMN AND THE TEMPERATURE OF THE STREAM OF STRIPPED OIL BEING WITHDRAWN FROM THE BOTTOM OF THE STRIPPING COLUMN AND MAINTAINING SAID TEMPERATURE DIFFERENCE SUBSTANTIALLY CONSTANT BY REGULATING THE FLOW RATE AT WHICH STEAM IS INTRODUCED TO THE STRIPPING COLUMN IN RESPONSE TO CHANGES IN SAID TEMPERATURE DIFFERENCE, THE FLOW RATE OF STEAM BEING INCREASED AS SAID TEMPERATURE DIFFERENCE DECREASES AND BEING DECREASED AS SAID TEMPERATURE DIFFERENCE INCREASES. AM OF PETROLEUM OIL BEING FED
Claim 2
Dependent Claim
219 words
IN THE STEAM STRIPPING OF A PETROLEUM OIL STREAM FROM A FRACTIONATING COLUMN WHEREIN THE OIL IS INTRODUCED INTO THE STRIPPING COLUMN AT ABOUT THE TEMPERATURE AT WHICH IS A WITHDRAWN FROM THE FRACTIONATING COLUMN, OPEN STEAM BEING INTRODUCED AT THE LOWER END OF THE COLUMN PRIMARILY TO REDUCE THE PARTIAL VAPOR PRESSURE OF THE LIGHT ENDS OF THE OIL, AND IN WHICH, EXCEPT FOR A MINOR AMOUNT OF HEAT TRANSFER AT A SUBSTANTIALLY CONSTANT RATE THROUGH THE WALLS OF THE COLUMN, HEAT IS PUT INTO COLUMN ONLY BY THE OIL FEED AND THE STEAM, AND HEAT IS TAKEN OUT OF THE COLUMN ONLY BY THE VAPOR WITHDRAWN OVERHEAD FROM THE COLUMN AND BY THE STRIPPED LIQUID WITHDRAWN FROM THE BOTTOM OF THE COLUMN, THE IMPROVEMENT WHICH COMPRISES MEASURING THE DIFFERENCE BETWEEN THE TEMPERATURE OF THE STREAM OF PETROLEUM OIL BEING FED TO THE STRIPPING COLUMN AND THE TEMPERATURE OF THE STREAM OF STRIPPED OIL BEING WITHDRAWN FROM THE BOTTOM OF THE STRIPPING COLUMN AND MAINTAINING SAID TEMPERATURE DIFFERENCE SUBSTANTIALLY CONSTANT BY REGULATING THE FLOW RATE AT WHICH STEAM IS INTRODUCED TO THE STRIPPING COLUMN IN RESPONSE TO CHANGES IN SAID TEMPERATURE DIFFERENCE, THE FLOW RATE OF STEAM BEING INCREASED AS SAID TEMPERATURE DIFFERENCE DECREASES AND BEING DECREASED AS SAID TEMPERATURE DIFFERENCE INCREASES. AM OF PETROLEUM OIL BEING FED
Claim 3
Dependent Claim
159 words
APPARATUS FOR STEAM STRIPPING A PETROLEUM OIL STREAM WITHDRAWN FROM A FRACTIONATING COLUMN WHICH COMPRISES A STRIPPING COLUMN HAVING VAPOR-LIQUID CONTACTING MEAN THEREIN, A FEED LINE AT THE UPPER END OF SAID STRIPPING COLUMN FROM INTRODUCING SAID PETROLEUM OIL STREAM FROM SAID FRACTIONATING COLUMN, AN OVERHEAD LINE AT THE UPPER END OF SAID STRIPPING COLUMN FOR RETURNING STRIPPED VAPOR TO SAID FRACTIONATING COLUMN, A BOTTOM LIQUID LINE AT THE LOWER END OF SAID STRIPPING COLUMN, TEMPERATURE-SENSITIVE MEANS IN SAID FEED LINE AND TEMPERATURE-SENSITIVE MEANS IN SAID BOTTOMS LIQUID LINE, A LINE FOR INTRODUCING STEAM TO SAID STRIPPING COLUMN, A FFLOW CONTROL VALVE INH SAID STEAM LINE, AND A DIFFERENTIAL TEMPERATURE CONTROLLER CONNECTED WITH SAID TEMPERATURE-SENSITIVE MEANS FORRE DIFMEASURING THE TEMPERATURE DIFFERENTIAL BETWEEN THE FEED LINE AND THE BOTTOMS LIQUID LINE, SAID DIFFERENTIAL TEMPERATURE CONTROLLER BEING ALSO OPERATIVELY CONNECTED WITH THE FLOW CONTROL VALVE IN THE STEAM LINE FOR CONTROLLING SAID VALVE IN RESPONSE TO CHANGES IN SAID TEMPERATURE DIFFERENTIAL.
Claim 4
Dependent Claim
159 words
APPARATUS FOR STEAM STRIPPING A PETROLEUM OIL STREAM WITHDRAWN FROM A FRACTIONATING COLUMN WHICH COMPRISES A STRIPPING COLUMN HAVING VAPOR-LIQUID CONTACTING MEAN THEREIN, A FEED LINE AT THE UPPER END OF SAID STRIPPING COLUMN FROM INTRODUCING SAID PETROLEUM OIL STREAM FROM SAID FRACTIONATING COLUMN, AN OVERHEAD LINE AT THE UPPER END OF SAID STRIPPING COLUMN FOR RETURNING STRIPPED VAPOR TO SAID FRACTIONATING COLUMN, A BOTTOM LIQUID LINE AT THE LOWER END OF SAID STRIPPING COLUMN, TEMPERATURE-SENSITIVE MEANS IN SAID FEED LINE AND TEMPERATURE-SENSITIVE MEANS IN SAID BOTTOMS LIQUID LINE, A LINE FOR INTRODUCING STEAM TO SAID STRIPPING COLUMN, A FFLOW CONTROL VALVE INH SAID STEAM LINE, AND A DIFFERENTIAL TEMPERATURE CONTROLLER CONNECTED WITH SAID TEMPERATURE-SENSITIVE MEANS FORRE DIFMEASURING THE TEMPERATURE DIFFERENTIAL BETWEEN THE FEED LINE AND THE BOTTOMS LIQUID LINE, SAID DIFFERENTIAL TEMPERATURE CONTROLLER BEING ALSO OPERATIVELY CONNECTED WITH THE FLOW CONTROL VALVE IN THE STEAM LINE FOR CONTROLLING SAID VALVE IN RESPONSE TO CHANGES IN SAID TEMPERATURE DIFFERENTIAL.
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) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |