US2920113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of a vaporizable hydrocarbon from liquid mixtures
Assignee: Phillips Petroleum Co
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Filing: 1956-07-27
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Granted: 1960-01-05
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Expires: 1976-07-27
Abstract
No abstract record available.
Inventors
- 👤 Lyle W Pollock
- 👤 Alvin J Andrews
- 👤 Edward N Pennington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:05
CPC Classifications
C; C08; C08C; C08C1/00; C08C1/02; C08C1/04; C07; C07C; C07C17/00; C07C17/38; C07C7/00; C07C7/005; C08F; C08F2/00; Y; Y10; Y10S; Y10S159/00; Y10S159/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A METHOD OF RECOVERING AN ALIPHATIC CONJUGATED DIENE FROM A LATEX MIXTURE WHICH COMPRISES INTRODUCING SAID LATEX INTO A SEPARATION ZONE MAINTAINED AT A PRESSURE OF AT LEAST ATMOSPHERIC, RECOVERING A SUBSTANTIAL PORTION OF SAID ALIPHATIC CONJUGATED DIENE AS A FIRST VAPOROUS OVERHEAD STREAM FROM SAID SEPARATION ZONE, INTRODUCING THE LATEX EFFLUENT FROM SAID SEPARATION ZONE TO A FLASH ZONE MAINTAINED AT SUB-ATMOSPHERIC PRESSURE, RECOVERING A SECOND VAPOROUS OVERHEAD STREAM COMPRISING ALIPHATIC CONJUGATED DIENE AND FREE OXYGEN GAS, INTRODUCING SAID SECOND STREAM INTO AN ABSORPTION ZONE TO CONTACT WITH AN ABSORPTION SOLVENT, SAID ABSORPTION SOLVENT SELECTIVELY EXTRACTISNG SAID ALIPHATIC CONJUGATED DIENE, REMOVING OVERHEAD UNABSORBED GASES COMPRISING FREE OXYGEN GAS FROM THE ABSORPTION ZONE, AND RECOVERING SAID ALIPHATIC CONJUGATED DIENE FROM SAID ABSORPTION SOLVENT.
Claim 2
Independent Claim
123 words
A METHOD OF RECOVERING AN ALIPHATIC CONJUGATED DIENE FROM A LATEX MIXTURE WHICH COMPRISES INTRODUCING SAID LATEX INTO A SEPARATION ZONE MAINTAINED AT A PRESSURE OF AT LEAST ATMOSPHERIC, RECOVERING A SUBSTANTIAL PORTION OF SAID ALIPHATIC CONJUGATED DIENE AS A FIRST VAPOROUS OVERHEAD STREAM FROM SAID SEPARATION ZONE, INTRODUCING THE LATEX EFFLUENT FROM SAID SEPARATION ZONE TO A FLASH ZONE MAINTAINED AT SUB-ATMOSPHERIC PRESSURE, RECOVERING A SECOND VAPOROUS OVERHEAD STREAM COMPRISING ALIPHATIC CONJUGATED DIENE AND FREE OXYGEN GAS, INTRODUCING SAID SECOND STREAM INTO AN ABSORPTION ZONE TO CONTACT WITH AN ABSORPTION SOLVENT, SAID ABSORPTION SOLVENT SELECTIVELY EXTRACTISNG SAID ALIPHATIC CONJUGATED DIENE, REMOVING OVERHEAD UNABSORBED GASES COMPRISING FREE OXYGEN GAS FROM THE ABSORPTION ZONE, AND RECOVERING SAID ALIPHATIC CONJUGATED DIENE FROM SAID ABSORPTION SOLVENT.
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) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |