Patent US2695322A successfully refreshed from Google Patents.
US2695322A
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Separation of naphthenes from a saturated hydrocarbon mixture with the use of methylalcohol and water
Assignee: Phillips Petroleum Co
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Filing: 1949-10-24
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Granted: 1954-11-23
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Expires: 1969-10-24
Abstract
No abstract record available.
Inventors
- 👤 John A Weedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:08
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/10; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A METHOD FOR SEPARATING NAPHTHENES FROM A SATURATED HYDROCARBON MIXTURE CONSISTING ESSENTIALLY OF NAPHTHENES HAVING SIX CARBON ATOMS PER MOLECULE AND CLOSE BOILING PARAFFINS COMPRISING CONTACTING SAID MIXTURE WITH METHYL ALCOHOL CONTAINING 5 TO 20 PER CENT WATER BASED ON THE WEIGHT OF THE METHYL ALCOHOL, FROM THIS CONTACTING OPERATION SEPARATING A RAFFINATE PHASE COMPRISING PARAFFINS AND AN EXTRACT PHASE COMPRISING NAPHTHENES, AND RECOVERING NAPHTHENES HAVING SIX CARBON ATOMS FROM THE EXTRACT PHASE AS A PRODUCT OF THE PROCESS.
Claim 2
Independent Claim
79 words
A METHOD FOR SEPARATING NAPHTHENES FROM A SATURATED HYDROCARBON MIXTURE CONSISTING ESSENTIALLY OF NAPHTHENES HAVING SIX CARBON ATOMS PER MOLECULE AND CLOSE BOILING PARAFFINS COMPRISING CONTACTING SAID MIXTURE WITH METHYL ALCOHOL CONTAINING 5 TO 20 PER CENT WATER BASED ON THE WEIGHT OF THE METHYL ALCOHOL, FROM THIS CONTACTING OPERATION SEPARATING A RAFFINATE PHASE COMPRISING PARAFFINS AND AN EXTRACT PHASE COMPRISING NAPHTHENES, AND RECOVERING NAPHTHENES HAVING SIX CARBON ATOMS FROM THE EXTRACT PHASE AS A PRODUCT OF THE PROCESS.
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) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |