US3201492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of hydrocarbons possessing volatility differences
Assignee: Phillips Petroleum Co
•
Filing: 1962-01-02
•
Granted: 1965-08-17
•
Expires: 1982-01-02
Abstract
No abstract record available.
Inventors
- 👤 Fred T Sherk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:15
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
220 words
A SEPARATION PROCESS WHICH COMPRISES PASSING AN ORGANIC FEED MIXTURE TO A SOLVENT EXTRACTION ZONE AND THEREIN CONTACTING SAID ORGANIC FEED, PASSING A SELECTIVE SOLVENT TO SAID EXTRACTION ZONE, SAID SELECTIVE SOLVENT CAPABLE OF EXTRACTING AN INTERMEDIATE FRACTION OF SAID ORGANIC MIXTURE, SAID INTERMEDIATE FRACTION HAVING A VOLATILITY INTERMEDIATE OF THE REMAINDER OF SAID ORGANIC MIXTURE, PASSING A RAFFINATE STREAM FROM SAID SOLVENT EXTRACTION ZONE TO A FRACTIONAL DISTILLATION ZONE, WITHDRAWING AN OVERHEAD PRODUCT STREAM HAVING A GREATER VOLATILITY THAN THE VOLATILITY OF SAID INTERMEDIATE FRACTION FROM SAID FRACTIONAL DISTILLATION ZONE, RECYCLING AS REFLUX A PORTION OF SAID WITHDRAWN OVERHEAD STREAM TO THE LOWER REGION OF SAID SOLVENT EXTRACTION ZONE, WITHDRAWING FROM THE LOWER REGION OF SAID FRACTIONAL DISTILLATION ZONE A PRODUCT STREAM HAVING A VOLATILITY LESS THAN THE VOLATILITY OF SAID INTERMEDIATE FRACTION, PASSING A SOLVENT STREAM CONTAINING SAID INTERMEDIATE FRACTION FROM THE LOWER REGION OF SAID SOLVENT EXTRACTION ZONE TO A SOLVENT STRIPPING ZONE, WITHDRAWING FROM SAID SOLVENT STRIPPING ZONE A VOLATILE FRACTION, PASSING SAID WITHDRAWN VOLATILE FRACTION FROM SAID SOLVENT STRIPPING ZONE AS REFLUX TO SAID SOLVENT EXTRACTION ZONE, PASSING A SOLVENT STREAM FROM THE LOWER REGION OF SAID SOLVENT STRIPPING ZONE TO SAID SOLVENT EXTRACTION ZONE, AND WITHDRAWING FROM AN INTERMEDIATE REGION OF SAID SOLVENT STRIPPING ZONE AN INTERMEDIATE VOLATILE PRODUCT STREAM COMPRISING SAID INTERMEDIATE FRACTION.
Claim 2
Dependent Claim
220 words
A SEPARATION PROCESS WHICH COMPRISES PASSING AN ORGANIC FEED MIXTURE TO A SOLVENT EXTRACTION ZONE AND THEREIN CONTACTING SAID ORGANIC FEED, PASSING A SELECTIVE SOLVENT TO SAID EXTRACTION ZONE, SAID SELECTIVE SOLVENT CAPABLE OF EXTRACTING AN INTERMEDIATE FRACTION OF SAID ORGANIC MIXTURE, SAID INTERMEDIATE FRACTION HAVING A VOLATILITY INTERMEDIATE OF THE REMAINDER OF SAID ORGANIC MIXTURE, PASSING A RAFFINATE STREAM FROM SAID SOLVENT EXTRACTION ZONE TO A FRACTIONAL DISTILLATION ZONE, WITHDRAWING AN OVERHEAD PRODUCT STREAM HAVING A GREATER VOLATILITY THAN THE VOLATILITY OF SAID INTERMEDIATE FRACTION FROM SAID FRACTIONAL DISTILLATION ZONE, RECYCLING AS REFLUX A PORTION OF SAID WITHDRAWN OVERHEAD STREAM TO THE LOWER REGION OF SAID SOLVENT EXTRACTION ZONE, WITHDRAWING FROM THE LOWER REGION OF SAID FRACTIONAL DISTILLATION ZONE A PRODUCT STREAM HAVING A VOLATILITY LESS THAN THE VOLATILITY OF SAID INTERMEDIATE FRACTION, PASSING A SOLVENT STREAM CONTAINING SAID INTERMEDIATE FRACTION FROM THE LOWER REGION OF SAID SOLVENT EXTRACTION ZONE TO A SOLVENT STRIPPING ZONE, WITHDRAWING FROM SAID SOLVENT STRIPPING ZONE A VOLATILE FRACTION, PASSING SAID WITHDRAWN VOLATILE FRACTION FROM SAID SOLVENT STRIPPING ZONE AS REFLUX TO SAID SOLVENT EXTRACTION ZONE, PASSING A SOLVENT STREAM FROM THE LOWER REGION OF SAID SOLVENT STRIPPING ZONE TO SAID SOLVENT EXTRACTION ZONE, AND WITHDRAWING FROM AN INTERMEDIATE REGION OF SAID SOLVENT STRIPPING ZONE AN INTERMEDIATE VOLATILE PRODUCT STREAM COMPRISING SAID INTERMEDIATE FRACTION.
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |